10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2019

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

For the transition period from _______ to _______    

Commission File Number: 1-35335

Groupon, Inc.
(Exact name of registrant as specified in its charter)
Delaware	27-0903295
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
600 W Chicago Avenue	60654
Suite 400	(Zip Code)
Chicago
Illinois	(312)	334-1579
(Address of principal executive offices)	(Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common stock, par value $0.0001 per share	GRPN	NASDAQ Global Select Market

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes  ☒         No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).        

Yes  ☒        No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer ☒                            Accelerated filer ☐         

Non-accelerated filer ☐                            Smaller reporting company ☐

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes ☐        No  ☒ 

As of July 26, 2019, there were 567,619,924 shares of the registrant's common stock outstanding.

TABLE OF CONTENTS

PART I. Financial Information	Page
Forward-Looking Statements	3
Item 1. Financial Statements and Supplementary Data	4
Condensed Consolidated Balance Sheets as of June 30, 2019 (unaudited) and December 31, 2018	4
Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) for the three and six months ended June 30, 2019 and 2018 (unaudited)	5
Condensed Consolidated Statements of Stockholders' Equity for the six months ended June 30, 2019 and 2018 (unaudited)	6
Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2019 and 2018 (unaudited)	8
Notes to Condensed Consolidated Financial Statements (unaudited)	10
Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations	27
Item 3. Quantitative and Qualitative Disclosures about Market Risk	51
Item 4. Controls and Procedures	52
PART II. Other Information
Item 1. Legal Proceedings	53
Item 1A. Risk Factors	53
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	53
Item 5. Other Information	54
Item 6. Exhibits	54
Signatures	55

______________________________________________________

2

PART I. FINANCIAL INFORMATION

FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, including statements regarding our future results of operations and financial position, business strategy and plans and our objectives for future operations. The words "may," "will," "should," "could," "expect," "anticipate," "believe," "estimate," "intend," "continue" and other similar expressions are intended to identify forward-looking statements. We have based these forward-looking statements largely on current expectations and projections about future events and financial trends that we believe may affect our financial condition, results of operations, business strategy, short-term and long-term business operations and objectives, and financial needs. These forward-looking statements involve risks and uncertainties that could cause our actual results to differ materially from those expressed or implied in our forward-looking statements. Such risks and uncertainties include, but are not limited to, risks related to volatility in our operating results; execution of our business and marketing strategies; retaining existing customers and adding new customers; challenges arising from our international operations, including fluctuations in currency exchange rates, legal and regulatory developments and any potential adverse impact from the United Kingdom's likely exit from the European Union; retaining and adding high quality merchants; our voucherless offerings; cybersecurity breaches; reliance on cloud-based computing platforms; competing successfully in our industry; changes to merchant payment terms; providing a strong mobile experience for our customers; maintaining and improving our information technology infrastructure; delivery and routing of our emails; claims related to product and service offerings; managing inventory and order fulfillment risks; litigation; managing refund risks; retaining and attracting members of our executive team; completing and realizing the anticipated benefits from acquisitions, dispositions, joint ventures and strategic investments; lack of control over minority investments; compliance with domestic and foreign laws and regulations, including the CARD Act, GDPR and regulation of the Internet and e-commerce; classification of our independent contractors or employees; tax liabilities; tax legislation; protecting our intellectual property; maintaining a strong brand; customer and merchant fraud; payment-related risks; our ability to raise capital if necessary and our outstanding indebtedness; global economic uncertainty; our common stock, including volatility in our stock price; our convertible senior notes; our ability to realize the anticipated benefits from the hedge and warrant transactions; and those risks and other factors discussed in Part I, Item 1A, Risk Factors of our Annual Report on Form 10-K for the year ended December 31, 2018, and Part II, Item 1A , Risk Factors of our Quarterly report on Form 10-Q for the quarter ended March 31, 2019, as well as in our condensed consolidated financial statements, related notes, and the other financial information appearing elsewhere in this report and our other filings with the Securities and Exchange Commission ("SEC"). Moreover, we operate in a very competitive and rapidly changing environment. New risks emerge from time to time. It is not possible for our management to predict all risks, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. We do not intend, and undertake no obligation, to update any of our forward-looking statements after the date of this report to reflect actual results or future events or circumstances. Given these risks and uncertainties, readers are cautioned not to place undue reliance on such forward-looking statements.

As used herein, "Groupon," the "Company," "we," "our," "us" and similar terms include Groupon, Inc. and its subsidiaries, unless the context indicates otherwise.

3

ITEM 1. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

GROUPON, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except share and per share amounts)

	June 30, 2019			December 31, 2018
	(unaudited)
Assets
Current assets:
Cash and cash equivalents	$	596,837		$	841,021
Accounts receivable, net	74,706			69,493
Prepaid expenses and other current assets	91,056			88,115
Total current assets	762,599			998,629
Property, equipment and software, net	134,672			143,117
Right-of-use assets - operating leases, net	114,500			—
Goodwill	324,705			325,491
Intangible assets, net	38,996			45,401
Investments	39,301			108,515
Other non-current assets	24,435			20,989
Total Assets	$	1,439,208		$	1,642,142
Liabilities and Equity
Current liabilities:
Accounts payable	$	26,968		$	38,359
Accrued merchant and supplier payables	464,125			651,781
Accrued expenses and other current liabilities	258,610			267,034
Total current liabilities	749,703			957,174
Convertible senior notes, net	208,100			201,669
Operating lease obligations	121,526			—
Other non-current liabilities	53,740			100,688
Total Liabilities	1,133,069			1,259,531
Commitments and contingencies (see Note 7)
Stockholders' Equity
Common stock, par value $0.0001 per share, 2,010,000,000 shares authorized; 767,155,735 shares issued and 566,664,464 shares outstanding at June 30, 2019; 760,939,440 shares issued and 569,084,312 shares outstanding at December 31, 2018	76			76
Additional paid-in capital	2,271,600			2,234,560
Treasury stock, at cost, 200,491,271 and 191,855,128 shares at June 30, 2019 and December 31, 2018	(907,599		)	(877,491		)
Accumulated deficit	(1,093,232		)	(1,010,499		)
Accumulated other comprehensive income (loss)	34,485			34,602
Total Groupon, Inc. Stockholders' Equity	305,330			381,248
Noncontrolling interests	809			1,363
Total Equity	306,139			382,611
Total Liabilities and Equity	$	1,439,208		$	1,642,142

See Notes to Condensed Consolidated Financial Statements.

4

GROUPON, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)

(in thousands, except share and per share amounts)

(unaudited)

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Revenue:
Service	$	277,603		$	295,652		$	563,430		$	597,449
Product	254,974			321,744			547,557			646,487
Total revenue	532,577			617,396			1,110,987			1,243,936
Cost of revenue:
Service	28,595			30,230			57,222			61,375
Product	211,850			263,508			455,617			534,018
Total cost of revenue	240,445			293,738			512,839			595,393
Gross profit	292,132			323,658			598,148			648,543
Operating expenses:
Marketing	88,923			94,178			182,320			193,334
Selling, general and administrative	210,348			293,725			420,772			516,069
Total operating expenses	299,271			387,903			603,092			709,403
Income (loss) from operations	(7,139		)	(64,245		)	(4,944		)	(60,860		)
Other income (expense), net	(28,494		)	(26,457		)	(75,349		)	(34,972		)
Income (loss) from continuing operations before provision (benefit) for income taxes	(35,633		)	(90,702		)	(80,293		)	(95,832		)
Provision (benefit) for income taxes	2,012			1,552			(1,478		)	(783		)
Income (loss) from continuing operations	(37,645		)	(92,254		)	(78,815		)	(95,049		)
Income (loss) from discontinued operations, net of tax	—			—			2,162			—
Net income (loss)	(37,645		)	(92,254		)	(76,653		)	(95,049		)
Net income attributable to noncontrolling interests	(2,601		)	(2,780		)	(6,080		)	(6,873		)
Net income (loss) attributable to Groupon, Inc.	$	(40,246	)	$	(95,034	)	$	(82,733	)	$	(101,922	)
Basic and diluted net income (loss) per share:
Continuing operations	$	(0.07	)	$	(0.17	)	$	(0.15	)	$	(0.18	)
Discontinued operations	0.00			0.00			0.01			0.00
Basic and diluted net income (loss) per share	$	(0.07	)	$	(0.17	)	$	(0.14	)	$	(0.18	)
Weighted average number of shares outstanding
Basic	567,962,461			565,284,705			569,014,065			563,502,954
Diluted	567,962,461			565,284,705			569,014,065			563,502,954
Comprehensive income (loss):
Net income (loss)	$	(37,645	)	$	(92,254	)	$	(76,653	)	$	(95,049	)
Other comprehensive income (loss):
Other comprehensive income (loss) from continuing operations:
Net change in unrealized gain (loss) on foreign currency translation adjustments	(3,285		)	2,806			(13		)	1,238
Net change in unrealized gain (loss) on available-for-sale securities (net of tax effect of ($48) and $0 for the three months ended June 30, 2019 and 2018, and ($35) and $0 for the six months ended June 30, 2019 and 2018)	(145		)	(435		)	(104		)	(936		)
Other comprehensive income (loss) from continuing operations	(3,430		)	2,371			(117		)	302
Other comprehensive income (loss) from discontinued operations	—			—			—			—
Other comprehensive income (loss)	(3,430		)	2,371			(117		)	302
Comprehensive income (loss)	(41,075		)	(89,883		)	(76,770		)	(94,747		)
Comprehensive income (loss) attributable to noncontrolling interest	(2,601		)	(2,780		)	(6,080		)	(6,873		)
Comprehensive income (loss) attributable to Groupon, Inc.	$	(43,676	)	$	(92,663	)	$	(82,850	)	$	(101,620	)

See Notes to Condensed Consolidated Financial Statements.

5

GROUPON, INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

(in thousands, except share amounts)

(unaudited)

	Groupon, Inc. Stockholders' Equity
	Common Stock				Additional Paid-In Capital			Treasury Stock					Accumulated Deficit			Accumulated Other Comprehensive Income (Loss)			Total Groupon, Inc. Stockholders' Equity			Non-controlling Interests			Total Equity
	Shares		Amount					Shares		Amount
Balance at December 31, 2018	760,939,440		$	76	$	2,234,560		(191,855,128	)	$	(877,491	)	$	(1,010,499	)	$	34,602		$	381,248		$	1,363		$	382,611
Net income (loss)	—		—		—			—		—			(42,487		)	—			(42,487		)	3,479			(39,008		)
Foreign currency translation	—		—		—			—		—			—			3,272			3,272			—			3,272
Unrealized gain (loss) on available-for-sale securities, net of tax	—		—		—			—		—			—			41			41			—			41
Exercise of stock options	12,500		—		8			—		—			—			—			8			—			8
Vesting of restricted stock units and performance share units	4,160,415		—		—			—		—			—			—			—			—			—
Shares issued under employee stock purchase plan	719,297		—		1,998			—		—			—			—			1,998			—			1,998
Tax withholdings related to net share settlements of stock-based compensation awards	(1,585,728	)	—		(5,681		)	—		—			—			—			(5,681		)	—			(5,681		)
Purchases of treasury stock	—		—		—			(4,407,995	)	(15,055		)	—			—			(15,055		)	—			(15,055		)
Stock-based compensation on equity-classified awards	—		—		17,731			—		—			—			—			17,731			—			17,731
Distributions to noncontrolling interest holders	—		—		—			—		—			—			—			—			(3,521		)	(3,521		)
Balance at March 31, 2019	764,245,924		76		2,248,616			(196,263,123	)	(892,546		)	(1,052,986		)	37,915			341,075			1,321			342,396
Net income (loss)	—		—		—			—		—			(40,246		)	—			(40,246		)	2,601			(37,645		)
Foreign currency translation	—		—		—			—		—			—			(3,285		)	(3,285		)	—			(3,285		)
Unrealized gain (loss) on available-for-sale securities, net of tax	—		—		—			—		—			—			(145		)	(145		)	—			(145		)
Exercise of stock options	30,000		—		32			—		—			—			—			32			—			32
Vesting of restricted stock units and performance share units	4,404,213		—		—			—		—			—			—			—			—			—
Tax withholdings related to net share settlements of stock-based compensation awards	(1,524,402	)	—		(5,387		)	—		—			—			—			(5,387		)	—			(5,387		)
Purchases of treasury stock	—		—		—			(4,228,148	)	(15,053		)	—			—			(15,053		)	—			(15,053		)
Stock-based compensation on equity-classified awards	—		—		28,339					—			—			—			28,339			—			28,339
Distributions to noncontrolling interest holders	—		—		—			—		—			—			—			—			(3,113		)	(3,113		)
Balance at June 30, 2019	767,155,735		$	76	$	2,271,600		(200,491,271	)	$	(907,599	)	$	(1,093,232	)	$	34,485		$	305,330		$	809		$	306,139

See Notes to Condensed Consolidated Financial Statements.

6

GROUPON, INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

(in thousands, except share amounts)

(unaudited)

	Groupon, Inc. Stockholders' Equity
	Common Stock				Additional Paid-In Capital			Treasury Stock					Accumulated Deficit			Accumulated Other Comprehensive Income (Loss)			Total Groupon, Inc. Stockholders' Equity			Non-controlling Interests			Total Equity
	Shares		Amount					Shares		Amount
Balance at December 31, 2017	748,541,862		$	75	$	2,174,708		(188,602,242	)	$	(867,450	)	$	(1,088,204	)	$	31,844		$	250,973		$	872		$	251,845
Cumulative effect of change in accounting principle, net of tax	—		—		—			—		—			88,945			—			88,945			—			88,945
Reclassification for impact of U.S. tax rate change	—		—		—			—		—			(161		)	161			—			—			—
Net income (loss)	—		—		—			—		—			(6,888		)	—			(6,888		)	4,093			(2,795		)
Foreign currency translation	—		—		—			—		—			—			(1,568		)	(1,568		)	—			(1,568		)
Unrealized gain (loss) on available-for-sale securities, net of tax	—		—		—			—		—			—			(501		)	(501		)	—			(501		)
Exercise of stock options	2,400		—		6			—		—			—			—			6			—			6
Vesting of restricted stock units and performance share units	4,157,462		—		—			—		—			—			—			—			—			—
Shares issued under employee stock purchase plan	746,773		—		2,434			—		—			—			—			2,434			—			2,434
Shares issues to settle liability-classified awards	1,240,379		—		6,436			—		—			—			—			6,436			—			6,436
Tax withholdings related to net share settlements of stock-based compensation awards	(2,024,590	)	—		(9,355		)	—		—			—			—			(9,355		)	—			(9,355		)
Stock-based compensation on equity-classified awards	—		—		18,240			—		—			—			—			18,240			—			18,240
Distributions to noncontrolling interest holders	—		—		—			—		—			—			—			—			(3,315		)	(3,315		)
Balance on March 31, 2018	752,664,286		75		2,192,469			(188,602,242	)	(867,450		)	(1,006,308		)	29,936			348,722			1,650			350,372
Net income (loss)	—		—		—			—		—			(95,034		)	—			(95,034		)	2,780			(92,254		)
Foreign currency translation	—		—		—			—		—			—			2,806			2,806			—			2,806
Unrealized gain (loss) on available-for-sale securities, net of tax	—		—		—			—		—			—			(435		)	(435		)	—			(435		)
Exercise of stock options	665,343		—		64			—		—			—			—			64			—			64
Vesting of restricted stock units and performance share units	3,628,257		1		(1		)	—		—			—			—			—			—			—
Tax withholdings related to net share settlements of stock-based compensation awards	(1,151,259	)	—		(5,144		)	—		—			—			—			(5,144		)	—			(5,144		)
Stock-based compensation on equity-classified awards	—		—		19,353			—		—			—			—			19,353			—			19,353
Distributions to noncontrolling interest holders	—		—		—			—		—			—			—			—			(3,625		)	(3,625		)
Balance at June 30, 2018	755,806,627		$	76	$	2,206,741		(188,602,242	)	$	(867,450	)	$	(1,101,342	)	$	32,307		$	270,332		$	805		$	271,137

See Notes to Condensed Consolidated Financial Statements.

7

GROUPON, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(unaudited)

	Six Months Ended June 30,
	2019			2018
Operating activities
Net income (loss)	$	(76,653	)	$	(95,049	)
Less: Income (loss) from discontinued operations, net of tax	2,162			—
Income (loss) from continuing operations	(78,815		)	(95,049		)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization of property, equipment and software	47,861			52,149
Amortization of acquired intangible assets	7,671			6,466
Stock-based compensation	42,974			35,644
Impairments of investments	—			10,044
Deferred income taxes	360			(6,575		)
(Gain) loss from changes in fair value of investments	68,985			8,068
Amortization of debt discount on convertible senior notes	6,431			5,806
Change in assets and liabilities, net of acquisitions and dispositions:
Accounts receivable	(5,311		)	27,296
Prepaid expenses and other current assets	(4,021		)	1,489
Accounts payable	(10,890		)	(9,340		)
Accrued merchant and supplier payables	(186,519		)	(172,982		)
Accrued expenses and other current liabilities	(44,696		)	51,140
Other, net	7,268			10,272
Net cash provided by (used in) operating activities from continuing operations	(148,702		)	(75,572		)
Net cash provided by (used in) operating activities from discontinued operations	—			—
Net cash provided by (used in) operating activities	(148,702		)	(75,572		)
Investing activities
Purchases of property and equipment and capitalized software	(34,161		)	(37,517		)
Acquisition of business, net of acquired cash	—			(57,821		)
Acquisitions of intangible assets and other investing activities	(1,189		)	(758		)
Net cash provided by (used in) investing activities from continuing operations	(35,350		)	(96,096		)
Net cash provided by (used in) investing activities from discontinued operations	—			—
Net cash provided by (used in) investing activities	(35,350		)	(96,096		)
Financing activities
Issuance costs for revolving credit agreement	(2,334		)	—
Payments for purchases of treasury stock	(29,569		)	—
Taxes paid related to net share settlements of stock-based compensation awards	(10,231		)	(16,138		)
Proceeds from stock option exercises and employee stock purchase plan	2,038			2,504
Distributions to noncontrolling interest holders	(6,634		)	(6,940		)
Payments of finance lease obligations	(12,628		)	(17,239		)
Payments of contingent consideration related to acquisitions	—			(1,815		)
Net cash provided by (used in) financing activities	(59,358		)	(39,628		)
Effect of exchange rate changes on cash, cash equivalents and restricted cash, including cash classified within current assets	(1,755		)	(6,644		)
Net increase (decrease) in cash, cash equivalents and restricted cash, including cash classified within current assets	(245,165		)	(217,940		)
Less: Net increase (decrease) in cash classified within current assets of discontinued operations	—			—
Net increase (decrease) in cash, cash equivalents and restricted cash	(245,165		)	(217,940		)
Cash, cash equivalents and restricted cash, beginning of period	844,728			885,481
Cash, cash equivalents and restricted cash, end of period (1)	$	599,563		$	667,541

Non-cash investing and financing activities
Continuing operations:
Equipment acquired under capital lease arrangements (2)	$	—		$	9,581
Leasehold improvements funded by lessor	—			557
Liability for purchases of treasury stock	(995		)	—
Increase (decrease) in liabilities related to purchases of property and equipment and capitalized software	(767		)	(789		)
Contingent consideration liabilities incurred in connection with acquisition of business	—			1,589
Financing obligation incurred in connection with acquisition of business	—			8,604

8

GROUPON, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(unaudited)

(1) The following table provides a reconciliation of cash, cash equivalents and restricted cash shown above to amounts reported within the condensed consolidated balance sheet as of June 30, 2019 and December 31, 2018 and amounts previously reported within the condensed consolidated balance sheet in our Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2018 (in thousands):

	June 30, 2019		June 30, 2018		December 31, 2018
Cash and cash equivalents	$	596,837	$	662,893	$	841,021
Restricted cash included in prepaid expenses and other current assets	2,340		4,250		3,320
Restricted cash included in other non-current assets	386		398		387
Cash, cash equivalents and restricted cash	$	599,563	$	667,541	$	844,728

(2) Please refer to Note 6, Leases, for supplemental cash flow information on our leasing obligations, as required by our adoption of ASU 2016-02, Leases ("Topic 842"), on January 1, 2019.

See Notes to Condensed Consolidated Financial Statements.

9

GROUPON, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

1. DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

Company Information

Groupon, Inc. and its subsidiaries, which commenced operations in October 2008, operate online local commerce marketplaces throughout the world that connect merchants to consumers by offering goods and services, generally at a discount. Customers access those marketplaces through our websites, primarily localized groupon.com sites in many countries, and our mobile applications.

Our operations are organized into two segments: North America and International. See Note 13, Segment Information.

Unaudited Interim Financial Information

We have prepared the accompanying condensed consolidated financial statements pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC") for interim financial reporting. These condensed consolidated financial statements are unaudited and, in our opinion, include all adjustments, consisting of normal recurring adjustments and accruals, necessary for a fair presentation of the condensed consolidated balance sheets, statements of operations and comprehensive income (loss), cash flows and stockholders' equity for the periods presented. Operating results for the periods presented are not necessarily indicative of the results to be expected for the full year ending December 31, 2019. Certain information and disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles ("U.S. GAAP") have been omitted in accordance with the rules and regulations of the SEC. These condensed consolidated financial statements and notes should be read in conjunction with the audited consolidated financial statements and notes included in our Annual Report on Form 10-K for the year ended December 31, 2018, filed with the SEC on February 12, 2019.

Principles of Consolidation

The condensed consolidated financial statements include the accounts of Groupon, Inc. and its subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The condensed consolidated financial statements were prepared in accordance with U.S. GAAP and include the assets, liabilities, revenue and expenses of all wholly-owned subsidiaries and majority-owned subsidiaries over which we exercise control and a variable interest entity for which we have determined that we are the primary beneficiary. In the first quarter of 2019, we extended our arrangement through July 2022 with the strategic partner in the variable interest entity that we consolidate. Outside stockholders' interests in subsidiaries are shown on the condensed consolidated financial statements as Noncontrolling interests. Investments in entities in which we do not have a controlling financial interest are accounted for under the equity method, the fair value option, as available-for-sale securities or at cost adjusted for observable price changes and impairments, as appropriate.

Adoption of New Accounting Standards

We adopted the guidance in ASU 2016-02, Leases (Topic 842) on January 1, 2019. This ASU requires the recognition of lease assets and liabilities for operating leases, in addition to the finance lease assets and liabilities historically recorded on our condensed consolidated balance sheets. See Note 6, Leases, for information on the impact of adopting Topic 842 on our accounting policies.

We adopted the guidance in ASU 2018-07, Compensation - Stock Compensation (Topic 718) - Improvements to Nonemployee Share-Based Payment Accounting, on January 1, 2019. This ASU expands the scope to make the guidance for share-based payment awards to nonemployees consistent with the guidance for share-based payment awards to employees. The adoption of ASU 2018-07 did not have a material impact on the condensed consolidated financial statements.

We adopted the guidance in ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40) - Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, on January 1, 2019. This ASU requires entities in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40, Internal Use Software, to determine which costs to implement the service contract would be capitalized as an asset related to the service contract and which costs would be expensed. The requirements of ASU 2018-15 have been applied on a prospective basis to implementation costs incurred on or after January 1, 2019. As a result of the adoption of ASU 2018-15, we capitalized $1.9 million and $2.8 million of implementation costs for the three and six months ended June 30, 2019. Those capitalized costs are included within Other non-current assets on the condensed consolidated balance sheet as of June 30, 2019. We have not recognized any amortization related to these implementation costs. We will amortize the implementation costs on a straight-line basis over the term of the associated hosting arrangement for each module or component of the related hosting arrangement when it is ready for its intended use. Amortization costs will be recorded in Selling, general and administrative expense on the condensed consolidated statements of operations.

Reclassifications and Terminology Changes

Certain reclassifications have been made to the condensed consolidated financial statements of prior periods and the accompanying notes to conform to the current period presentation.

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires estimates and assumptions that affect the reported amounts and classifications of assets and liabilities, revenue and expenses, and the related disclosures of contingent liabilities in the condensed consolidated financial statements and accompanying notes. Estimates are used for, but not limited to, variable consideration from unredeemed vouchers, income taxes, initial valuation and subsequent impairment testing of goodwill and intangible assets, investments, customer refunds, contingent liabilities and the useful lives of property, equipment and software and intangible assets. Actual results could differ materially from those estimates.

2. GOODWILL AND OTHER INTANGIBLE ASSETS

The following table summarizes goodwill activity by segment for the six months ended June 30, 2019 (in thousands):

	North America		International			Consolidated
Balance as of December 31, 2018	$	178,685	$	146,806		$	325,491
Foreign currency translation	—		(786		)	(786		)
Balance as of June 30, 2019	$	178,685	$	146,020		$	324,705

The following table summarizes intangible assets as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019						December 31, 2018
Asset Category	Gross Carrying Value		Accumulated Amortization		Net Carrying Value		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Customer relationships	$	16,200	$	14,400	$	1,800	$	16,200	$	11,700	$	4,500
Merchant relationships	21,486		6,157		15,329		21,554		4,105		17,449
Trade names	9,467		7,074		2,393		9,476		6,799		2,677
Developed technology	13,813		13,601		212		13,825		13,485		340
Patents	21,744		17,254		4,490		20,508		16,451		4,057
Other intangible assets	26,091		11,319		14,772		26,007		9,629		16,378
Total	$	108,801	$	69,805	$	38,996	$	107,570	$	62,169	$	45,401

10

GROUPON, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(unaudited)

Amortization of intangible assets is computed using the straight-line method over their estimated useful lives, which range from 1 to 10 years. Amortization expense related to intangible assets was $3.8 million and $3.5 million for the three months ended June 30, 2019 and 2018, and $7.7 million and $6.4 million for the six months ended June 30, 2019 and 2018. As of June 30, 2019, estimated future amortization expense related to intangible assets is as follows (in thousands):

Remaining amounts in 2019	$	6,384
2020	7,780
2021	7,046
2022	6,730
2023	5,582
Thereafter	5,474
Total	$	38,996

3. INVESTMENTS

The following table summarizes investments as of June 30, 2019 and December 31, 2018 (dollars in thousands):

	June 30, 2019		Percent Ownership of Voting Stock			December 31, 2018		Percent Ownership of Voting Stock
Available-for-sale securities - redeemable preferred shares	$	10,201	19%	to	25%	$	10,340	19%	to	25%
Fair value option investments	4,917		10%	to	19%	73,902		10%	to	19%
Other equity investments	24,183		1%	to	19%	24,273		1%	to	19%
Total investments	$	39,301				$	108,515

Available-for-Sale Securities - Redeemable Preferred Shares

The following table summarizes amortized cost, gross unrealized gain, gross unrealized loss and fair value of redeemable preferred shares as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Amortized cost	$	9,961	$	9,961
Gross unrealized gain (loss)	240		379
Fair value	$	10,201	$	10,340

We recorded other-than-temporary impairments of available-for-sale securities of $4.6 million and $5.4 million for the three and six months ended June 30, 2018. Those impairments are classified within Other income (expense), net on the condensed consolidated statements of operations. There were no impairments of available-for-sale securities for the three and six months ended June 30, 2019.

11

GROUPON, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(unaudited)

Fair Value Option Investments    

In connection with the dispositions of controlling stakes in TMON Inc. ("TMON"), an entity based in the Republic of Korea, in May 2015 and Groupon India in August 2015, we obtained minority investments in Monster Holdings LP ("Monster LP") and in Nearbuy Pte Ltd. ("Nearbuy"), respectively. We have made an irrevocable election to account for both of those investments at fair value with changes in fair value reported in earnings. We elected to apply fair value accounting to those investments because we believe that fair value is the most relevant measurement attribute for those investments, and to reduce operational and accounting complexity. Our election to apply fair value accounting to those investments has and may continue to cause fluctuations in our earnings from period to period.

We determined that the fair value of our investments in Monster LP and Nearbuy were $0.0 million and $4.9 million, respectively, as of June 30, 2019 and $69.4 million and $4.5 million, respectively, as of December 31, 2018.The following table summarizes gains and losses due to changes in fair value of those investments for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Monster LP	$	(27,949	)	$	(3,054	)	$	(69,408	)	$	(8,285	)
Nearbuy	372			19			423			217
Total	$	(27,577	)	$	(3,035	)	$	(68,985	)	$	(8,068	)

During the first quarter 2019, we recognized a $41.5 million loss from changes in the fair value of our investment in Monster LP due to the revised cash flow projections provided by TMON in March 2019 and an increase in the discount rate applied to those forecasts, which increased to 26.0% as of March 31, 2019, as compared with 21.0% as of December 31, 2018. The increase in the discount rate applied as of March 31, 2019 was due to the deterioration in the financial condition of TMON and the competitive environment in the Korean e-commerce industry, which resulted in an increase to financial projection risk. During the second quarter 2019, we recognized an additional loss of $27.9 million from changes in the fair value of our investment in Monster LP due to revised financial projections provided by TMON in June 2019. The revisions to the financial projections were made as a result of TMON’s continued underperformance as compared with prior projections along with adjustments to their business model.

The following table summarizes the condensed financial information for Monster LP for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Revenue	$	131,816		$	84,525		$	252,016		$	171,384
Gross profit	9,542			6,574			17,407			13,811
Loss before income taxes	(31,253		)	(35,447		)	(60,324		)	(68,867		)
Net loss	(31,253		)	(35,447		)	(60,324		)	(68,867		)

Other Equity Investments

Other equity investments represents equity investments without readily determinable fair values. We have elected to record equity investments without readily determinable fair values at cost adjusted for observable price changes and impairments. We recorded a $4.6 million impairment of an other equity investment for the three and six months ended June 30, 2018. That impairment is classified within Other income (expense), net on the condensed consolidated statements of operations. There were no other adjustments for observable price changes related to these investments since our adoption of ASU 2016-01, Financial Instruments (Topic 825-10) - Recognition and Measurement of Financial Assets and Financial Liabilities, on January 1, 2018.

12

GROUPON, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(unaudited)

4. SUPPLEMENTAL CONDENSED CONSOLIDATED BALANCE SHEETS AND STATEMENTS OF OPERATIONS INFORMATION

The following table summarizes other income (expense), net for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Interest income	$	1,915		$	1,836		$	3,851		$	3,345
Interest expense	(5,442		)	(5,228		)	(11,133		)	(10,721		)
Changes in fair value of investments	(27,577		)	(3,035		)	(68,985		)	(8,068		)
Foreign currency gains (losses), net	2,609			(12,533		)	930			(11,135		)
Impairments of investments	—			(9,189		)	—			(10,044		)
Other	1			1,692			(12		)	1,651
Other income (expense), net	$	(28,494	)	$	(26,457	)	$	(75,349	)	$	(34,972	)

The following table summarizes prepaid expenses and other current assets as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Merchandise inventories	$	29,235	$	33,739
Prepaid expenses	32,414		28,209
Income taxes receivable	6,693		6,717
Other	22,714		19,450
Total prepaid expenses and other current assets	$	91,056	$	88,115

The following table summarizes accrued merchant and supplier payables as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Accrued merchant payables	$	333,441	$	371,279
Accrued supplier payables (1)	130,684		280,502
Total accrued merchant and supplier payables	$	464,125	$	651,781

(1) Amounts include payables to suppliers of inventories and providers of shipping and fulfillment services.

13

GROUPON, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(unaudited)

The following table summarizes accrued expenses and other current liabilities as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Refunds reserve	$	19,812	$	27,957
Compensation and benefits	56,600		56,173
Accrued marketing	29,227		39,094
Customer credits	17,516		15,118
Income taxes payable	5,320		8,987
Deferred revenue	19,949		25,452
Current portion of lease obligations (1)	43,033		17,207
Other	67,153		77,046
Total accrued expenses and other current liabilities	$	258,610	$	267,034

(1) Current portion of lease obligations as of June 30, 2019 includes $25.0 million of additional lease obligations that were recognized on January 1, 2019 as a result of the adoption of Topic 842. Refer to Note 6, Leases, for additional information.

The following table summarizes other non-current liabilities as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Contingent income tax liabilities	$	32,756	$	39,858
Deferred rent (1)	—		32,186
Deferred income taxes	4,164		6,619
Other	16,820		22,025
Total other non-current liabilities	$	53,740	$	100,688

(1) Non-current operating lease liabilities as of June 30, 2019 are included within Operating lease obligations on the condensed consolidated balance sheet as a result of the adoption of Topic 842 on January 1, 2019. Refer to Note 6, Leases, for additional information.

5. FINANCING ARRANGEMENTS

Convertible Senior Notes

On April 4, 2016, we issued $250.0 million in aggregate principal amount of convertible senior notes (the "Notes") in a private placement to A-G Holdings, L.P. ("AGH"). Michael Angelakis, the chairman and chief executive officer of Atairos Group, Inc. ("Atairos"), joined our Board of Directors (the "Board") in connection with the issuance of the Notes. Atairos controls the voting power of AGH. The net proceeds from this offering were $243.2 million after deducting issuance costs. The Notes bear interest at a rate of 3.25% per annum, payable annually in arrears on April 1 of each year, beginning on April 1, 2017. The Notes will mature on April 1, 2022, subject to earlier conversion or redemption.

Each $1,000 of principal amount of the Notes initially is convertible into 185.1852 shares of common stock, which is equivalent to an initial conversion price of $5.40 per share, subject to adjustment upon the occurrence of specified events. Upon conversion, we can elect to settle the conversion value in cash, shares of our common stock, or any combination of cash and shares of our common stock. Holders of the Notes may convert their Notes at their option at any time until the close of business on the scheduled trading day immediately preceding the maturity date. In addition, if specified corporate events occur prior to the maturity date, we may be required to increase the conversion rate for holders who elect to convert based on the effective date of such event and the applicable stock price attributable to the event, as set forth in a table contained in the indenture governing the Notes (the "Indenture"). Based on the closing price of the common stock of $3.58 as of June 30, 2019, the if-converted value of the Notes was less than the principal amount.

With certain exceptions, upon a fundamental change (as defined in the Indenture), the holders of the Notes may require us to repurchase all or a portion of their Notes for cash at a purchase price equal to the principal amount plus accrued and unpaid interest. In addition, we may redeem the Notes, at our option, at a purchase price equal to the principal amount plus accrued and unpaid interest on or after April 1, 2020, if the closing sale price of the common stock exceeds 150% of the then-current conversion price for 20 or more trading days in the 30 consecutive trading-day period preceding the exercise of this redemption right.

The Notes are senior unsecured obligations that rank equal in right of payment to all senior unsecured indebtedness and rank senior in right of payment to any indebtedness that is contractually subordinated to the Notes.

The Indenture includes customary events of default. If an event of default, as defined in the Indenture, occurs and is continuing, the principal amount of the Notes and any accrued and unpaid interest may be declared immediately due and payable. In the case of bankruptcy or insolvency, the principal amount of the Notes and any accrued and unpaid interest would automatically become immediately due and payable.

We have separated the Notes into their liability and equity components in the accompanying condensed consolidated balance sheets. The carrying amount of the liability component was calculated by measuring the fair value of a similar liability that does not have an associated conversion feature. The carrying amount of the equity component, representing the conversion option, was determined by deducting the fair value of the liability component from the principal amount of the Notes. The difference between the principal amount of the Notes and the liability component (the "debt discount") is amortized to interest expense at an effective interest rate of 9.75% over the term of the Notes. The equity component of the Notes is included in additional paid-in capital in the condensed consolidated balance sheets and is not remeasured as long as it continues to meet the conditions for equity classification.

We incurred transaction costs of approximately $6.8 million related to the issuance of the Notes. Those transaction costs were allocated to the liability and equity components in the same manner as the allocation of the proceeds from the Notes. Transaction costs attributable to the liability component of $4.8 million were recorded as a debt discount in the condensed consolidated balance sheet and are being amortized to interest expense over the term of the Notes. Transaction costs attributable to the equity component of $2.0 million were recorded in stockholders' equity as a reduction of the equity component.

The carrying amount of the Notes consisted of the following as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019			December 31, 2018
Liability component:
Principal amount	$	250,000		$	250,000
Less: debt discount	(41,900		)	(48,331		)
Net carrying amount of liability component	$	208,100		$	201,669
Net carrying amount of equity component	$	67,014		$	67,014

The estimated fair value of the Notes as of June 30, 2019 and December 31, 2018 was $267.1 million and $257.1 million, and was determined using a lattice model. We classified the fair value of the Notes as a Level 3 measurement due to the lack of observable market data over fair value inputs such as our stock price volatility over the term of the Notes and our cost of debt.

As of June 30, 2019, the remaining term of the Notes is approximately 2 years and 9 months. During the three and six months ended June 30, 2019 and 2018, we recognized interest costs on the Notes as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Contractual interest (3.25% of the principal amount per annum)	$	2,032	$	2,032	$	4,064	$	4,064
Amortization of debt discount	3,256		2,940		6,431		5,806
Total	$	5,288	$	4,972	$	10,495	$	9,870

Note Hedges and Warrants

In May 2016, we purchased convertible note hedges with respect to our common stock for a cost of $59.1 million from certain bank counterparties. The convertible note hedges provide us with the right to purchase up to 46.3 million shares of our common stock at an initial strike price of $5.40 per share, which corresponds to the initial conversion price of the Notes, and are exercisable upon conversion of the Notes. The convertible note hedges are intended to reduce the potential economic dilution upon conversion of the Notes. The convertible note hedges are separate transactions and are not part of the terms of the Notes. Holders of the Notes do not have any rights with respect to the convertible note hedges.

In May 2016, we also sold warrants for total cash proceeds of $35.5 million to certain bank counterparties. The warrants provide the counterparties with the right to purchase up to 46.3 million shares of our common stock at a strike price of $8.50 per share. The warrants expire on various dates between July 1, 2022 and August 26, 2022 and are exercisable on their expiration dates. The warrants are separate transactions and are not part of the terms of the Notes or convertible note hedges. Holders of the Notes and convertible note hedges do not have any rights with respect to the warrants.

The amounts paid and received for the convertible note hedges and warrants were recorded in additional paid-in capital in the condensed consolidated balance sheets as of June 30, 2019 and December 31, 2018. The convertible note hedges and warrants are not remeasured as long as they continue to meet the conditions for equity classification. The amounts paid for the convertible note hedges are tax deductible over the term of the Notes, while the proceeds received from the warrants are not taxable. 

Under the if-converted method, the shares of common stock underlying the conversion option in the Notes are included in the diluted earnings per share denominator and the interest expense on the Notes, net of tax, is added to the numerator. However, upon conversion, there will be no economic dilution from the Notes, as exercise of the convertible note hedges eliminates any dilution from the Notes that would have otherwise occurred when the price of our common stock exceeds the conversion price. Taken together, the purchase of the convertible note hedges and sale of warrants are intended to offset any actual dilution from the conversion of the Notes and to effectively increase the overall conversion price from $5.40 to $8.50 per share.

Revolving Credit Agreement

In May 2019, we entered into a second amended and restated senior secured revolving credit agreement (the "2019 Credit Agreement") which provides for aggregate principal borrowings of up to $400.0 million and matures in May 2024. The 2019 Credit Agreement replaced our previous $250.0 million amended and restated credit agreement that was scheduled to mature in June 2019 (the "2016 Credit Agreement"). We recorded a liability for debt issuance costs of $2.3 million related to the 2019 Credit Agreement. Those costs will be amortized to interest expense over the term of the agreement.

Borrowings under the 2019 Credit Agreement bear interest, at our option, at a rate per annum equal to (a) an adjusted LIBO rate or (b) a customary base rate (with loans denominated in certain currencies bearing interest at rates specific to such currencies) plus an additional margin ranging between 0.50% and 2.00%. We are required to pay quarterly commitment fees ranging from 0.25% to 0.35% per annum of the average daily amount of unused commitments available under the 2019 Credit Agreement. The 2019 Credit Agreement also provides for the issuance of up to $75.0 million in letters of credit, provided that the sum of outstanding borrowings and letters of credit do not exceed the maximum funding commitment of $400.0 million.

The 2019 Credit Agreement is secured by substantially all of our tangible and intangible assets, including a pledge of 100% of the outstanding capital stock of substantially all of our direct and indirect domestic subsidiaries and 65% of the shares or equity interests of first-tier foreign subsidiaries and each U.S. entity whose assets substantially consist of capital stock and/or intercompany debt of one or more foreign subsidiaries, subject to certain exceptions. Certain of our domestic subsidiaries are guarantors under the 2019 Credit Agreement.

The 2019 Credit Agreement contains various customary restrictive covenants that limit our ability to, among other things: incur additional indebtedness; make dividend and other restricted payments, including share repurchases; enter into sale and leaseback transactions; make investments, loans or advances; grant or incur liens on assets; sell assets; engage in mergers, consolidations, liquidations or dissolutions; and engage in transactions with affiliates. The 2019 Credit Agreement requires us to maintain compliance with specified financial covenants, comprised of a minimum fixed charge coverage ratio, a maximum leverage ratio, a maximum senior secured leverage ratio and a minimum liquidity ratio, each as set forth in the 2019 Credit Agreement. We are also required to maintain, as of the last day of each fiscal quarter, unrestricted cash of at least $250.0 million, including $125.0 million in accounts held with lenders under the 2019 Credit Agreement or their affiliates. Non-compliance with these covenants may result in termination of the commitments under the 2019 Credit Agreement and any then outstanding borrowings may be declared due and payable immediately. We have the right to terminate the 2019 Credit Agreement or reduce the available commitments at any time.

As of June 30, 2019, we had no borrowings outstanding under the 2019 Credit Agreement and as of December 31, 2018, we had no borrowings outstanding under the 2016 Credit Agreement. As of June 30, 2019, we had outstanding letters of credit of $18.2 million under the 2019 Credit Agreement and as of December 31, 2018, we had outstanding letters of credit of $19.2 million under the 2016 Credit Agreement.

6. LEASES

Adoption of ASC Topic 842, Leases

On January 1, 2019, we adopted ASC Topic 842 using the modified retrospective transition method. Topic 842 requires the recognition of lease assets and liabilities for operating leases, in addition to the finance lease assets and liabilities previously recorded on our condensed consolidated balance sheets. Beginning on January 1, 2019, our condensed consolidated financial statements are presented in accordance with the revised policies, while prior period amounts are not adjusted and continue to be reported in accordance with our historical policies. The modified retrospective transition method required the cumulative effect, if any, of initially applying the guidance to be recognized as an adjustment to our accumulated deficit as of our adoption date. As a result of adopting Topic 842, we recognized additional lease assets and liabilities of $109.6 million as of January 1, 2019. The discount rate used to calculate that adjustment was the rate implicit in the lease, unless that rate was not readily determinable. For leases for which the rate was not readily determinable, the discount rate used was our incremental borrowing rate as of the adoption date, January 1, 2019. There was no cumulative effect adjustment to our accumulated deficit as a result of initially applying the guidance.

We elected the package of practical expedients permitted under the transition guidance within Topic 842, which allowed us to carry forward prior conclusions about lease identification, classification and initial direct costs for leases entered into prior to adoption of Topic 842. Additionally, we elected to not separate lease and non-lease components for all of our leases. For leases with a term of 12 months or less, we elected the short-term lease exemption, which allowed us to not recognize right-of-use assets or lease liabilities for qualifying leases existing at transition and new leases we may enter into in the future.

General Description of Leases

We have entered into various non-cancelable operating lease agreements for our offices and data centers and non-cancelable finance lease agreements for property and equipment. We classify leases at their commencement as either operating or finance leases and may receive renewal or expansion options, rent holidays and leasehold improvement or other incentives on certain lease agreements.

Our operating leases primarily consist of leases for real estate throughout the world with lease expirations between 2019 and 2026. These arrangements typically do not transfer ownership of the underlying asset as we do not assume, nor do we intend to assume, the risks and rewards of ownership. Our finance leases are related to purchases of property and equipment, primarily computer hardware, with expirations between 2019 and 2023.

14

GROUPON, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(unaudited)

We recognize a right-of-use asset and lease liability for all of our leases at the commencement of the lease. Lease liabilities are measured based on the present value of the minimum lease payments discounted by a rate determined as of the date of commencement. Right-of-use assets are measured based on the lease liability adjusted for any initial direct costs, prepaid rent, or lease incentives. Minimum lease payments made under operating and finance leases are apportioned between interest expense and a reduction of the related operating and finance lease obligations. The interest expense on operating leases is presented within Selling, general and administrative expense on the condensed consolidated statements of operations and the related operating lease obligation is presented within Accrued expenses and other current liabilities and Operating lease obligations on the condensed consolidated balance sheets. The interest expense on finance leases is presented within Other income (expense), net on the condensed consolidated statements of operations and the related finance lease obligation is presented within Accrued expenses and other current liabilities and Other non-current liabilities on the condensed consolidated balance sheets.

We have also subleased certain office facilities under operating lease agreements, with expirations between 2019 and 2026. We recognize sublease rentals on a straight-line basis over their respective lease terms.

The following summarizes right-of-use assets as of June 30, 2019 (in thousands):

	June 30, 2019
Right-of-use assets - operating leases	$	127,305
Right-of-use assets - finance leases (1)	35,201
Total right-of-use assets, gross	162,506
Less: accumulated depreciation and amortization	(25,572		)
Right-of-use assets, net	$	136,934

(1) Right-of-use assets for finance leases are included in Property, equipment and software, net on the condensed consolidated balance sheet.

Related Party Sublease Agreement

On December 28, 2016, we entered into a sublease for portions of our office space at 600 West Chicago to Uptake, Inc. ("Uptake"), a Lightbank LLC ("Lightbank") portfolio company. Eric Lefkofsky, our co-founder and Chairman of the Board, is a co-founder and owns a significant equity interest in Lightbank. The sublease was a market rate transaction on terms that we believe are no less favorable than would have been reached with an unrelated third party. The sublease extends through January 31, 2026 and the sublease rentals over the entire term total approximately $18.2 million. Pursuant to our related party transaction policy, our Audit Committee approved the sublease. We recognized income from the sublease of $0.5 million and $0.5 million for the three months ended June 30, 2019 and 2018, and $1.2 million and $1.0 million for the six months ended June 30, 2019 and 2018.

Significant Assumptions and Judgments

Significant judgment is required when determining whether a contract is or contains a lease. We review contracts to determine whether the language conveys the right to control the use of an identified asset for a period of time in exchange for consideration.

As discussed above, the present value of minimum lease payments is used in determining the value of our operating and finance leases. The discount rate used to calculate the present value for lease payments is the rate implicit in the lease, unless that rate cannot be readily determined. For leases in which the rate implicit in the lease is not readily determinable, the discount rate is our incremental borrowing rate, which is determined based on information available at lease commencement and is equal to the rate of interest that we would have to pay to borrow on a collateralized basis over a similar term in an amount equal to the lease payments in a similar economic environment. The discount rate used for our lease obligations as of June 30, 2019 and January 1, 2019 ranged from 1.5% to 6.9%. As of June 30, 2019, the weighted-average remaining lease term for our finance leases and operating leases was 2 years and 5 years. As of June 30, 2019, the weighted-average discount rate for our finance leases and operating leases was 5.1% and 5.6%.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(unaudited)

The following table summarizes our lease cost and sublease income for the three and six months ended June 30, 2019 (in thousands):

	Three Months Ended June 30, 2019			Six Months Ended June 30, 2019
Financing lease cost:
Amortization of right-of-use assets	$	5,999		$	12,755
Interest on lease liabilities	266			573
Total finance lease cost	6,265			13,328
Operating lease cost	8,737			17,211
Variable lease cost	1,825			3,909
Short-term lease cost	169			210
Sublease income, gross	(1,312		)	(2,624		)
Total lease cost	$	15,684		$	32,034

As of June 30, 2019, the future payments under finance leases and operating leases for each of the next five years and thereafter are as follows (in thousands):    

	Finance Leases			Operating Leases
Remaining in 2019	$	6,972		$	19,787
2020	8,971			35,994
2021	5,052			32,720
2022	715			31,962
2023	12			24,516
Thereafter	—			33,175
Total minimum lease payments	21,722			178,154
Less: Amount representing interest	(1,080		)	(24,761		)
Present value of net minimum lease payments	20,642			153,393
Less: Current portion of lease obligations	(11,166		)	(31,867		)
Total long-term lease obligations	$	9,476		$	121,526

As of June 30, 2019, the future amounts due under subleases for each of the next five years and thereafter are as follows (in thousands):

	Subleases
Remaining in 2019	$	2,603
2020	5,027
2021	5,065
2022	5,103
2023	4,385
Thereafter	4,891
Total future sublease income	$	27,074

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(unaudited)

The following table summarizes supplemental cash flow information on our leasing obligations for the six months ended June 30, 2019 (in thousands):

	Six Months Ended June 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$	573
Operating cash flows from operating leases	(13,145		)
Financing cash flows from finance leases	(12,628		)
Right-of-use assets obtained in exchange for lease liabilities:
Finance leases	2,872
Operating leases	17,853

7. COMMITMENTS AND CONTINGENCIES

Our purchase obligations as of June 30, 2019 did not materially change from the amounts set forth in our 2018 Annual Report on Form 10-K.

Legal Matters and Other Contingencies

From time to time, we are party to various legal proceedings incident to the operation of our business. For example, we currently are involved in proceedings brought by former employees and merchants, intellectual property infringement suits, customer lawsuits, consumer class actions and suits alleging, among other things, violations of state consumer protection or privacy laws.

In addition, third parties have from time to time claimed, and others may claim in the future, that we have infringed their intellectual property rights. We are subject to intellectual property disputes, including patent infringement claims, and expect that we will continue to be subject to intellectual property infringement claims as our services expand in scope and complexity. In the past, we have litigated such claims, and we are presently involved in several patent infringement and other intellectual property-related claims, including pending litigation or trademark disputes relating to, for example, our Goods category, some of which could involve potentially substantial claims for damages or injunctive relief. We may also become more vulnerable to third-party claims as laws such as the Digital Millennium Copyright Act are interpreted by the courts, and we become subject to laws in jurisdictions where the underlying laws with respect to the potential liability of online intermediaries are either unclear or less favorable. We believe that additional lawsuits alleging that we have violated patent, copyright or trademark laws will be filed against us. Intellectual property claims, whether meritorious or not, are time consuming and often costly to resolve, could require expensive changes in our methods of doing business or the goods we sell, or could require us to enter into costly royalty or licensing agreements.

We also are subject to consumer claims or lawsuits relating to alleged violations of consumer protection or privacy rights and statutes, some of which could involve potentially substantial claims for damages, including statutory or punitive damages. Consumer and privacy related claims or lawsuits, whether meritorious or not, could be time consuming, result in costly litigation, damage awards, fines and penalties, injunctive relief or increased costs of doing business through adverse judgment or settlement, or require us to change our business practices, sometimes in expensive ways.

We are also subject to, or in the future may become subject to, a variety of regulatory inquiries, audits, and investigations across the jurisdictions where we conduct our business, including, for example, inquiries related to consumer protection, employment matters and/or hiring practices, marketing practices, tax, unclaimed property and privacy rules and regulations. Any regulatory actions against us, whether meritorious or not, could be time consuming, result in costly litigation, damage awards, fines and penalties, injunctive relief or increased costs of doing business through adverse judgment or settlement, require us to change our business practices in expensive ways, require significant amounts of management time, result in the diversion of significant operational resources or otherwise harm our business.

We establish an accrued liability for loss contingencies related to legal and regulatory matters when the loss is both probable and reasonably estimable. Those accruals represent management's best estimate of probable losses and, in such cases, there may be an exposure to loss in excess of the amounts accrued. For certain of the matters described above, there are inherent and significant uncertainties based on, among other factors, the stage of the proceedings, developments in the applicable facts of law, or the lack of a specific damage claim. However, we believe that the amount of reasonably possible losses in excess of the amounts accrued for those matters would not have a material adverse effect on our business, condensed consolidated financial position, results of operations or cash flows. Our accrued liabilities for loss contingencies related to legal and regulatory matters may change in the future as a result of new developments, including, but not limited to, the occurrence of new legal matters, changes in the law or regulatory environment, adverse or favorable rulings, newly discovered facts relevant to the matter, or changes in the strategy for the matter. Regardless of the outcome, litigation and other regulatory matters can have an adverse impact on us because of defense and settlement costs, diversion of management resources and other factors.

Indemnifications

In connection with the disposition of our operations in Latin America in the first quarter of 2017, we recorded $5.4 million in indemnification liabilities for certain tax and other matters upon the closing of the transactions as an adjustment to the net loss on the dispositions within discontinued operations at their fair value. We estimated the indemnification liabilities using a probability-weighted expected cash flow approach. During the first quarter of 2019, we decreased our indemnification liabilities due to the expiration of certain indemnification obligations. The resulting benefit of $2.2 million is recorded within Income (loss) from discontinued operations on the condensed consolidated statement of operations for the six months ended June 30, 2019. Our remaining indemnification liabilities were $3.2 million as of June 30, 2019. We estimate that the total amount of obligations that are reasonably possible to arise under the indemnifications in excess of amounts accrued as of June 30, 2019 is approximately $13.3 million.

In the normal course of business to facilitate transactions related to our operations, we indemnify certain parties, including employees, lessors, service providers, merchants, and counterparties to investment agreements and asset and stock purchase agreements with respect to various matters. We have agreed to hold certain parties harmless against losses arising from a breach of representations or covenants, or other claims made against those parties. These agreements may limit the time within which an indemnification claim can be made and the amount of the claim. We are also subject to increased exposure to various claims as a result of our divestitures and acquisitions, particularly in cases where we are entering into new businesses in connection with such acquisitions. We may also become more vulnerable to claims as we expand the range and scope of our services and are subject to laws in jurisdictions where the underlying laws with respect to potential liability are either unclear or less favorable. In addition, we have entered into indemnification agreements with our officers, directors and underwriters, and our bylaws contain similar indemnification obligations that cover officers, directors, employees and other agents. 

Except as noted above, it is not possible to determine the maximum potential amount under these indemnification agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. Historically, any payments that we have made under these agreements have not had a material impact on the operating results, financial position or cash flows.

8. STOCKHOLDERS' EQUITY AND COMPENSATION ARRANGEMENTS

Common Stock

Pursuant to our restated certificate of incorporation, the Board has the authority to issue up to a total of 2,010,000,000 shares of common stock. Each holder of common stock is entitled to one vote per share on any matter that is submitted to a vote of stockholders. In addition, holders of our common stock will vote as a single class of stock on any matter that is submitted to a vote of stockholders.

Share Repurchase Program

In May 2018, the Board authorized us to repurchase up to $300.0 million of our common stock under our share repurchase program. During the three and six months ended June 30, 2019, we repurchased 4,228,148 and 8,636,143 shares for an aggregate purchase price of $15.1 million and $30.1 million (including fees and commissions) under our

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(unaudited)

repurchase program. As of June 30, 2019, up to $260.0 million of common stock remained available for purchase under our program. The timing and amount of share repurchases, if any, will be determined based on market conditions, limitations under the 2019 Credit Agreement, share price and other factors, and the share repurchase program may be terminated at any time.

Groupon, Inc. Stock Plans

In January 2008, we adopted the 2008 Stock Option Plan, as amended (the "2008 Plan"), under which options for up to 64,618,500 shares of common stock were authorized to be issued to employees, consultants and directors. The 2008 Plan was frozen in December 2010. In April 2010, we established the Groupon, Inc. 2010 Stock Plan, as amended in April 2011 (the "2010 Plan"), under which options and restricted stock units ("RSUs") for up to 20,000,000 shares of common stock were authorized for future issuance to employees, consultants and directors. No new awards may be granted under the 2010 Plan following our initial public offering in November 2011. In August 2011, we established the Groupon, Inc. 2011 Incentive Plan (the "2011 Plan"), as amended in November 2013, May 2014, June 2016 and June 2019, under which options, RSUs and performance stock units for up to 187,500,000 shares of common stock were authorized for future issuance to employees, consultants and directors.

The Groupon, Inc. Stock Plans (the "Plans") are administered by the Compensation Committee of the Board (the "Compensation Committee"). As of June 30, 2019, 64,223,134 shares of common stock were available for future issuance under the Plans.

The stock-based compensation expense related to stock awards issued under the Plans and acquisition-related awards are presented within the following line items of the condensed consolidated statements of operations for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Cost of revenue	$	380	$	288	$	758	$	684
Marketing	1,490		1,763		2,915		3,557
Selling, general and administrative	24,693		14,215		39,301		31,303
Other income (expense), net	—		52		—		100
Total stock-based compensation expense	$	26,563	$	16,318	$	42,974	$	35,644

We capitalized $2.2 million and $2.0 million of stock-based compensation for the three months ended June 30, 2019 and 2018, and $3.5 million and $3.7 million for the six months ended June 30, 2019 and 2018 in connection with internally-developed software and cloud computing arrangements.

Employee Stock Purchase Plan

The Groupon, Inc. 2012 Employee Stock Purchase Plan ("ESPP"), as amended in June 2019, authorizes us to grant up to 20,000,000 shares of common stock under that plan. For the six months ended June 30, 2019 and 2018, 719,297 and 746,773 shares of common stock were issued under the ESPP.

Restricted Stock Units

The restricted stock units granted under the Plans generally have vesting periods between one and four years and are amortized on a straight-line basis over their requisite service period. Additionally, we are required to issue restricted stock units to settle amounts that exceed targeted bonus amounts under our primary bonus plans. We account for those obligations, if any, as liability-classified awards with performance conditions.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(unaudited)

The table below summarizes restricted stock unit activity under the Plans for the six months ended June 30, 2019:

	Restricted Stock Units		Weighted-Average Grant Date Fair Value (per unit)
Unvested at December 31, 2018	26,623,432		$	4.47
Granted	22,723,241		3.25
Vested	(7,787,055	)	4.45
Forfeited	(6,264,854	)	4.27
Unvested at June 30, 2019	35,294,764		3.92

As of June 30, 2019, $118.4 million of unrecognized compensation costs related to unvested restricted stock units are expected to be recognized over a remaining weighted-average period of 1.65 years.

Performance Share Units

We grant performance share units under the Plans that vest in shares of our common stock upon the achievement of financial and operational targets specified in the respective award agreement ("Performance Share Units"). During the six months ended June 30, 2019, we also granted performance share units that will vest if our average daily closing stock price is equal to or greater than $6.00 per share over a period of 30 consecutive trading days prior to December 31, 2022 or if a change in control occurs during the performance period at the specified stock price (and on a proportional basis for a change in control price between the grant date price and the specified stock price) ("Market-based Performance Share Units"). We determined these awards are subject to a market condition, and therefore we used a Monte Carlo simulation to calculate the grant date fair value of the awards and the related derived service period over which we will recognize the expense. The key inputs used in the Monte Carlo simulation were the risk-free rate, our volatility of 49.8% and our cost of equity of 12.8%.

All of our performance share awards are subject to both continued employment through the performance period dictated by the award and certification by the Compensation Committee that the specified performance conditions have been achieved.

The table below summarizes Performance Share Unit activity under the Plans for the six months ended June 30, 2019:

	Performance Share Units		Weighted-Average Grant Date Fair Value (per unit)		Market-based Performance Share Units	Weighted-Average Grant Date Fair Value (per unit)
Unvested at December 31, 2018	3,431,918		$	4.90	—	$	—
Granted	4,622,995		3.44		8,486,708	3.03
Vested	(777,573	)	4.88		—	—
Forfeited	(2,613,788	)	4.71		—	—
Unvested at June 30, 2019	4,663,552		3.56		8,486,708	3.03
Maximum shares issuable upon vesting at June 30, 2019	8,903,280				8,486,708

As of June 30, 2019, $15.8 million of unrecognized compensation costs related to unvested performance share units are expected to be recognized over a remaining weighted-average period of 1.94 years and $16.7 million of unrecognized compensation costs related to unvested market-based performance share units are expected to be recognized over a remaining weighted-average period of 0.66 years.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(unaudited)

Stock Options

The exercise price of stock options granted is equal to the fair value of the underlying stock on the date of grant. The contractual term for stock options expires ten years from the grant date. Stock options generally vest over a three- or four-year period, with 25% of the awards vesting after one year and the remainder of the awards vesting on a monthly or quarterly basis thereafter. We did not grant any stock options during the six months ended June 30, 2019.

The table below summarizes stock option activity for the six months ended June 30, 2019:

	Options		Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands) (1)
Outstanding and exercisable at December 31, 2018	212,787		$	1.80	1.37	$	298
Exercised	(42,500	)	0.96
Outstanding and exercisable at June 30, 2019	170,287		$	1.95	0.92	$	278

(1) The aggregate intrinsic value of options outstanding and exercisable represents the total pretax intrinsic value (the difference between the fair value of our stock on the last day of each period and the exercise price, multiplied by the number of options where the fair value exceeds the exercise price) that would have been received by the option holders had all option holders exercised their options as of June 30, 2019 and December 31, 2018.

9. REVENUE RECOGNITION

Refer to Note 13, Segment Information, for revenue summarized by reportable segment and category for the three and six months ended June 30, 2019 and 2018.

Contract Balances

A substantial majority of our deferred revenue relates to product sales for which revenue will be recognized as the products are delivered to customers, generally within one week following the balance sheet date. Our deferred revenue was $19.9 million and $25.5 million as of June 30, 2019 and December 31, 2018. The amount of revenue recognized for the six months ended June 30, 2019 that was included in the deferred revenue balance at the beginning of the period was $25.4 million.

The following table summarizes the activity in the liability for customer credits for the six months ended June 30, 2019 (in thousands):

	Customer Credits
Balance as of December 31, 2018	$	15,118
Credits issued	56,477
Credits redeemed (1)	(49,928		)
Breakage revenue recognized	(4,177		)
Foreign currency translation	26
Balance as of June 30, 2019	$	17,516

(1) Customer credits can be redeemed through our online marketplaces for goods or services provided by a third-party merchant or for merchandise inventory sold by us. When customer credits are redeemed for goods or services provided by a third-party merchant, service revenue is recognized on a net basis as the difference between the carrying amount of the customer credit liability derecognized and the amount due to the merchant for the related transaction. When customer credits are redeemed for merchandise inventory sold by us, product revenue is recognized on a gross basis equal to the amount of the customer credit liability derecognized. Customer credits are typically used within one year of issuance.

Costs of Obtaining Contracts

Incremental costs to obtain contracts with third-party merchants, such as sales commissions, are deferred and recognized over the expected period of the merchant arrangement, generally from 12 to 18 months. Those costs are

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(unaudited)

classified within Selling, general and administrative expense in the condensed consolidated statements of operations. As of June 30, 2019 and December 31, 2018, we had deferred contract acquisition costs of $2.6 million and $2.9 million, respectively, recorded within Prepaid expenses and other current assets, and $10.2 million and $11.3 million, respectively, recorded within Other non-current assets. We amortized $5.1 million and $6.5 million of deferred contract acquisition costs during the three months ended June 30, 2019 and 2018, and $10.5 million and $13.3 million for the six months ended June 30, 2019 and 2018. We did not recognize any impairment losses in relation to the deferred costs.

Variable Consideration for Unredeemed Vouchers

In our International segment and, to a lesser extent, in our North America segment, our merchant agreements have redemption payment terms, under which the merchant is not paid its share of the sale price for a voucher sold through one of our online marketplaces until the customer redeems the related voucher. If the customer does not redeem a voucher with such merchant payment terms, we retain all of the gross billings for that voucher, rather than retaining only our net commission. We estimate the variable consideration from vouchers that will not ultimately be redeemed using our historical voucher redemption experience and recognize that amount as revenue at the time of sale. We only recognize amounts in variable consideration when we believe it is probable that a significant reversal of revenue will not occur in future periods, which requires us to make significant estimates of future redemptions. If actual redemptions differ from our estimates, the effects could be material to the condensed consolidated financial statements. As of June 30, 2019 and December 31, 2018, we constrained $15.3 million and $13.7 million in revenue from unredeemed vouchers that we may recognize in future periods when we determine it is probable that a significant amount of that revenue will not be subsequently reversed.

10. INCOME TAXES

Our income tax provision for interim periods is determined using an estimate of our annual effective tax rate, adjusted for discrete items.

For the three months ended June 30, 2019, we recorded an income tax expense from continuing operations of $2.0 million on a pretax loss from continuing operations of $35.6 million. For the three months ended June 30, 2018, we recorded an income tax expense from continuing operations of $1.6 million on a pretax loss from continuing operations of $90.7 million. For the six months ended June 30, 2019, we recorded an income tax benefit from continuing operations of $1.5 million on a pretax loss from continuing operations of $80.3 million. For the six months ended June 30, 2018, we recorded an income tax benefit from continuing operations of $0.8 million on a pretax loss from continuing operations of $95.8 million.

Our U.S. Federal income tax rate is 21%. The primary factor impacting the effective tax rate for the three and six months ended June 30, 2019 and 2018 was the pretax losses incurred in jurisdictions that have valuation allowances against their net deferred tax assets. We expect that our consolidated effective tax rate in future periods will continue to differ significantly from the U.S. federal income tax rate as a result of our tax obligations in jurisdictions with profits and valuation allowances in jurisdictions with losses. The effective tax rate for the six months ended June 30, 2019 also reflected the reversal of reserves for uncertain tax positions due to the closure of a tax audit. The effective tax rate for the six months ended June 30, 2018 also reflected a $6.4 million income tax benefit resulting from the impact of Accounting Standards Codification Topic 606, Revenue from Contracts with Customers ("Topic 606") on intercompany activity in certain foreign jurisdictions.

We are currently undergoing income tax audits in multiple jurisdictions. It is likely that the examination phase of some of those audits will conclude in the next 12 months. There are many factors, including factors outside of our control, which influence the progress and completion of those audits. We are subject to claims for tax assessments by foreign jurisdictions, including a proposed assessment for $109.9 million. We believe that the assessment, which primarily relates to transfer pricing on transactions occurring in 2011, is without merit and we intend to vigorously defend ourselves in that matter. In addition to any potential increases in our liabilities for uncertain tax positions from the ultimate resolution of that assessment, we believe that it is reasonably possible that reductions of up to $21.0 million in unrecognized tax benefits may occur within the 12 months following June 30, 2019 upon closing of income tax audits or the expiration of applicable statutes of limitations.

In general, it is our practice and intention to reinvest the earnings of our non-U.S. subsidiaries in those operations. Additionally, while we did not incur the deemed repatriation tax, an actual repatriation from our non-U.S. subsidiaries could be subject to foreign and U.S. state income taxes. Aside from limited exceptions for which the related deferred tax liabilities recognized as of June 30, 2019 and December 31, 2018 are immaterial, we do not intend to distribute earnings of foreign subsidiaries for which we have an excess of the financial reporting basis over the tax basis of our investments and therefore have not recorded any deferred taxes related to such amounts. The actual tax cost resulting from a distribution would depend on income tax laws and circumstances at the time of distribution. Determination of the amount of unrecognized deferred tax liability related to the excess of the financial reporting basis over the tax basis of our foreign subsidiaries is not practical due to the complexities associated with the calculation.

Groupon uses a cost-sharing arrangement under which controlled members agree to share the costs and risks of developing intangible properties in accordance with their reasonably anticipated share of benefits from the intangibles. On July 24, 2018, the Ninth Circuit Court of Appeals issued an opinion in Altera Corp. v. Commissioner requiring related parties in an intercompany cost-sharing arrangement to share expenses related to stock-based compensation. This opinion reversed an earlier decision of the United States Tax Court. On August 7, 2018, the Ninth Circuit Court of Appeals withdrew its July 24, 2018 opinion. On June 7, 2019, the United States Court of Appeals for the Ninth Circuit reversed the Tax Court decision and ruled that stock-based compensation must be included in the shared pool of expenses. We do not expect that the ruling will have a material net impact on our provision for income taxes for the year ending December 31, 2019 due to the valuation allowances against our net deferred tax assets in the related jurisdictions.

11. FAIR VALUE MEASUREMENTS

Fair value is defined under U.S. GAAP as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or a liability.

To increase the comparability of fair value measures, the following hierarchy prioritizes the inputs in valuation methodologies used to measure fair value:

Level 1 - Measurements that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets.

Level 2 - Measurements that include other inputs that are directly or indirectly observable in the marketplace.

Level 3 - Measurements derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable. These fair value measurements require significant judgment.

In determining fair value, we use various valuation approaches within the fair value measurement framework. The valuation methodologies used for our assets and liabilities measured at fair value and their classification in the valuation hierarchy are summarized below:

Fair value option investments and available-for-sale securities. To determine the fair value of our fair value option investments each period, we first estimate the fair value of each entity in its entirety. We primarily use the discounted cash flow method, which is an income approach, to estimate the fair value of the entities. The key inputs to determining fair values under that approach are cash flow forecasts and discount rates. We also use a market approach valuation technique, which is based on market multiples of guideline companies, to determine the fair value of each entity. The discounted cash flow and market multiple valuations are then evaluated and weighted to determine the amount that is most representative of the fair value of each entity. Once we determine the fair value of each entity, we then determine the fair value of our specific investments in those entities. The entities have complex capital structures, so we apply an option-pricing model that considers the liquidation preferences of each entity's respective classes of ownership interests to determine the fair value of our investment in each entity.

We also have investments in redeemable preferred shares and had investments in convertible debt securities issued by nonpublic entities. We measure the fair value of those available-for-sale securities using the

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(unaudited)

discounted cash flow method.

We have classified our fair value option investments and our investments in available-for-sale securities as Level 3 due to the lack of observable market data over fair value inputs such as cash flow projections and discount rates. Increases in projected cash flows and decreases in discount rates contribute to increases in the estimated fair values of the fair value option investments and available-for-sale securities, whereas decreases in projected cash flows and increases in discount rates contribute to decreases in their fair values.

Contingent consideration. We are subject to a contingent consideration arrangement to transfer a maximum payout in cash of $2.5 million to the former owners of a business acquired on April 30, 2018.

Liabilities for contingent consideration are measured at fair value each reporting period, with the acquisition-date fair value included as part of the consideration transferred in the related business combination and subsequent changes in fair value recorded in earnings within Selling, general and administrative expense on the condensed consolidated statements of operations.

We use an income approach to value contingent consideration obligations based on the present value of probability-weighted future cash flows. We classify the contingent consideration liabilities as Level 3 due to the lack of relevant observable market data over fair value inputs such as probability-weighting of payment outcomes.

The following tables summarize assets that are measured at fair value on a recurring basis as of June 30, 2019 and December 31, 2018 (in thousands):

			Fair Value Measurement at Reporting Date Using
	June 30, 2019		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Fair value option investments	$	4,917	$	—	$	—	$	4,917
Available-for-sale securities - redeemable preferred shares	10,201		—		—		10,201
Liabilities:
Contingent consideration	1,239		—		—		1,239

			Fair Value Measurement at Reporting Date Using
	December 31, 2018		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Fair value option investments	$	73,902	$	—	$	—	$	73,902
Available-for-sale securities - redeemable preferred shares	10,340		—		—		10,340
Liabilities:
Contingent consideration	1,529		—		—		1,529

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(unaudited)

The following table provides a rollforward of the fair value of recurring Level 3 fair value measurements for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Assets
Fair value option investments:
Beginning Balance	$	32,494		$	77,933		$	73,902		$	82,966
Total gains (losses) included in earnings	(27,577		)	(3,035		)	(68,985		)	(8,068		)
Ending Balance	$	4,917		$	74,898		$	4,917		$	74,898
Unrealized gains (losses) still held (1)	$	(27,577	)	$	(3,035	)	$	(68,985	)	$	(8,068	)
Available-for-sale securities
Convertible debt securities:
Beginning Balance	$	—		$	11,070		$	—		$	11,354
Transfer to other equity investment upon conversion of convertible debt security	—			(2,508		)	—			(2,508		)
Total gains (losses) included in other comprehensive income (loss)	—			(541		)	—			(1,042		)
Total gains (losses) included in earnings (2)	—			2,215			—			2,432
Ending Balance	$	—		$	10,236		$	—		$	10,236
Unrealized gains (losses) still held (1)	$	—		$	2,599		$	—		$	2,405
Redeemable preferred shares:
Beginning Balance	$	10,394		$	14,576		$	10,340		$	15,431
Total gains (losses) included in other comprehensive income (loss)	(193		)	—			(139		)	—
Impairments included in earnings	—			(4,615		)	—			(5,470		)
Ending Balance	$	10,201		$	9,961		$	10,201		$	9,961
Unrealized gains (losses) still held (1)	$	(193	)	$	(4,615	)	$	(139	)	$	(5,470	)
Liabilities
Contingent Consideration:
Beginning Balance	$	1,586		$	—		$	1,529		$	—
Issuance of contingent consideration in connection with acquisition	—			1,589			—			1,589
Settlements of contingent consideration liabilities	(312		)	—			(312		)	—
Total losses (gains) included in earnings	5			14			27			14
Foreign currency translation	(40		)	(61		)	(5		)	(61		)
Ending Balance	$	1,239		$	1,542		$	1,239		$	1,542
Unrealized gains (losses) still held (1)	$	5		$	(47	)	$	27		$	(47	)

(1) Represents the unrealized gains or losses recorded in earnings and/or other comprehensive income (loss) during the period for assets and liabilities classified as Level 3 that are still held (or outstanding) at the end of the period.

(2) Represents a gain at maturity of a previously impaired convertible debt security, accretion of interest income and changes in the fair value of an embedded derivative.

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Certain assets and liabilities are measured at fair value on a nonrecurring basis, including assets that are written down to fair value as a result of an impairment. We did not record any significant nonrecurring fair value measurements after initial recognition for the three and six months ended June 30, 2019. During the three months ended June 30, 2018, we recorded a $4.6 million impairment of an other equity investment. To determine the fair value of the investment, we considered the financial condition of the investee and applied a market approach. We classified the fair value measurement of that other equity investment as Level 3 because it involves significant unobservable inputs. We did not record any other nonrecurring fair value measurements after initial recognition for the three and six

23

GROUPON, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(unaudited)

months ended June 30, 2018.

Estimated Fair Value of Financial Assets and Liabilities Not Measured at Fair Value

Our financial instruments not carried at fair value consist primarily of accounts receivable, restricted cash, accounts payable, accrued merchant and supplier payables and accrued expenses. The carrying values of those assets and liabilities approximate their respective fair values as of June 30, 2019 and December 31, 2018 due to their short-term nature.

12. INCOME (LOSS) PER SHARE

Basic net income (loss) per share is computed using the weighted-average number of common shares outstanding during the period. Diluted net income (loss) per share is computed using the weighted-average number of common shares and the effect of potentially dilutive securities outstanding during the period. Potentially dilutive securities include stock options, restricted stock units, performance share units, ESPP shares, warrants and convertible senior notes. If dilutive, those potentially dilutive securities are reflected in diluted net income (loss) per share by application of the treasury stock method, except for the convertible senior notes, which are subject to the if-converted method.

The following table sets forth the computation of basic and diluted net income (loss) per share of common stock for the three and six months ended June 30, 2019 and 2018 (in thousands, except share and per share amounts):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Basic and diluted net income (loss) per share:
Numerator
Net income (loss) - continuing operations	$	(37,645	)	$	(92,254	)	$	(78,815	)	$	(95,049	)
Less: Net income (loss) attributable to noncontrolling interests	2,601			2,780			6,080			6,873
Net income (loss) attributable to common stockholders - continuing operations	(40,246		)	(95,034		)	(84,895		)	(101,922		)
Net income (loss) attributable to common stockholders - discontinued operations	—			—			2,162			—
Net income (loss) attributable to common stockholders	$	(40,246	)	$	(95,034	)	$	(82,733	)	$	(101,922	)
Denominator
Weighted-average common shares outstanding	567,962,461			565,284,705			569,014,065			563,502,954
Basic and diluted net income (loss) per share:
Continuing operations	$	(0.07	)	$	(0.17	)	$	(0.15	)	$	(0.18	)
Discontinued operations	0.00			0.00			0.01			0.00
Basic and diluted net income (loss) per share	$	(0.07	)	$	(0.17	)	$	(0.14	)	$	(0.18	)

The following weighted-average potentially dilutive instruments are not included in the diluted net income (loss) per share calculations above because they would have had an antidilutive effect on the net income (loss) per share from continuing operations:

	Three Months Ended June 30,		Six Months Ended June 30,
	2019	2018	2019	2018
Restricted stock units	37,031,941	32,602,563	32,060,396	30,378,335
Other stock-based compensation awards	1,581,255	1,615,249	1,667,000	2,413,637
Convertible senior notes	46,296,300	46,296,300	46,296,300	46,296,300
Warrants	46,296,300	46,296,300	46,296,300	46,296,300
Total	131,205,796	126,810,412	126,319,996	125,384,572

24

GROUPON, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(unaudited)

We had outstanding performance share units as of June 30, 2019 and 2018 that were eligible to vest into shares of common stock subject to the achievement of specified performance conditions. Contingently issuable shares are excluded from the computation of diluted earnings per share if, based on current period results, the shares would not be issuable if the end of the reporting period were the end of the contingency period. There were up to 16,966,170 and 7,706,474 shares of common stock issuable upon vesting of outstanding performance share units as of June 30, 2019 and 2018 that were excluded from the table above as the performance conditions were not satisfied as of the end of the respective periods.

13. SEGMENT INFORMATION

The segment information reported in the tables below reflects the operating results that are regularly reviewed by our chief operating decision maker to assess performance and make resource allocation decisions. Our operations are organized into two segments: North America and International.

The following table summarizes revenue by reportable segment and category for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
North America
Service revenue:
Local	$	177,082	$	185,870	$	357,459	$	373,281
Goods	3,714		3,796		6,841		8,670
Travel	16,125		19,888		35,066		39,972
Product revenue - Goods	127,739		170,710		282,459		351,597
Total North America revenue (1)	324,660		380,264		681,825		773,520
International
Service revenue:
Local	69,995		71,425		143,185		146,003
Goods	2,610		4,967		4,065		8,381
Travel	8,077		9,706		16,814		21,142
Product revenue - Goods	127,235		151,034		265,098		294,890
Total International revenue (1)	$	207,917	$	237,132	$	429,162	$	470,416

(1) North America includes revenue from the United States of $319.2 million and $371.1 million for the three months ended June 30, 2019 and 2018 and $668.0 million and $756.5 million for the six months ended June 30, 2019 and 2018. International includes revenue from the United Kingdom of $71.3 million and $91.5 million for the three months ended June 30, 2019 and 2018 and $152.4 million and $174.5 million for the six months ended June 30, 2019 and 2018. There were no other individual countries that represented more than 10% of consolidated total revenue for the three and six months ended June 30, 2019 and 2018. Revenue is attributed to individual countries based on the location of the customer.

25

GROUPON, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(unaudited)

The following table summarizes gross profit by reportable segment and category for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
North America
Service gross profit:
Local	$	157,673	$	165,285	$	318,755	$	332,041
Goods	2,995		2,990		5,558		6,931
Travel	12,806		16,303		28,074		32,305
Product gross profit - Goods	25,110		34,793		55,999		67,774
Total North America gross profit	198,584		219,371		408,386		439,051
International
Service gross profit:
Local	65,780		67,360		134,758		137,575
Goods	2,384		4,565		3,652		7,652
Travel	7,370		8,919		15,411		19,570
Product gross profit - Goods	18,014		23,443		35,941		44,695
Total International gross profit	$	93,548	$	104,287	$	189,762	$	209,492

The following table summarizes operating income (loss) by reportable segment for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Operating income (loss) (1) (2) (3):
North America	$	(372	)	$	(68,524	)	$	4,964		$	(70,384	)
International	(6,767		)	4,279			(9,908		)	9,524
Total operating income (loss)	$	(7,139	)	$	(64,245	)	$	(4,944	)	$	(60,860	)

(1) Includes stock-based compensation of $24.1 million and $15.0 million for North America and $2.5 million and $1.3 million for International for the three months ended June 30, 2019 and 2018 and $38.9 million and $32.9 million for North America and $4.1 million and $2.7 million for International for the six months ended June 30, 2019 and 2018.

(2) Includes acquisition-related (benefit) expense, net of $0.7 million for International for the three and six months ended June 30, 2018.

(3) Includes a $75.0 million charge recognized in the second quarter of 2018 to increase the accrual for the IBM patent litigation matter for North America for the three and six months ended June 30, 2018.

The following table summarizes total assets by reportable segment as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Total assets:
North America (1)	$	895,928	$	958,412
International (1)	543,280		683,730
Consolidated total assets	$	1,439,208	$	1,642,142

(1) North America contains assets from the United States of $870.6 million and $940.5 million as of June 30, 2019 and December 31, 2018. International contains assets from Ireland of $204.6 million as of December 31, 2018. Assets from Ireland were less than 10% of consolidated total assets as of June 30, 2019. There were no other individual countries that represented more than 10% of consolidated total assets as of June 30, 2019 and December 31, 2018.

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ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis of our financial condition and results of operations should be read together with our condensed consolidated financial statements and related notes included under Part I, Item 1 of this Quarterly Report on Form 10-Q. This discussion contains forward-looking statements about our business and operations. Our actual results may differ materially from those we currently anticipate as a result of many factors, including those we describe under Risk Factors and elsewhere in this Quarterly Report. See Part I, Financial Information, Forward-Looking Statements, for additional information.

Overview

Groupon operates online local commerce marketplaces in 15 countries that connect merchants to consumers by offering goods and services, generally at a discount. Consumers access those marketplaces through our websites, primarily localized groupon.com sites in many countries, and our mobile applications. Traditionally, local merchants have tried to reach consumers and generate sales through a variety of methods, including online advertising, paid telephone directories, direct mail, newspaper, radio, television and other promotions. By bringing the brick and mortar world of local commerce onto the Internet, Groupon is helping local merchants to attract customers and sell goods and services. We provide consumers with savings and help them discover what to do, eat, see, buy and where to travel.

Our operations are organized into two segments: North America and International. For the six months ended June 30, 2019, we derived 61.4% of our revenue from our North America segment and 38.6% of our revenue from our International segment. See Item 1, Note 13, Segment Information, for additional information. We offer goods and services through our online marketplaces in three primary categories: Local, Goods and Travel.

We generate both product and service revenue from our business operations. Our product revenue from transactions in which we sell merchandise inventory in our Goods category is the purchase price received from the customer. Our service revenue from transactions in which we earn commissions by selling goods or services on behalf of third-party merchants is the purchase price collected from the customer less the portion of the purchase price paid to the merchant.

Our focus is on driving long-term gross profit growth by enhancing the customer experience, establishing Groupon as an open platform, continuing to realize our international potential and maintaining a culture of operational efficiency. We have developed and are testing a number of product enhancements intended to make our offerings easier to use for both customers and merchants and to improve purchase frequency, including cash back offers linked to customer credit cards, booking capabilities and a paid membership program in North America, Groupon Select, which offers greater discounts on our offerings and other benefits. We have also entered into commercial agreements with third parties that enable us to feature additional merchant offerings through our marketplaces and for our inventory to be distributed through other marketplaces. We maintain a long-term focus on driving International to achieve gross profit that is more comparable to that of North America. Our initiatives to grow International include increasing our marketing spend and leveraging enhanced marketing analytics, investing more technology resources toward expanding product and service offerings, and growing our inventory of deal offerings. While we expect to invest in our key initiatives, we will continue to do so as disciplined operators and seek opportunities to improve our efficiency.

How We Measure Our Business

We use several financial and operating metrics to assess the progress of our business and make decisions on where to allocate capital, time and technology investments. Certain of the financial metrics are reported in accordance with U.S. GAAP and certain of those metrics are considered non-GAAP financial measures. As our business evolves, we may make changes to the key financial and operating metrics that we use to measure our business. For further information and reconciliations to the most applicable financial measures under U.S. GAAP, refer to our discussion under Non-GAAP Financial Measures in the Results of Operations section.

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Financial Metrics

• Revenue is earned through product and service revenue transactions. We earn product revenue from direct sales of merchandise inventory in our Goods category and report product revenue on a gross basis as the purchase price received from the customer. We earn service revenue from transactions in which we generate commissions by selling goods or services on behalf of third-party merchants, primarily through sales of vouchers and similar transactions in which we collect the transaction price from the customer and remit a portion of that transaction price to the third-party merchant who will provide the related goods or services. We report service revenue from those transactions on a net basis as the purchase price collected from the customer less the portion of the purchase price that is payable to the third-party merchant. Service revenue also includes commissions we earn when customers make purchases with retailers using digital coupons accessed through our websites and mobile applications and from voucherless merchant offerings in which customers earn cash back on their credit card statements when they transact with third-party merchants.

• Gross profit reflects the net margin we earn after deducting our cost of revenue from our revenue. Due to the lack of comparability between product revenue, which is reported on a gross basis, and service revenue, which primarily consists of transactions reported on a net basis, we believe that gross profit is an important measure for evaluating our performance.

• Adjusted EBITDA is a non-GAAP financial measure that we define as net income (loss) from continuing operations excluding income taxes, interest and other non-operating items, depreciation and amortization, stock-based compensation, acquisition-related expense (benefit), net and other special charges and credits, including items that are unusual in nature or infrequently occurring. For further information and a reconciliation to Income (loss) from continuing operations, refer to our discussion under Non-GAAP Financial Measures in the Results of Operations section.

• Free cash flow is a non-GAAP financial measure that comprises net cash provided by (used in) operating activities from continuing operations less purchases of property and equipment and capitalized software. For further information and a reconciliation to Net cash provided by (used in) operating activities from continuing operations, refer to our discussion in the Liquidity and Capital Resources section.

The following table presents the above financial metrics for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,					Six Months Ended June 30,
	2019			2018		2019			2018
Revenue	$	532,577		$	617,396	$	1,110,987		$	1,243,936
Gross profit	292,132			323,658		598,148			648,543
Adjusted EBITDA	46,521			56,231		93,476			108,838
Free cash flow	(17,903		)	26,802		(182,863		)	(113,089		)

Operating Metrics

• Gross billings is the total dollar value of customer purchases of goods and services. Gross billings is presented net of customer refunds, order discounts and sales and related taxes. The substantial majority of our service revenue transactions are comprised of sales of vouchers and similar transactions in which we collect the transaction price from the customer and remit a portion of the transaction price to the third-party merchant who will provide the related goods or services. For these transactions, gross billings differs from revenue reported in our condensed consolidated statements of operations, which is presented net of the merchant's share of the transaction price. For product revenue transactions, gross billings are equivalent to product revenue reported in our condensed consolidated statements of operations. Gross billings is an indicator of our growth and business performance as it measures the dollar volume of transactions generated through our marketplaces. Tracking gross billings on service revenue transactions also allows us to monitor the percentage of gross billings that we are able to retain after payments to merchants. However, management is primarily focused on optimizing the business for long-term gross profit and Adjusted EBITDA growth.

• Active customers are unique user accounts that have made a purchase during the trailing twelve months ("TTM") either through one of our online marketplaces or directly with a merchant for which we earned a commission. We consider this metric to be an important indicator of our business performance as it helps us

28

to understand how the number of customers actively purchasing our offerings is trending. Some customers could establish and make purchases from more than one account, so it is possible that our active customer metric may count certain customers more than once in a given period. For entities that we have acquired in a business combination, this metric includes active customers of the acquired entity, including customers who made purchases prior to the acquisition. We do not include consumers who solely make purchases with retailers using digital coupons accessed through our websites and mobile applications in our active customer metric, nor do we include consumers who solely make purchases of our inventory through third-party marketplaces with which we partner.

Our active customer metric for the trailing twelve months ended June 30, 2019 has declined both on a year-over-year basis and sequentially from the trailing twelve months ended March 31, 2019. The decline is primarily attributable to a decline in traffic, including traffic from email and search engine optimization ("SEO"), as well as our efforts to improve the efficiency of our marketing spend by focusing that spend on customers who we believe will have higher long-term value. That strategy has resulted in lower marketing spend on less valuable customers, particularly in North America, and led to a decrease in the number of active customers. We expect the trend of declining active customers in North America to continue in 2019 and, to some extent, into 2020 due to ongoing traffic declines and our continued focus on attracting and retaining high-quality customers.

• Gross billings and gross profit per active customer are the TTM gross billings and gross profit generated per active customer. We use these metrics to evaluate trends in customer spend and in the average contribution to gross billings and gross profit on a per-customer basis.

• Units is the number of purchases during the reporting period, before refunds and cancellations, made either through one of our online marketplaces, a third-party marketplace, or directly with a merchant for which we earn a commission. We do not include purchases with retailers using digital coupons accessed through our websites and mobile applications in our units metric. We consider unit growth to be an important indicator of the total volume of business conducted through our marketplaces.

Our total units sold declined by 12.0% for the three and six months ended June 30, 2019 as compared with the prior year, primarily reflecting unit declines in our North America segment. The decline in total units sold in the current year was primarily attributable to fewer customers, lower customer traffic, including traffic from email and SEO, and shifting impressions to support our strategic initiatives. We expect that trend to continue in 2019.

Our gross billings and units for the three and six months ended June 30, 2019 and 2018 were as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Gross billings	$	1,120,945	$	1,264,263	$	2,296,953	$	2,557,527
Units	35,324		39,950		72,516		82,374
Gross billings per unit	$	31.73	$	31.65	$	31.68	$	31.05

Our active customers, gross billings per active customer and gross profit per active customer for the TTM ended June 30, 2019 and 2018 were as follows:

	Trailing Twelve Months Ended June 30,
	2019		2018
TTM Active customers (in thousands)	46,175		49,309
TTM Gross billings per active customer	$	107.03	$	111.16
TTM Gross profit per active customer	$	27.51	$	27.27

Factors Affecting Our Performance

Attracting and Retaining Local Merchants. As we seek to build a more complete online local commerce marketplace platform, we depend on our ability to attract and retain merchants who are willing to offer discounted products and services through our marketplaces. Additionally, merchants can generally withdraw their offerings from

29

our marketplaces at any time and their willingness to continue offering products and services through our platform depends on the effectiveness of our marketing and promotional services. We primarily source the deal offerings available on our marketplaces through our sales teams, which comprise a significant portion of our global employee base. We have also entered into commercial agreements with third parties that enable us to feature additional merchant offerings through our marketplaces. We continue to focus much of our sales efforts on sourcing local deal offerings in subcategories that we believe provide us with the best opportunities for high frequency customer purchase behavior. In connection with our efforts to grow our offerings in those high frequency subcategories, which include health, beauty and wellness, events and activities, and food and drink, we may be willing to offer more attractive terms to local merchants that could reduce our deal margins in future periods.

Growing our Active Customer Base and Customer Value. We must acquire and retain customers that we expect to have long-term value, and increase gross profit per customer in order to grow our business. Our marketing spending is intended to attract and retain active customers and to promote increased purchase frequency. We have made enhancements to our customer segmentation in recent periods that are intended to better focus our marketing efforts on customers that we believe have a greater potential for long-term gross profit generation. In addition to online marketing, such as search engine marketing ("SEM"), our marketing spending includes investments in offline campaigns intended to increase customer awareness and understanding of the Groupon brand and our product and service offerings. Additionally, we consider order discounts and certain other initiatives to drive customer acquisition and activation to be marketing-related activities, even though such activities may not be presented as marketing expense in our condensed consolidated statements of operations. The organic traffic to our websites and mobile applications from consumers responding to our emails has declined in recent years, such that an increasing proportion of our traffic is generated from SEM and other paid marketing channels. We have also experienced declines from other sources of organic traffic, such as email and SEO. As such, we are focused on developing sources of organic traffic other than email and optimizing the efficiency of our marketing spending, which is primarily guided by return on investment thresholds that are currently based on expected months-to-payback targets ranging from 12 to 18 months. Additionally, our product and supply initiatives are intended to increase the rates at which visitors to our websites and mobile applications complete a purchase.

Investing in Growth. We have invested significantly in product and technology enhancements intended to support the growth of our online marketplaces and we intend to continue to do so in the future. We have also invested in business acquisitions to grow our merchant and customer base and advance our product and technology capabilities. We are currently developing and testing a number of product enhancements intended to make our offerings easier to use for both customers and merchants and to improve purchase frequency, including cash back offers linked to customer credit cards, booking capabilities and a paid membership program in North America, Groupon Select, which offers greater discounts on our offerings and other benefits. We believe that those initiatives may be important drivers for increasing customer purchase frequency and growing our business over time. We are currently focusing our efforts on growing customer awareness of those products and scaling the related merchant base. As such, our gross profit and operating income may be adversely impacted in the near term as we focus more on driving our strategic initiatives. Additionally, many of our cash back offers linked to customer credit cards involve collecting a net fee from the merchant, rather than selling a voucher to the customer and then remitting a portion of the proceeds to the merchant. As we report sales of vouchers to customers as gross billings, the growth of voucherless cash back transactions with this merchant payment structure could adversely impact our gross billings trends in future periods. Mobile consumers, particularly those accessing our marketplaces through the mobile web, generally complete purchases at a lower rate and at lower average transaction prices than consumers accessing our marketplaces through desktop computers. As a substantial majority of our traffic comes from consumers on mobile devices, we are focused on improving the mobile experience in order to increase purchase rates. Our initiatives to improve the mobile experience include improving page speeds, enhancing our relevance algorithms, streamlining the checkout process and bringing our mobile web experience to parity with that of our mobile applications.

Managing Operating Efficiency. We are focused on effectively managing our cost structure as we seek to grow our profitability in future periods. Our prior restructuring actions and our continuing efforts to automate internal processes have allowed us to centralize many of our back office activities in lower cost shared service centers resulting in significant reductions in our selling, general and administrative expense in recent periods. We have primarily used those savings to invest in marketing, people and product enhancements intended to drive the long-term growth of our business. We intend to continue to focus on driving operating efficiency.

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Results of Operations

Gross Billings

Three Months Ended June 30, 2019 and 2018:

Gross billings by category and segment for the three months ended June 30, 2019 and 2018 were as follows (dollars in thousands):

	Three Months Ended June 30,
	2019		2018		$ Change			% Change
North America
Service gross billings:
Local	$	503,830	$	548,056	$	(44,226	)	(8.1	)%
Goods	19,615		25,791		(6,176		)	(23.9	)
Travel	84,029		93,809		(9,780		)	(10.4	)
Total service gross billings	607,474		667,656		(60,182		)	(9.0	)
Product gross billings - Goods	127,739		170,710		(42,971		)	(25.2	)
Total North America gross billings	735,213		838,366		(103,153		)	(12.3	)
International
Service gross billings:
Local	203,450		203,248		202			0.1
Goods	11,699		22,849		(11,150		)	(48.8	)
Travel	43,348		48,766		(5,418		)	(11.1	)
Total service gross billings	258,497		274,863		(16,366		)	(6.0	)
Product gross billings - Goods	127,235		151,034		(23,799		)	(15.8	)
Total International gross billings	385,732		425,897		(40,165		)	(9.4	)
Total gross billings	$	1,120,945	$	1,264,263	$	(143,318	)	(11.3	)

The effect on our gross billings for the three months ended June 30, 2019 from changes in exchange rates versus the U.S. dollar was as follows (in thousands):

	Three Months Ended June 30, 2019
	At Avg. Q2 2018 Rates (1)		Exchange Rate Effect (2)			As Reported
Gross billings	$	1,144,245	$	(23,300	)	$	1,120,945

(1) Represents the financial statement balances that would have resulted had exchange rates in the reporting period been the same as those in effect in the prior year period.

(2) Represents the increase or decrease in the reported amount resulting from changes in exchange rates from those in effect in the prior year period.

North America

North America gross billings were 65.6% and 66.3% of total gross billings for the three months ended June 30, 2019 and 2018. North America gross billings decreased for the three months ended June 30, 2019 compared with the prior year period due to fewer customers, lower customer traffic, including traffic from email and SEO, and shifting impressions to support our strategic initiatives. Those decreases were partially offset by higher gross billings per unit due to a shift in mix of offerings sold.

The above factors also resulted in lower gross billings per active customer, which was $113.02 for the TTM ended June 30, 2019, as compared with $114.52 in the corresponding prior year period and total units sold, which decreased to 21.9 million units for the three months ended June 30, 2019, as compared with 26.6 million units in the prior year period.

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International

International gross billings were 34.4% and 33.7% of total gross billings for the three months ended June 30, 2019 and 2018. International gross billings decreased $40.2 million for the three months ended June 30, 2019 compared with the prior year period, primarily due to a $23.2 million unfavorable impact from year-over-year changes in foreign currency rates, weak consumer sentiment in Europe, particularly in the United Kingdom, and intensifying competition in home and garden offerings.

Six Months Ended June 30, 2019 and 2018:

Gross billings by category and segment for the six months ended June 30, 2019 and 2018 were as follows (dollars in thousands):

	Six Months Ended June 30,
	2019		2018		$ Change			% Change
North America
Service gross billings:
Local	$	1,006,139	$	1,091,077	$	(84,938	)	(7.8	)%
Goods	39,533		54,380		(14,847		)	(27.3	)
Travel	176,112		196,308		(20,196		)	(10.3	)
Total service gross billings	1,221,784		1,341,765		(119,981		)	(8.9	)
Product gross billings - Goods	282,459		351,597		(69,138		)	(19.7	)
Total North America gross billings	1,504,243		1,693,362		(189,119		)	(11.2	)
International
Service gross billings:
Local	410,846		420,555		(9,709		)	(2.3	)
Goods	21,479		42,432		(20,953		)	(49.4	)
Travel	95,287		106,288		(11,001		)	(10.4	)
Total service gross billings	527,612		569,275		(41,663		)	(7.3	)
Product gross billings - Goods	265,098		294,890		(29,792		)	(10.1	)
Total International gross billings	792,710		864,165		(71,455		)	(8.3	)
Total gross billings	$	2,296,953	$	2,557,527	$	(260,574	)	(10.2	)

The effect on our gross billings for the six months ended June 30, 2019 from changes in exchange rates versus the U.S. dollar was as follows (in thousands):

	Six Months Ended June 30, 2019
	At Avg. Q2 2018 YTD Rates (1)		Exchange Rate Effect (2)			As Reported
Gross billings	$	2,352,521	$	(55,568	)	$	2,296,953

(1) Represents the financial statement balances that would have resulted had exchange rates in the reporting period been the same as those in effect in the prior year period.

(2) Represents the increase or decrease in the reported amount resulting from changes in exchange rates from those in effect in the prior year period.

North America

North America gross billings were 65.5% and 66.2% of total gross billings for the six months ended June 30, 2019 and 2018. North America gross billings decreased for the six months ended June 30, 2019 compared with the prior year period due to fewer customers, lower customer traffic, including traffic from email and SEO, and shifting impressions to support our strategic initiatives. Those decreases were partially offset by higher gross billings per unit due to a shift in mix of offerings sold.

The above factors also resulted in lower gross billings per active customer, which was $113.02 for the TTM ended June 30, 2019, as compared with $114.52 in the corresponding prior year period and total units sold, which

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decreased to 45.0 million units for the six months ended June 30, 2019, as compared with 54.7 million units in the prior year period.

International

International gross billings were 34.5% and 33.8% of total gross billings for the six months ended June 30, 2019 and 2018. International gross billings decreased $71.5 million for the six months ended June 30, 2019 compared with the prior year period, primarily due to a $55.3 million unfavorable impact from year-over-year changes in foreign currency rates, weak consumer sentiment in Europe, particularly in the United Kingdom, and intensifying competition in home and garden offerings.

Revenue

Three Months Ended June 30, 2019 and 2018:

Revenue by category and segment for the three months ended June 30, 2019 and 2018 was as follows (dollars in thousands):

	Three Months Ended June 30,
	2019		2018		$ Change			% Change
North America
Service revenue:
Local	$	177,082	$	185,870	$	(8,788	)	(4.7	)%
Goods	3,714		3,796		(82		)	(2.2	)
Travel	16,125		19,888		(3,763		)	(18.9	)
Total service revenue	196,921		209,554		(12,633		)	(6.0	)
Product revenue - Goods	127,739		170,710		(42,971		)	(25.2	)
Total North America revenue	324,660		380,264		(55,604		)	(14.6	)
International
Service revenue:
Local	69,995		71,425		(1,430		)	(2.0	)
Goods	2,610		4,967		(2,357		)	(47.5	)
Travel	8,077		9,706		(1,629		)	(16.8	)
Total service revenue	80,682		86,098		(5,416		)	(6.3	)
Product revenue - Goods	127,235		151,034		(23,799		)	(15.8	)
Total International revenue	207,917		237,132		(29,215		)	(12.3	)
Total revenue	$	532,577	$	617,396	$	(84,819	)	(13.7	)

The effect on revenue for the three months ended June 30, 2019 from changes in exchange rates versus the U.S. dollar was as follows (in thousands):

	Three Months Ended June 30, 2019
	At Avg. Q2 2018 Rates (1)		Exchange Rate Effect (2)			As Reported
Revenue	$	545,329	$	(12,752	)	$	532,577

(1) Represents the financial statement balances that would have resulted had exchange rates in the reporting period been the same as those in effect in the prior year period.

(2) Represents the increase or decrease in the reported amount resulting from changes in exchange rates from those in effect in the prior year period.

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The percentages of service gross billings that we retained after deducting the merchant's share for the three months ended June 30, 2019 and 2018 were as follows:

North America International

North America

North America revenue was 61.0% and 61.6% of total revenue for the three months ended June 30, 2019 and 2018. North America revenue decreased $55.6 million for the three months ended June 30, 2019 compared with the prior year period, primarily driven by the decline in transaction volume and gross billings, as discussed above, partially offset by a shift in mix of offerings sold.

International

International revenue was 39.0% and 38.4% of total revenue for the three months ended June 30, 2019 and 2018. International revenue decreased $29.2 million for the three months ended June 30, 2019 compared with the prior year period, primarily driven by lower gross billings as discussed above and a $12.7 million unfavorable impact from year-over-year changes in foreign exchange rates. These declines were partially offset by a shift in our Goods category mix from service revenue transactions, which are reported on a net basis, toward product revenue transactions, which are reported on a gross basis.

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Six Months Ended June 30, 2019 and 2018:

Revenue by category and segment for the six months ended June 30, 2019 and 2018 was as follows (dollars in thousands):

	Six Months Ended June 30,
	2019		2018		$ Change			% Change
North America
Service revenue:
Local	$	357,459	$	373,281	$	(15,822	)	(4.2	)%
Goods	6,841		8,670		(1,829		)	(21.1	)
Travel	35,066		39,972		(4,906		)	(12.3	)
Total service revenue	399,366		421,923		(22,557		)	(5.3	)
Product revenue - Goods	282,459		351,597		(69,138		)	(19.7	)
Total North America revenue	681,825		773,520		(91,695		)	(11.9	)
International
Service revenue:
Local	143,185		146,003		(2,818		)	(1.9	)
Goods	4,065		8,381		(4,316		)	(51.5	)
Travel	16,814		21,142		(4,328		)	(20.5	)
Total service revenue	164,064		175,526		(11,462		)	(6.5	)
Product revenue - Goods	265,098		294,890		(29,792		)	(10.1	)
Total International revenue	429,162		470,416		(41,254		)	(8.8	)
Total revenue	$	1,110,987	$	1,243,936	$	(132,949	)	(10.7	)

The effect on revenue for the six months ended June 30, 2019 from changes in exchange rates versus the U.S. dollar was as follows (in thousands):

	Six Months Ended June 30, 2019
	At Avg. Q2 2018 YTD Rates (1)		Exchange Rate Effect (2)			As Reported
Revenue	$	1,141,453	$	(30,466	)	$	1,110,987

(1) Represents the financial statement balances that would have resulted had exchange rates in the reporting period been the same as those in effect in the prior year period.

(2) Represents the increase or decrease in the reported amount resulting from changes in exchange rates from those in effect in the prior year period.

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The percentages of service gross billings that we retained after deducting the merchant's share for the six months ended June 30, 2019 and 2018 were as follows:

North America International

North America

North America revenue was 61.4% and 62.2% of total revenue for the six months ended June 30, 2019 and 2018. North America revenue decreased $91.7 million for the six months ended June 30, 2019 compared with the prior year period, primarily driven by the decline in transaction volume and gross billings, as discussed above, partially offset by a shift in mix of offerings sold.

International

International revenue was 38.6% and 37.8% of total revenue for the six months ended June 30, 2019 and 2018. International revenue decreased $41.3 million for the six months ended June 30, 2019 compared with the prior year period, primarily driven by a $30.4 million unfavorable impact from year-over-year changes in foreign exchange rates and lower gross billings as discussed above. These declines were partially offset by the expansion of our digital coupons offerings through our acquisition of Cloud Savings in April 2018 and a shift in our Goods category mix from service revenue transactions, which are reported on a net basis, toward product revenue transactions, which are reported on a gross basis.

Cost of Revenue

Cost of revenue is comprised of direct and certain indirect costs incurred to generate revenue including credit card processing fees, editorial costs, compensation expense for technology support personnel who are responsible for maintaining the infrastructure of our websites, amortization of internal-use software relating to customer-facing applications, web hosting and other processing fees. For product revenue transactions, cost of revenue also includes the cost of inventory, shipping and fulfillment costs and inventory markdowns. Fulfillment costs are comprised of third-party logistics provider costs, as well as rent, depreciation, personnel costs and other costs of operating our fulfillment center. 

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Three Months Ended June 30, 2019 and 2018:

Cost of revenue by category and segment for the three months ended June 30, 2019 and 2018 was as follows (dollars in thousands):

	Three Months Ended June 30,
	2019		2018		$ Change			% Change
North America
Service cost of revenue:
Local	$	19,409	$	20,585	$	(1,176	)	(5.7	)%
Goods	719		806		(87		)	(10.8	)
Travel	3,319		3,585		(266		)	(7.4	)
Total service cost of revenue	23,447		24,976		(1,529		)	(6.1	)
Product cost of revenue - Goods	102,629		135,917		(33,288		)	(24.5	)
Total North America cost of revenue	126,076		160,893		(34,817		)	(21.6	)
International
Service cost of revenue:
Local	4,215		4,065		150			3.7
Goods	226		402		(176		)	(43.8	)
Travel	707		787		(80		)	(10.2	)
Total service cost of revenue	5,148		5,254		(106		)	(2.0	)
Product cost of revenue - Goods	109,221		127,591		(18,370		)	(14.4	)
Total International cost of revenue	114,369		132,845		(18,476		)	(13.9	)
Total cost of revenue	$	240,445	$	293,738	$	(53,293	)	(18.1	)

The effect on cost of revenue for the three months ended June 30, 2019 from changes in exchange rates versus the U.S. dollar was as follows (in thousands):

	Three Months Ended June 30, 2019
	At Avg. Q2 2018 Rates (1)		Exchange Rate Effect (2)			As Reported
Cost of revenue	$	247,526	$	(7,081	)	$	240,445

(1) Represents the financial statement balances that would have resulted had exchange rates in the reporting period been the same as those in effect in the prior year period.

(2) Represents the increase or decrease in the reported amount resulting from changes in exchange rates from those in effect in the prior year period.

North America

North America cost of revenue was 52.4% and 54.8% of total cost of revenue for the three months ended June 30, 2019 and 2018. North America cost of revenue decreased $34.8 million for the three months ended June 30, 2019 compared with the prior year period, primarily due to the decrease in transaction volume and gross billings as described above.

International

International cost of revenue was 47.6% and 45.2% of total cost of revenue for the three months ended June 30, 2019 and 2018. International cost of revenue decreased $18.5 million for the three months ended June 30, 2019 compared with the prior year period, primarily due to a $7.1 million favorable impact from year-over-year changes in foreign exchange rates and lower product gross billings.

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Six Months Ended June 30, 2019 and 2018:

Cost of revenue by category and segment for the six months ended June 30, 2019 and 2018 was as follows (dollars in thousands):

	Six Months Ended June 30,
	2019		2018		$ Change			% Change
North America
Service cost of revenue:
Local	$	38,704	$	41,240	$	(2,536	)	(6.1	)%
Goods	1,283		1,739		(456		)	(26.2	)
Travel	6,992		7,667		(675		)	(8.8	)
Total service cost of revenue	46,979		50,646		(3,667		)	(7.2	)
Product cost of revenue - Goods	226,460		283,823		(57,363		)	(20.2	)
Total North America cost of revenue	273,439		334,469		(61,030		)	(18.2	)
International
Service cost of revenue:
Local	8,427		8,428		(1		)	—
Goods	413		729		(316		)	(43.3	)
Travel	1,403		1,572		(169		)	(10.8	)
Total service cost of revenue	10,243		10,729		(486		)	(4.5	)
Product cost of revenue - Goods	229,157		250,195		(21,038		)	(8.4	)
Total International cost of revenue	239,400		260,924		(21,524		)	(8.2	)
Total cost of revenue	$	512,839	$	595,393	$	(82,554	)	(13.9	)

The effect on cost of revenue for the six months ended June 30, 2019 from changes in exchange rates versus the U.S. dollar was as follows (in thousands):

	Six Months Ended June 30, 2019
	At Avg. Q2 2018 YTD Rates (1)		Exchange Rate Effect (2)			As Reported
Cost of revenue	$	530,060	$	(17,221	)	$	512,839

(1) Represents the financial statement balances that would have resulted had exchange rates in the reporting period been the same as those in effect in the prior year period.

(2) Represents the increase or decrease in the reported amount resulting from changes in exchange rates from those in effect in the prior year period.

North America

North America cost of revenue was 53.3% and 56.2% of total cost of revenue for the six months ended June 30, 2019 and 2018. North America cost of revenue decreased $61.0 million for the six months ended June 30, 2019 compared with the prior year period, primarily due to the decrease in transaction volume and gross billings as described above.

International

International cost of revenue was 46.7% and 43.8% of total cost of revenue for the six months ended June 30, 2019 and 2018. International cost of revenue decreased $21.5 million for the six months ended June 30, 2019 compared with the prior year period, primarily due to a $17.2 million favorable impact from year-over-year changes in foreign exchange rates and lower product gross billings.

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Gross Profit

Three Months Ended June 30, 2019 and 2018:

Gross profit by category and segment for the three months ended June 30, 2019 and 2018 was as follows (dollars in thousands):

	Three Months Ended June 30,
	2019		2018		$ Change			% Change
North America
Service gross profit:
Local	$	157,673	$	165,285	$	(7,612	)	(4.6	)%
Goods	2,995		2,990		5			0.2
Travel	12,806		16,303		(3,497		)	(21.5	)
Total service gross profit	173,474		184,578		(11,104		)	(6.0	)
Product gross profit - Goods	25,110		34,793		(9,683		)	(27.8	)
Total North America gross profit	198,584		219,371		(20,787		)	(9.5	)
International
Service gross profit:
Local	65,780		67,360		(1,580		)	(2.3	)
Goods	2,384		4,565		(2,181		)	(47.8	)
Travel	7,370		8,919		(1,549		)	(17.4	)
Total service gross profit	75,534		80,844		(5,310		)	(6.6	)
Product gross profit - Goods	18,014		23,443		(5,429		)	(23.2	)
Total International gross profit	93,548		104,287		(10,739		)	(10.3	)
Total gross profit	$	292,132	$	323,658	$	(31,526	)	(9.7	)

The effect on gross profit for the three months ended June 30, 2019 from changes in exchange rates versus the U.S. dollar was as follows (in thousands):

	Three Months Ended June 30, 2019
	At Avg. Q2 2018 Rates (1)		Exchange Rate Effect (2)			As Reported
Gross profit	$	297,803	$	(5,671	)	$	292,132

(1) Represents the financial statement balances that would have resulted had exchange rates in the reporting period been the same as those in effect in the prior year period.

(2) Represents the increase or decrease in the reported amount resulting from changes in exchange rates from those in effect in the prior year period.

North America

North America gross profit was 68.0% and 67.8% of total gross profit for the three months ended June 30, 2019 and 2018. The decrease in North America gross profit for the three months ended June 30, 2019 compared with the prior year period reflects a decline in transaction volume and gross billings, as discussed above.

International

International gross profit was 32.0% and 32.2% of total gross profit for the three months ended June 30, 2019 and 2018. The decrease in International gross profit for the three months ended June 30, 2019 compared with the prior year period was primarily attributable to a $5.6 million unfavorable impact from year-over-year changes in foreign exchange rates and lower gross billings as discussed above.

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Six Months Ended June 30, 2019 and 2018:

Gross profit by category and segment for the six months ended June 30, 2019 and 2018 was as follows (dollars in thousands):

	Six Months Ended June 30,
	2019		2018		$ Change			% Change
North America
Service gross profit:
Local	$	318,755	$	332,041	$	(13,286	)	(4.0	)%
Goods	5,558		6,931		(1,373		)	(19.8	)
Travel	28,074		32,305		(4,231		)	(13.1	)
Total service gross profit	352,387		371,277		(18,890		)	(5.1	)
Product gross profit - Goods	55,999		67,774		(11,775		)	(17.4	)
Total North America gross profit	408,386		439,051		(30,665		)	(7.0	)
International
Service gross profit:
Local	134,758		137,575		(2,817		)	(2.0	)
Goods	3,652		7,652		(4,000		)	(52.3	)
Travel	15,411		19,570		(4,159		)	(21.3	)
Total service gross profit	153,821		164,797		(10,976		)	(6.7	)
Product gross profit - Goods	35,941		44,695		(8,754		)	(19.6	)
Total International gross profit	189,762		209,492		(19,730		)	(9.4	)
Total gross profit	$	598,148	$	648,543	$	(50,395	)	(7.8	)

The effect on gross profit for the six months ended June 30, 2019 from changes in exchange rates versus the U.S. dollar was as follows (in thousands):

	Six Months Ended June 30, 2019
	At Avg. Q2 2018 YTD Rates (1)		Exchange Rate Effect (2)			As Reported
Gross profit	$	611,393	$	(13,245	)	$	598,148

(1) Represents the financial statement balances that would have resulted had exchange rates in the reporting period been the same as those in effect in the prior year period.

(2) Represents the increase or decrease in the reported amount resulting from changes in exchange rates from those in effect in the prior year period.

North America

North America gross profit was 68.3% and 67.7% of total gross profit for the six months ended June 30, 2019 and 2018. The decrease in North America gross profit for the six months ended June 30, 2019 compared with the prior year period reflects a decline in transaction volume and gross billings, as discussed above.

International

International gross profit was 31.7% and 32.3% of total gross profit for the six months ended June 30, 2019 and 2018. The decrease in International gross profit for the six months ended June 30, 2019 compared with the prior year period was primarily attributable to a $13.2 million unfavorable impact from year-over-year changes in foreign exchange rates and lower gross billings as discussed above. These declines were partially offset by the expansion of our digital coupons offerings through our acquisition of Cloud Savings in April 2018.

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Marketing

Marketing expense consists primarily of online marketing costs, such as search engine marketing, advertising on social networking sites and affiliate programs, and offline marketing costs, such as television and radio advertising. Additionally, compensation expense for marketing employees is classified within marketing expense. We record these costs within Marketing on the condensed consolidated statements of operations when incurred. From time to time, we offer deals with well-known national merchants for customer acquisition and activation purposes, for which the amount we owe the merchant for each voucher sold exceeds the transaction price paid by the customer. Our gross billings from those transactions generate no service revenue and our net cost (i.e., the excess of the amount owed to the merchant over the amount paid by the customer) is classified as marketing expense. We evaluate marketing expense as a percentage of gross profit because it gives us an indication of how well our marketing spend is driving gross profit performance.

Three Months Ended June 30, 2019 and 2018:

Marketing expense by segment as a percentage of gross profit for the three months ended June 30, 2019 and 2018 was as follows (dollars in thousands):

	Three Months Ended June 30,
	2019		% of Gross Profit		2018		% of Gross Profit		$ Change			% Change
Marketing:
North America	$	57,110	28.8	%	$	66,402	30.3	%	$	(9,292	)	(14.0	)%
International	31,813		34.0		27,776		26.6		4,037			14.5
Total marketing	$	88,923	30.4		$	94,178	29.1		$	(5,255	)	(5.6	)

North America

North America segment marketing expense was 64.2% and 70.5% of total marketing expense for the three months ended June 30, 2019 and 2018. North America marketing expense and marketing expense as a percentage of gross profit for the three months ended June 30, 2019 decreased from the prior year period as we leveraged improved marketing analytics to drive efficiency in our marketing spend and maximize the lifetime value of our customer base.

International

International segment marketing expense was 35.8% and 29.5% of total marketing expense for the three months ended June 30, 2019 and 2018. International marketing expense and marketing expense as a percentage of gross profit for the three months ended June 30, 2019 increased from the prior year period, as we continue to invest in the long-term potential of the International segment. The increase in marketing expense was partially offset by a $1.8 million favorable impact from year-over-year changes in foreign exchange rates.

Six Months Ended June 30, 2019 and 2018:

Marketing expense by segment as a percentage of gross profit for the six months ended June 30, 2019 and 2018 was as follows (dollars in thousands):

	Six Months Ended June 30,
	2019		% of Gross Profit		2018		% of Gross Profit		$ Change			% Change
Marketing:
North America	$	116,909	28.6	%	$	137,853	31.4	%	$	(20,944	)	(15.2	)%
International	65,411		34.5		55,481		26.5		9,930			17.9
Total marketing	$	182,320	30.5		$	193,334	29.8		$	(11,014	)	(5.7	)

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North America

North America segment marketing expense was 64.1% and 71.3% of total marketing expense for the six months ended June 30, 2019 and 2018. North America marketing expense and marketing expense as a percentage of gross profit for the six months ended June 30, 2019 decreased from the prior year period as we leveraged improved marketing analytics to drive efficiency in our marketing spend and maximize the lifetime value of our customer base.

International

International segment marketing expense was 35.9% and 28.7% of total marketing expense for the six months ended June 30, 2019 and 2018. International marketing expense and marketing expense as a percentage of gross profit for the six months ended June 30, 2019 increased from the prior year period, as we continue to invest in the long-term potential of the International segment. The increase in marketing expense was partially offset by a $4.4 million favorable impact from year-over-year changes in foreign exchange rates.

Selling, General, and Administrative

Selling expenses reported within Selling, general and administrative ("SG&A") on the condensed consolidated statements of operations consist of sales commissions and other compensation expenses for sales representatives, as well as costs associated with supporting the sales function such as technology, telecommunications and travel. General and administrative expenses include compensation expense for employees involved in customer service, operations, technology and product development, as well as general corporate functions, such as finance, legal and human resources. Additional costs included in general and administrative include depreciation and amortization, rent, professional fees, litigation costs, travel and entertainment, recruiting, office supplies, maintenance, certain technology costs and other general corporate costs. We evaluate SG&A expense as a percentage of gross profit because it gives us an indication of our operating efficiency.

Three Months Ended June 30, 2019 and 2018:

SG&A as a percentage of gross profit for the three months ended June 30, 2019 and 2018 was as follows (dollars in thousands):

	Three Months Ended June 30,
	2019		% of Gross Profit		2018		% of Gross Profit		$ Change			% Change
Selling, general and administrative	$	210,348	72.0	%	$	293,725	90.8	%	$	(83,377	)	(28.4	)%

The decrease in SG&A for the three months ended June 30, 2019 as compared with the prior year period was primarily attributable to:

• a $75.0 million charge recorded in the three months ended June 30, 2018 to increase our contingent liability related to a patent litigation case with IBM;

• a $4.9 million favorable impact from year-over-year changes in foreign currency exchange rates; and

• decreases in facilities costs, system costs, litigation and other general expenses.

Six Months Ended June 30, 2019 and 2018:

SG&A as a percentage of gross profit for the six months ended June 30, 2019 and 2018 was as follows (dollars in thousands):

	Six Months Ended June 30,
	2019		% of Gross Profit		2018		% of Gross Profit		$ Change			% Change
Selling, general and administrative	$	420,772	70.3	%	$	516,069	79.6	%	$	(95,297	)	(18.5	)%

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The decrease in SG&A for the six months ended June 30, 2019 as compared with the prior year period was attributable to the following:

• a $75.0 million charge recorded in the six months ended June 30, 2018 to increase our contingent liability related to a patent litigation case with IBM;

• an $11.2 million favorable impact from year-over-year changes in foreign currency exchange rates; and

• decreases in compensation-related costs, including variable compensation, facilities costs, system costs, litigation and other general expenses.

Income (Loss) from Operations

Three Months Ended June 30, 2019 and 2018:

Income (loss) from operations by segment for the three months ended June 30, 2019 and 2018 was as follows (dollars in thousands):

	Three Months Ended June 30,
	2019			2018			$ Change			% Change
Income (loss) from operations
North America	$	(372	)	$	(68,524	)	$	68,152		99.5	%
International	(6,767		)	4,279			(11,046		)	(258.1	)
Total income (loss) from operations	$	(7,139	)	$	(64,245	)	$	57,106		88.9

North America

The increase in our income from operations was primarily attributable to a $79.6 million decrease in SG&A and a $9.3 million decrease in marketing expense, partially offset by a $20.8 million decrease in gross profit.

Income (loss) from operations includes stock-based compensation of $24.1 million and $15.0 million for the three months ended June 30, 2019 and 2018.

International

The decrease in our income from operations was primarily attributable to a $4.0 million increase in marketing expense and a $10.7 million decrease in gross profit, partially offset by a $3.7 million decrease in SG&A.

Income (loss) from operations includes stock-based compensation of $2.5 million and $1.3 million for the three months ended June 30, 2019 and 2018.

Six Months Ended June 30, 2019 and 2018:

Income (loss) from operations by segment for the six months ended June 30, 2019 and 2018 was as follows (dollars in thousands):

	Six Months Ended June 30,
	2019			2018			$ Change			% Change
Income (loss) from operations
North America	$	4,964		$	(70,384	)	$	75,348		107.1	%
International	(9,908		)	9,524			(19,432		)	(204.0	)
Total income (loss) from operations	$	(4,944	)	$	(60,860	)	$	55,916		91.9

North America

The increase in our income from operations was primarily attributable to an $85.1 million decrease in SG&A and a $20.9 million decrease in marketing expense, partially offset by a $30.7 million decrease in gross profit.

Income (loss) from operations includes stock-based compensation of $38.9 million and $32.9 million for the six months ended June 30, 2019 and 2018.

International

The decrease in our income from operations was primarily attributable to a $9.9 million increase in marketing expense and a $19.7 million decrease in gross profit, partially offset by a $10.2 million decrease in SG&A.

Income (loss) from operations includes stock-based compensation of $4.1 million and $2.7 million for the six months ended June 30, 2019 and 2018.

Other Income (Expense), Net

Other income (expense), net includes interest income, interest expense, gains and losses on fair value option investments, impairments of investments and foreign currency gains and losses, primarily resulting from intercompany balances with our subsidiaries that are denominated in foreign currencies.

Three Months Ended June 30, 2019 and 2018:

Other income (expense), net for the three months ended June 30, 2019 and 2018 was as follows (dollars in thousands):

	Three Months Ended June 30,
	2019			2018			$ Change			% Change
Other income (expense), net	$	(28,494	)	$	(26,457	)	$	(2,037	)	(7.7	)%

Other income (expense), net for the three months ended June 30, 2019 primarily consisted of the following:

• $27.6 million of net losses on our fair value option investments. See Item 1, Note 3, Investments, for additional information; and

• $5.4 million of interest expense primarily related to interest on our convertible notes. See Item 1, Note 5, Financing Arrangements, for additional information.

Those items were partially offset by $1.9 million in interest income and $2.6 million in foreign currency gains, which primarily resulted from intercompany balances with our subsidiaries that are denominated in foreign currencies.

Other income (expense), net for the three months ended June 30, 2018 primarily consisted of the following:

• $12.5 million in foreign currency losses, which primarily resulted from intercompany balances with our subsidiaries that are denominated in foreign currencies;

• $9.2 million of impairment charges for available-for-sale and other equity investments. See Item 1, Note 3, Investments, for additional information;

• $5.2 million of interest expense primarily related to interest on our convertible notes. See Item 1, Note 5, Financing Arrangements, for additional information; and

• $3.0 million of net losses on our fair value option investments. See Item 1, Note 3, Investments, for additional information.

Those items were partially offset by $1.8 million in interest income and a $1.7 million gain on an embedded derivative related to an available-for-sale security.

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Six Months Ended June 30, 2019 and 2018:

Other income (expense), net for the six months ended June 30, 2019 and 2018 was as follows (dollars in thousands):

	Six Months Ended June 30,
	2019			2018			$ Change			% Change
Other income (expense), net	$	(75,349	)	$	(34,972	)	$	(40,377	)	(115.5	)%

Other income (expense), net for the six months ended June 30, 2019 primarily consisted of the following:

• $69.0 million of net losses on our fair value option investments. See Item 1, Note 3, Investments, for additional information; and

• $11.1 million of interest expense primarily related to interest on our convertible notes. See Item 1, Note 5, Financing Arrangements, for additional information.

Those items were partially offset by $3.9 million in interest income and $0.9 million in foreign currency gains, which primarily resulted from intercompany balances with our subsidiaries that are denominated in foreign currencies.

Other income (expense), net for the six months ended June 30, 2018 primarily consisted of the following:

• $11.1 million in foreign currency losses, which primarily resulted from intercompany balances with our subsidiaries that are denominated in foreign currencies;

• $10.7 million of interest expense primarily related to interest on our convertible notes. See Item 1, Note 5, Financing Arrangements, for additional information;

• $10.0 million of impairment charges for available-for-sale and other equity investments. See Item 1, Note 3, Investments, for additional information; and

• $8.1 million of net losses on our fair value option investments. See Item 1, Note 3, Investments, for additional information.

Those items were partially offset by $3.3 million in interest income and a $1.7 million gain on an embedded derivative related to an available-for-sale security.

Provision (Benefit) for Income Taxes

Three Months Ended June 30, 2019 and 2018:

Provision (benefit) for income taxes for the three months ended June 30, 2019 and 2018 was as follows (dollars in thousands):

	Three Months Ended June 30,
	2019			2018			$ Change		% Change
Provision (benefit) for income taxes	$	2,012		$	1,552		$	460	29.6	%
Effective tax rate	(5.6		)%	(1.7		)%

Our U.S. Federal income tax rate is 21%. The primary factor impacting the effective tax rate for the three months ended June 30, 2019 and 2018 was the pretax losses incurred in jurisdictions that have valuation allowances against their net deferred tax assets. We expect that our consolidated effective tax rate in future periods will continue to differ significantly from the U.S. federal income tax rate as a result of our tax obligations in jurisdictions with profits and valuation allowances in jurisdictions with losses. See Item 1, Note 10, Income Taxes, for additional information relating to tax audits and assessments and regulatory and legal developments that may impact our business and results of operations in the future.

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Six Months Ended June 30, 2019 and 2018:

Provision (benefit) for income taxes for the six months ended June 30, 2019 and 2018 was as follows (dollars in thousands):

	Six Months Ended June 30,
	2019			2018			$ Change			% Change
Provision (benefit) for income taxes	$	(1,478	)	$	(783	)	$	(695	)	(88.8	)%
Effective tax rate	1.8		%	0.8		%

Our U.S. Federal income tax rate is 21%. The primary factor impacting the effective tax rate for the six months ended June 30, 2019 and 2018 was the pretax losses incurred in jurisdictions that have valuation allowances against their net deferred tax assets. The effective tax rate for the six months ended June 30, 2019 also reflected the reversal of reserves for uncertain tax positions due to the closure of a tax audit. The effective tax rate for the six months ended June 30, 2018 also reflected a $6.4 million income tax benefit resulting from the impact of Topic 606 on intercompany activity in certain foreign jurisdictions. We expect that our consolidated effective tax rate in future periods will continue to differ significantly from the U.S. federal income tax rate as a result of our tax obligations in jurisdictions with profits and valuation allowances in jurisdictions with losses. See Item 1, Note 10, Income Taxes, for additional information relating to tax audits and assessments and regulatory and legal developments that may impact our business and results of operations in the future.

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Non-GAAP Financial Measures

In addition to financial results reported in accordance with U.S. GAAP, we have provided the following non-GAAP financial measures: Adjusted EBITDA, free cash flow and foreign currency exchange rate neutral operating results. Those non-GAAP financial measures, which are presented on a continuing operations basis, are intended to aid investors in better understanding our current financial performance and prospects for the future as seen through the eyes of management. We believe that those non-GAAP financial measures facilitate comparisons with our historical results and with the results of peer companies who present similar measures (although other companies may define non-GAAP measures differently than we define them, even when similar terms are used to identify such measures). However, those non-GAAP financial measures are not intended to be a substitute for those reported in accordance with U.S. GAAP.

Adjusted EBITDA. Adjusted EBITDA is a non-GAAP performance measure that we define as net income (loss) from continuing operations excluding income taxes, interest and other non-operating items, depreciation and amortization, stock-based compensation, acquisition-related expense (benefit), net and other special charges and credits, including items that are unusual in nature or infrequently occurring. Our definition of Adjusted EBITDA may differ from similar measures used by other companies, even when similar terms are used to identify such measures. Adjusted EBITDA is a key measure used by our management and Board of Directors to evaluate operating performance, generate future operating plans and make strategic decisions for the allocation of capital. Accordingly, we believe that Adjusted EBITDA provides useful information to investors and others in understanding and evaluating our operating results in the same manner as our management and Board of Directors. However, Adjusted EBITDA is not intended to be a substitute for income (loss) from continuing operations.

We exclude stock-based compensation expense and depreciation and amortization because they are primarily non-cash in nature and we believe that non-GAAP financial measures excluding those items provide meaningful supplemental information about our operating performance and liquidity. Acquisition-related expense (benefit), net is comprised of the change in the fair value of contingent consideration arrangements and external transaction costs related to business combinations, primarily consisting of legal and advisory fees. The composition of our contingent consideration arrangements and the impact of those arrangements on our operating results vary over time based on a number of factors, including the terms of our business combinations and the timing of those transactions. For the three and six months ended June 30, 2019 and 2018, special charges and credits included charges related to our restructuring plan. For the three and six months ended June 30, 2018, special charges and credits also included the $75.0 million charge recorded in the second quarter 2018 related to a patent litigation case with IBM. We exclude special charges and credits from Adjusted EBITDA because we believe that excluding those items provides meaningful supplemental information about our core operating performance and facilitates comparisons with our historical results.

The following is a reconciliation of Adjusted EBITDA to the most comparable U.S. GAAP financial measure, Income (loss) from continuing operations for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Income (loss) from continuing operations	$	(37,645	)	$	(92,254	)	$	(78,815	)	$	(95,049	)
Adjustments:
Stock-based compensation (1)	26,563			16,266			42,974			35,544
Depreciation and amortization	27,116			28,954			55,532			58,615
Acquisition-related expense (benefit), net	28			655			28			655
Restructuring charges	(47		)	(399		)	(114		)	(116		)
IBM patent litigation	—			75,000			—			75,000
Other (income) expense, net	28,494			26,457			75,349			34,972
Provision (benefit) for income taxes	2,012			1,552			(1,478		)	(783		)
Total adjustments	84,166			148,485			172,291			203,887
Adjusted EBITDA	$	46,521		$	56,231		$	93,476		$	108,838

(1) Represents stock-based compensation expense recorded within Selling, general and administrative, Cost of revenue and Marketing.

Free cash flow. Free cash flow is a non-GAAP liquidity measure that comprises net cash provided by operating activities from continuing operations less purchases of property and equipment and capitalized software. We use free cash flow to conduct and evaluate our business because, although it is similar to cash flow from continuing operations,

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we believe that it typically represents a more useful measure of cash flows because purchases of fixed assets, software developed for internal use and website development costs are necessary components of our ongoing operations. Free cash flow is not intended to represent the total increase or decrease in our cash balance for the applicable period.

Free cash flow has limitations due to the fact that it does not represent the residual cash flow available for discretionary expenditures. For example, free cash flow does not include cash payments for business acquisitions. In addition, free cash flow reflects the impact of the timing difference between when we are paid by customers and when we pay merchants and suppliers. Therefore, we believe it is important to view free cash flow as a complement to our entire condensed consolidated statements of cash flows. For a reconciliation of free cash flow to the most comparable U.S. GAAP financial measure, see Liquidity and Capital Resources below.

Foreign currency exchange rate neutral operating results. Foreign currency exchange rate neutral operating results show current period operating results as if foreign currency exchange rates had remained the same as those in effect in the prior year period. Those measures are intended to facilitate comparisons to our historical performance. For a reconciliation of foreign currency exchange rate neutral operating results to the most comparable U.S. GAAP financial measures, see Results of Operations above.

Liquidity and Capital Resources

Our principal sources of liquidity are cash flows from operations, cash balances, which totaled $596.8 million as of June 30, 2019, and available borrowing capacity under our 2019 Credit Agreement.

Our net cash flows from operating, investing and financing activities from continuing operations for three and six months ended June 30, 2019 and 2018 were as follows (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Cash provided by (used in):
Operating activities	$	(1,219	)	$	44,175		$	(148,702	)	$	(75,572	)
Investing activities	(17,235		)	(75,714		)	(35,350		)	(96,096		)
Financing activities	(31,581		)	(18,729		)	(59,358		)	(39,628		)

Our free cash flow for the three and six months ended June 30, 2019 and 2018 and reconciliations to the most comparable U.S. GAAP financial measure, Net cash provided by (used in) operating activities from continuing operations, for those periods are as follows (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Net cash provided by (used in) operating activities from continuing operations	$	(1,219	)	$	44,175		$	(148,702	)	$	(75,572	)
Purchases of property and equipment and capitalized software from continuing operations	(16,684		)	(17,373		)	(34,161		)	(37,517		)
Free cash flow	$	(17,903	)	$	26,802		$	(182,863	)	$	(113,089	)

Our revenue-generating transactions are primarily structured such that we collect cash up-front from customers and pay third-party merchants at a later date, either based on a fixed payment schedule or upon the customer's redemption of the related voucher. For merchants on fixed payment terms, we remit payments on an ongoing basis, generally bi-weekly, throughout the term of the merchant's offering. For purchases of merchandise inventory, our supplier payment terms generally range from net 30 to net 60 days. We have primarily paid merchants on fixed payment terms in North America and upon voucher redemption internationally. In the third quarter 2017, we began to increase our use of redemption payment terms with our North America merchants and we expect that trend to continue.

Our cash balances fluctuate significantly throughout the year based on many variables, including gross billings growth rates, the timing of payments to merchants and suppliers, seasonality and the mix of transactions between Goods and Local. For example, we typically generate strong cash inflows during the fourth quarter holiday season, driven primarily by our Goods category, followed by significant cash outflows in the following period when payments are made to inventory suppliers. We are currently developing and testing voucherless offerings that are linked to customer credit cards. For our card-linked offerings, we offer cash back on customers' credit card statements based

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on qualifying purchases with participating merchants. For many of those offerings, we typically remit payment to a card brand network within two weeks of the qualifying purchase for the customer's cash back incentive and then we collect from the merchant both our commission and reimbursement for the customer's cash back incentive, usually on a monthly basis. The working capital impact of card-linked offerings with this merchant payment structure is less favorable to us than voucher transactions, for which we collect payment from customers at the time of sale and remit payment to merchants at a later date. As such, our cash flows will initially be adversely impacted to the extent we scale these types of card-linked offerings in future periods.

For the six months ended June 30, 2019, our net cash used in operating activities from continuing operations was $148.7 million, as compared with a $78.8 million net loss from continuing operations. That difference was primarily due to $174.3 million of non-cash items, including depreciation and amortization, stock-based compensation and a $69.4 million loss from changes in fair value of our investment in Monster LP, partially offset by a $244.2 million decrease from changes in working capital and other assets and liabilities. The working capital impact was primarily related to the seasonal timing of payments to inventory suppliers and to a lesser extent a reduction in gross billings.

For the six months ended June 30, 2018, our net cash used in operating activities from continuing operations was $75.6 million, as compared with a $95.0 million net loss from continuing operations. That difference was primarily due to $111.6 million of non-cash items, including depreciation and amortization and stock-based compensation, partially offset by a $92.1 million decrease from changes in working capital and other assets and liabilities. The working capital impact was primarily related to the seasonal timing of payments to inventory suppliers and to a lesser extent a reduction in gross billings.

Our net cash used in investing activities from continuing operations was $35.4 million and $96.1 million for the six months ended June 30, 2019 and 2018. Our net cash used in investing activities from continuing operations included purchases of property and equipment and capitalized software of $34.2 million and $37.5 million for the six months ended June 30, 2019 and 2018. For the six months ended June 30, 2018, net cash used in investing activities also included net cash paid of $57.8 million related to the acquisition of Cloud Savings.

Our net cash used in financing activities was $59.4 million and $39.6 million for the six months ended June 30, 2019 and 2018. For the six months ended June 30, 2019, net cash used in financing activities included $29.6 million in purchases of treasury stock under our share repurchase program, $12.6 million in payments of finance lease obligations and $10.2 million in taxes paid related to net share settlements of stock-based compensation awards. For the six months ended June 30, 2018, net cash used in financing activities included $17.2 million in payments of finance lease obligations and $16.1 million in taxes paid related to net share settlements of stock-based compensation awards.

In May 2019, we entered into the 2019 Credit Agreement which provides for aggregate principal borrowings of up to $400.0 million and matures in May 2024. The 2019 Credit Agreement replaced our previous $250.0 million amended and restated credit agreement that was scheduled to mature in June 2019. As of June 30, 2019, we had no borrowings outstanding under the 2019 Credit Agreement and were in compliance with all covenants. See Item 1, Note 5, Financing Arrangements, for additional information.

As of June 30, 2019, we had $231.1 million in cash held by our international subsidiaries, which is primarily denominated in Euros, Pounds Sterling, Canadian dollars, and, to a lesser extent, Australian dollars and Japanese yen. In general, it is our practice and intention to re-invest the earnings of our non-U.S. subsidiaries in those operations. We have not, nor do we anticipate the need to, repatriate funds to the United States to satisfy domestic liquidity needs arising in the ordinary course of business.

In May 2018, the Board of Directors authorized us to repurchase up to $300.0 million of our common stock under our share repurchase program. During the three and six months ended June 30, 2019, we repurchased 4,228,148 and 8,636,143 shares for an aggregate purchase price of $15.1 million and $30.1 million (including fees and commissions) under our repurchase program. As of June 30, 2019, up to $260.0 million of common stock remained available for purchase under our program. The timing and amount of share repurchases, if any, will be determined based on market conditions, limitations under our 2019 Credit Agreement, share price and other factors, and the share repurchase program may be terminated at any time. Repurchases will be made in compliance with SEC rules and other legal requirements and may be made, in part, under a Rule 10b5-1 plan, which permits share repurchases when we might otherwise be precluded from doing so.

Our cash balances and cash flows generated from our operations may be used to fund strategic investments, business acquisitions, working capital needs, investments in technology, marketing and share repurchases.

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Additionally, we have the ability to borrow funds under our 2019 Credit Agreement. We could also seek to raise additional financing, if available on terms that we believe are favorable, to increase the amount of liquid funds that we can access for acquisitions, share repurchases or other strategic investment opportunities. Although we can provide no assurances, we believe that our cash balances and cash generated from operations should be sufficient to meet our working capital requirements and capital expenditures for at least the next twelve months.

Contractual Obligations and Commitments

Our contractual obligations and commitments as of June 30, 2019 did not materially change from the amounts set forth in our 2018 Annual Report on Form 10-K, except as disclosed in Item 1, Note 6, Leases.

Off-Balance Sheet Arrangements

We did not have any off-balance sheet arrangements as of June 30, 2019.

Critical Accounting Policies and Estimates

The preparation of condensed consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts and classifications of assets and liabilities, revenue and expenses, and related disclosure of contingent liabilities. Management bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

Management's Discussion and Analysis of Financial Condition and Results of Operations is based upon our condensed consolidated financial statements, which have been prepared in accordance with U.S. GAAP. Our significant accounting policies are discussed in Item 2, Note 2, Summary of Significant Accounting Policies, and in the notes to the consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2018. In addition, refer to the critical accounting policies and estimates under Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations in our Annual Report on Form 10-K for the year ended December 31, 2018.

The changes to our lease recognition policies upon the adoption of Topic 842 on January 1, 2019 represent a material change to our critical accounting policies and estimates during the six months ended June 30, 2019. See Item 1, Note 6, Leases, for additional information related to our new lease recognition policies.

Recently Issued Accounting Standards

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326) - Measurement of Credit Losses of Financial Instruments. This ASU requires entities to measure credit losses for financial assets measured at amortized cost based on expected losses rather than incurred losses. For available-for-sale debt securities with unrealized losses, entities will be required to recognize credit losses through an allowance for credit losses. The ASU will be effective for annual reporting periods beginning after December 15, 2019 and interim periods within those annual periods. While we are still assessing the impact of ASU 2016-13, we currently believe that the adoption of this guidance will not have a material impact on our condensed consolidated financial statements.

In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350) - Simplifying the Test for Goodwill Impairment. This ASU eliminates Step 2 of the goodwill impairment test and requires a goodwill impairment to be measured as the amount by which a reporting unit’s carrying amount exceeds its fair value, not to exceed the carrying amount of its goodwill. The ASU is effective for annual or any interim goodwill impairment tests

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in fiscal years beginning after December 15, 2019. We believe that the adoption of this guidance will not have a material impact on our condensed consolidated financial statements.

In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820) - Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. This ASU modifies the disclosure requirements in Topic 820, Fair Value Measurement, by removing, modifying, or adding certain disclosures. The ASU will be effective for annual reporting periods beginning after December 15, 2019 and interim periods within those annual periods. Early adoption is permitted, and entities are permitted to early adopt any removed or modified disclosures and delay adoption of the additional disclosures until the effective date. We are still assessing the impact of ASU 2018-13 on our condensed consolidated financial statements.

There are no other accounting standards that have been issued but not yet adopted that are expected to have a material impact on our condensed consolidated financial position or results of operations.

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We have operations both within the United States and internationally, and we are exposed to market risks in the ordinary course of our business, including the effect of foreign currency fluctuations, interest rate changes and inflation. Information relating to quantitative and qualitative disclosures about those market risks is set forth below.

Foreign Currency Exchange Risk

We transact business in various foreign currencies other than the U.S. dollar, principally the euro, British pound sterling, Canadian dollar and Australian dollar, which exposes us to foreign currency risk. For the three and six months ended June 30, 2019, we derived approximately 39.0% and 38.6% of our revenue from our International segment. Revenue and related expenses generated from our international operations are generally denominated in the local currencies of the corresponding countries. The functional currencies of our subsidiaries that either operate or support those markets are generally the same as the corresponding local currencies. However, the results of operations of, and certain of our intercompany balances associated with, our international operations are exposed to foreign currency exchange rate fluctuations. Upon consolidation, as exchange rates vary, our revenue and other operating results may differ materially from expectations, and we may record significant gains or losses on the re-measurement of intercompany balances.

We assess our foreign currency exchange risk based on hypothetical changes in rates utilizing a sensitivity analysis that measures the potential impact on working capital based on a 10% change (increase and decrease) in currency rates. We use a current market pricing model to assess the changes in the value of the U.S. dollar on foreign currency denominated monetary assets and liabilities. The primary assumption used in this model is a hypothetical 10% weakening or strengthening of the U.S. dollar against those currency exposures as of June 30, 2019 and December 31, 2018.

As of June 30, 2019, our net working capital surplus (defined as current assets less current liabilities) from subsidiaries that are subject to foreign currency translation risk was $12.7 million. The potential increase in this working capital surplus from a hypothetical 10% adverse change in quoted foreign currency exchange rates would be $1.3 million. This compares with a $20.8 million working capital surplus subject to foreign currency exposure as of December 31, 2018, for which a 10% adverse change would have resulted in a potential increase in this working capital surplus of $2.1 million.

Interest Rate Risk

Our cash balance as of June 30, 2019 consists of bank deposits, so exposure to market risk for changes in interest rates is limited. In April 2016, we issued convertible notes with an aggregate principal amount of $250.0 million (see Item 1, Note 5, Financing Arrangements). The convertible notes bear interest at a fixed rate, so we have no financial statement impact from changes in interest rates. However, changes in market interest rates impact the fair value of the convertible notes along with other variables such as our credit spreads and the market price and volatility of our common stock. In May 2019, we entered into the 2019 Credit Agreement which provides for aggregate principal borrowings of up to $400.0 million. As of June 30, 2019, we had no borrowings outstanding under the 2019 Credit Agreement. Because the 2019 Credit Agreement bears interest at a variable rate, we are exposed to market risk relating to changes in interest rates if we borrow under the 2019 Credit Agreement. We also have $174.0 million of lease obligations. Interest rates on existing leases typically do not change unless there is a modification to a lease agreement and as such, we do not believe that the interest rate risk on the lease obligations is significant.

Impact of Inflation

We believe that our results of operations are not materially impacted by moderate changes in the inflation rate. Inflation and changing prices did not have a material effect on our business, financial condition or results of operations for the three and six months ended June 30, 2019.

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ITEM 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and our Chief Financial Officer, has evaluated the effectiveness of the design and operation of our disclosure controls and procedures pursuant to Rule 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the Exchange Act), as of the end of the period covered by this Quarterly Report on Form 10-Q.

Based on this evaluation, our management concluded that, as of June 30, 2019, our disclosure controls and procedures are effective to provide reasonable assurance that information we are required to disclose in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting identified in connection with the evaluation required by Rule 13a-15(d) and 15d-15(d) of the Exchange Act that occurred during the period covered by this Quarterly Report on Form 10-Q that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Limitations on Effectiveness of Controls and Procedures

In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives. In addition, the design of disclosure controls and procedures must reflect the fact that there are resource constraints and that management is required to apply its judgment in evaluating the benefits of possible controls and procedures relative to their costs.

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PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

For a description of our material pending legal proceedings, please see Item 1, Note 7, Commitments and Contingencies, to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.

ITEM 1A. RISK FACTORS

There have been no material changes from the risk factors previously disclosed in Part I, Item 1A, Risk Factors of our Annual Report on Form 10-K for the year ended December 31, 2018, and Quarterly Report on Form 10-Q for the quarter ended March 31, 2019.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

Recent Sales of Unregistered Securities

During the three months ended June 30, 2019, we did not issue any unregistered equity securities.

Issuer Purchases of Equity Securities

On May 7, 2018, the Board authorized us to repurchase up to $300.0 million of our common stock under our share repurchase program. During the three and six months ended June 30, 2019, we repurchased 4,228,148 and 8,636,143 shares for an aggregate purchase price of $15.1 million and $30.1 million (including fees and commissions) under our repurchase program. As of June 30, 2019, up to $260.0 million of common stock remained available for purchase under our program. The timing and amount of share repurchases, if any, will be determined based on market conditions, limitations under the 2019 Credit Agreement, share price and other factors, and the share purchase program may be terminated at any time. We will fund the repurchases, if any, through cash on hand, future cash flows and borrowings under our credit facility. Repurchases will be made in compliance with SEC rules and other legal requirements and may be made in part under a Rule 10b5-1 plan, which permits stock repurchases when we might otherwise be precluded from doing so.

A summary of our common stock repurchases during the three months ended June 30, 2019 under our share repurchase program is set forth in the following table:

Date	Total Number of Shares Purchased	Average Price Paid Per Share		Total Number of Shares Purchased as Part of Publicly Announced Program	Maximum Number (or Approximate Dollar Value) of Shares that May Yet Be Purchased Under Program
April 1-30, 2019	—	$	—	—	$	275,000,002
May 1-31, 2019	1,221,792	3.54		1,221,792	270,685,687
June 1-30, 2019	3,006,356	3.57		3,006,356	260,000,005
Total	4,228,148	$	3.56	4,228,148	$	260,000,005

The following table provides information about purchases of shares of our common stock during the three months ended June 30, 2019 related to shares withheld upon vesting of restricted stock units for minimum tax withholding obligations:

Date	Total Number of Shares Purchased (1)	Average Price Paid Per Share		Total Number of Shares Purchased as Part of Publicly Announced Program	Maximum Number (or Approximate Dollar Value) of Shares that May Yet Be Purchased Under Program
April 1-30, 2019	271,025	$	3.51	—	—
May 1-31, 2019	208,786	3.52		—	—
June 1-30, 2019	1,044,591	3.54		—	—
Total	1,524,402	$	3.53	—	—

(1) Total number of shares delivered to us by employees to satisfy the mandatory tax withholding requirement upon vesting of stock-based compensation awards.

53

ITEM 5. OTHER INFORMATION

On July 29, 2019, Joey Levin resigned as a director of the Company. The departure of Mr. Levin was not the result of any disagreement with the Company, and we thank him for his dedicated service to Groupon.

ITEM 6. EXHIBITS

Exhibit Number	Description
10.1	Second Amended and Restated Credit Agreement, dated as of May 14, 2019, among the Company, JP Morgan Chase Bank, N.A., as Administrative Agent, and the lenders party thereto (incorporated by reference to the Company's Current Report on Form 8-K filed on May 20, 2019).
10.2	Groupon, Inc. 2011 Incentive Plan, as amended (incorporated by reference to Appendix B to the Company's Definitive Proxy Statement on Schedule DEF14A, filed with the SEC on April 26, 2019). **
10.3	Groupon, Inc. 2012 Employee Stock Purchase Plan, as amended (incorporated by reference to Appendix C to the Company's Definitive Proxy Statement on Schedule DEF14A, filed with the SEC on April 26, 2019). **
31.1	Certification of Chief Executive Officer pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of Chief Financial Officer pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Certifications of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

_____________________________________

** Management contract or compensatory plan or arrangement

54

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized on this 30th day of July 2019.

GROUPON, INC.
By:	/s/ Michael Randolfi
	Name:	Michael Randolfi
	Title:	Chief Financial Officer

55

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Rich Williams, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Groupon, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: July 30, 2019/s/ Rich Williams

Rich Williams

Chief Executive Officer

(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Michael Randolfi, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Groupon, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: July 30, 2019/s/ Michael Randolfi

Michael Randolfi

Chief Financial Officer

(Principal Financial Officer)

EX-32.1

Exhibit 32.1

Certifications Pursuant to

18 U.S.C. Section 1350

As Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of Groupon, Inc. (the "Company") on Form 10-Q for the period ended June 30, 2019, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Rich Williams, Chief Executive Officer of the Company, and Michael Randolfi, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

By:    /s/ Rich Williams

Rich Williams

Chief Executive Officer

(Principal Executive Officer)

By:    /s/ Michael Randolfi

Michael Randolfi

Chief Financial Officer

(Principal Financial Officer)

Date: July 30, 2019

XML

Cover Page - shares	6 Months Ended
	Jun. 30, 2019	Jul. 26, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2019
Document Transition Report	false
Entity File Number	1-35335
Entity Registrant Name	Groupon, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	27-0903295
Entity Address, Address Line One	600 W Chicago Avenue
Entity Address, Address Line Two	Suite 400
Entity Address, City or Town	Chicago
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60654
City Area Code	(312)
Local Phone Number	334-1579
Title of 12(b) Security	Common stock, par value $0.0001 per share
Trading Symbol	GRPN
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Smaller Reporting Company	false
Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		567,619,924
Entity Central Index Key	0001490281
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2

XML

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 596,837	$ 841,021
Accounts receivable, net	74,706	69,493
Prepaid expenses and other current assets	91,056	88,115
Total current assets	762,599	998,629
Property, equipment and software, net	134,672	143,117
Right-of-use assets - operating leases, net	114,500	0
Goodwill	324,705	325,491
Intangible assets, net	38,996	45,401
Investments	39,301	108,515
Other non-current assets	24,435	20,989
Total Assets	1,439,208	1,642,142
Current liabilities:
Accounts payable	26,968	38,359
Accrued merchant and supplier payables	464,125	651,781
Accrued expenses and other current liabilities	258,610	267,034
Total current liabilities	749,703	957,174
Convertible senior notes, net	208,100	201,669
Operating lease obligations	121,526	0
Other non-current liabilities	53,740	100,688
Total Liabilities	1,133,069	1,259,531
Stockholders' Equity
Common stock, par value $0.0001 per share, 2,010,000,000 shares authorized; 767,155,735 shares issued and 566,664,464 shares outstanding at June 30, 2019; 760,939,440 shares issued and 569,084,312 shares outstanding at December 31, 2018	76	76
Additional paid-in capital	2,271,600	2,234,560
Treasury stock, at cost, 200,491,271 and 191,855,128 shares at June 30, 2019 and December 31, 2018	(907,599)	(877,491)
Accumulated deficit	(1,093,232)	(1,010,499)
Accumulated other comprehensive income (loss)	34,485	34,602
Total Groupon, Inc. Stockholders' Equity	305,330	381,248
Noncontrolling interests	809	1,363
Total Equity	306,139	382,611
Total Liabilities and Equity	$ 1,439,208	$ 1,642,142

XML

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Common stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	2,010,000,000	2,010,000,000
Common stock, shares issued (in shares)	767,155,735	760,939,440
Common stock, shares outstanding (in shares)	566,664,464	569,084,312
Treasury Stock
Treasury stock (in shares)	200,491,271	191,855,128

XML

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue:
Total revenue	$ 532,577	$ 617,396	$ 1,110,987	$ 1,243,936
Cost of revenue:
Total cost of revenue	240,445	293,738	512,839	595,393
Gross profit	292,132	323,658	598,148	648,543
Operating expenses:
Marketing	88,923	94,178	182,320	193,334
Selling, general and administrative	210,348	293,725	420,772	516,069
Total operating expenses	299,271	387,903	603,092	709,403
Income (loss) from operations	(7,139)	(64,245)	(4,944)	(60,860)
Other income (expense), net	(28,494)	(26,457)	(75,349)	(34,972)
Income (loss) from continuing operations before provision (benefit) for income taxes	(35,633)	(90,702)	(80,293)	(95,832)
Provision (benefit) for income taxes	2,012	1,552	(1,478)	(783)
Income (loss) from continuing operations	(37,645)	(92,254)	(78,815)	(95,049)
Income (loss) from discontinued operations, net of tax	0	0	2,162	0
Net income (loss)	(37,645)	(92,254)	(76,653)	(95,049)
Net income attributable to noncontrolling interests	(2,601)	(2,780)	(6,080)	(6,873)
Net income (loss) attributable to Groupon, Inc.	$ (40,246)	$ (95,034)	$ (82,733)	$ (101,922)
Basic and diluted net income (loss) per share:
Continuing operations (in usd per share)	$ (0.07)	$ (0.17)	$ (0.15)	$ (0.18)
Discontinued operations (in usd per share)	0.00	0.00	0.01	0.00
Basic and diluted net income (loss) per share (in usd per share)	$ (0.07)	$ (0.17)	$ (0.14)	$ (0.18)
Weighted average number of shares outstanding
Basic (in shares)	567,962,461	565,284,705	569,014,065	563,502,954
Diluted (in shares)	567,962,461	565,284,705	569,014,065	563,502,954
Comprehensive income (loss):
Net change in unrealized gain (loss) on foreign currency translation adjustments	$ (3,285)	$ 2,806	$ (13)	$ 1,238
Net change in unrealized gain (loss) on available-for-sale securities (net of tax effect of ($48) and $0 for the three months ended June 30, 2019 and 2018, and ($35) and $0 for the six months ended June 30, 2019 and 2018)	(145)	(435)	(104)	(936)
Other comprehensive income (loss)	(3,430)	2,371	(117)	302
Comprehensive income (loss)	(41,075)	(89,883)	(76,770)	(94,747)
Comprehensive income (loss) attributable to noncontrolling interest	(2,601)	(2,780)	(6,080)	(6,873)
Comprehensive income (loss) attributable to Groupon, Inc.	(43,676)	(92,663)	(82,850)	(101,620)
Service
Revenue:
Total revenue	277,603	295,652	563,430	597,449
Cost of revenue:
Total cost of revenue	28,595	30,230	57,222	61,375
Product
Revenue:
Total revenue	254,974	321,744	547,557	646,487
Cost of revenue:
Total cost of revenue	211,850	263,508	455,617	534,018
Continuing Operations
Comprehensive income (loss):
Other comprehensive income (loss)	(3,430)	2,371	(117)	302
Discontinued Operations, Disposed of by Sale
Comprehensive income (loss):
Other comprehensive income (loss)	$ 0	$ 0	$ 0	$ 0

XML

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Net change in unrealized gain (loss) on available-for-sale securities (net of tax effect of ($48) and $0 for the three months ended June 30, 2019 and 2018, and ($35) and $0 for the six months ended June 30, 2019 and 2018)	$ (48)	$ 0	$ (35)	$ 0

XML

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Total Groupon, Inc. Stockholders' Equity	Non-controlling Interests	Accounting Standards Update 2018-02 Accumulated Deficit
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, par value $0.0001 per share, 2,010,000,000 shares authorized; 767,155,735 shares issued and 566,664,464 shares outstanding at June 30, 2019; 760,939,440 shares issued and 569,084,312 shares outstanding at December 31, 2018		$ 75
Additional paid-in capital			$ 2,174,708
Accumulated deficit					$ (1,088,204)
Accumulated other comprehensive income (loss)						$ 31,844
Noncontrolling interests								$ 872
Beginning balance (in shares) at Dec. 31, 2017		748,541,862
Treasury stock, beginning balance (in shares) at Dec. 31, 2017				(188,602,242)
Treasury stock, beginning balance at Dec. 31, 2017				$ (867,450)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	$ 88,945				88,945		$ 88,945		$ (161)
Reclassification for impact of U.S. tax rate change						161
Beginning balance at Dec. 31, 2017	251,845						250,973
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss) attributable to noncontrolling interest	(2,795)				(6,888)			4,093
Net income (loss) attributable to parent							(6,888)
Foreign currency translation	(1,568)					(1,568)	(1,568)
Unrealized gain (loss) on available-for-sale securities, net of tax	(501)					(501)	(501)
Exercise in stock options (in shares)		2,400
Exercise of stock options	6		6				6
Vesting of restricted stock units and performance share units (in shares)		4,157,462
Vesting of restricted stock units and performance share units	0
Shares issued under employee stock purchase plan (in shares)		746,773
Shares issued under employee stock purchase plan	2,434		2,434				2,434
Shares issued to settle liability-classified awards (in shares)		1,240,379
Shares issues to settle liability-classified awards	6,436		6,436				6,436
Tax withholdings related to net share settlements of stock-based compensation awards (in shares)		(2,024,590)
Tax withholdings related to net share settlements of stock-based compensation awards	(9,355)		(9,355)				(9,355)
Stock-based compensation on equity-classified awards	18,240		18,240				18,240
Distributions to noncontrolling interest holders	(3,315)							(3,315)
Ending balance (in shares) at Mar. 31, 2018		752,664,286
Ending balance at Mar. 31, 2018	350,372						348,722
Treasury stock, ending balance (in shares) at Mar. 31, 2018				(188,602,242)
Treasury stock, ending balance at Mar. 31, 2018				$ (867,450)
Beginning balance (in shares) at Dec. 31, 2017		748,541,862
Treasury stock, beginning balance (in shares) at Dec. 31, 2017				(188,602,242)
Treasury stock, beginning balance at Dec. 31, 2017				$ (867,450)
Beginning balance at Dec. 31, 2017	251,845						250,973
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss) attributable to noncontrolling interest	(95,049)
Net income (loss) attributable to parent	(101,922)
Foreign currency translation	1,238
Shares issued under employee stock purchase plan (in shares)		746,773
Ending balance (in shares) at Jun. 30, 2018		755,806,627
Ending balance at Jun. 30, 2018	271,137						270,332
Treasury stock, ending balance (in shares) at Jun. 30, 2018				(188,602,242)
Treasury stock, ending balance at Jun. 30, 2018				$ (867,450)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, par value $0.0001 per share, 2,010,000,000 shares authorized; 767,155,735 shares issued and 566,664,464 shares outstanding at June 30, 2019; 760,939,440 shares issued and 569,084,312 shares outstanding at December 31, 2018		$ 75
Additional paid-in capital			2,192,469
Accumulated deficit					(1,006,308)
Accumulated other comprehensive income (loss)						29,936
Noncontrolling interests								1,650
Beginning balance (in shares) at Mar. 31, 2018		752,664,286
Treasury stock, beginning balance (in shares) at Mar. 31, 2018				(188,602,242)
Treasury stock, beginning balance at Mar. 31, 2018				$ (867,450)
Beginning balance at Mar. 31, 2018	350,372						348,722
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss) attributable to noncontrolling interest	(92,254)				(95,034)			2,780
Net income (loss) attributable to parent	(95,034)						(95,034)
Foreign currency translation	2,806					2,806	2,806
Unrealized gain (loss) on available-for-sale securities, net of tax	(435)					(435)	(435)
Exercise in stock options (in shares)		665,343
Exercise of stock options	64		64				64
Vesting of restricted stock units and performance share units (in shares)		3,628,257
Vesting of restricted stock units and performance share units	0	$ 1	(1)
Tax withholdings related to net share settlements of stock-based compensation awards (in shares)		(1,151,259)
Tax withholdings related to net share settlements of stock-based compensation awards	(5,144)		(5,144)				(5,144)
Stock-based compensation on equity-classified awards	19,353		19,353				19,353
Distributions to noncontrolling interest holders	(3,625)							(3,625)
Ending balance (in shares) at Jun. 30, 2018		755,806,627
Ending balance at Jun. 30, 2018	271,137						270,332
Treasury stock, ending balance (in shares) at Jun. 30, 2018				(188,602,242)
Treasury stock, ending balance at Jun. 30, 2018				$ (867,450)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, par value $0.0001 per share, 2,010,000,000 shares authorized; 767,155,735 shares issued and 566,664,464 shares outstanding at June 30, 2019; 760,939,440 shares issued and 569,084,312 shares outstanding at December 31, 2018		$ 76
Additional paid-in capital			2,206,741
Accumulated deficit					(1,101,342)
Accumulated other comprehensive income (loss)						32,307
Noncontrolling interests								805
Common stock, par value $0.0001 per share, 2,010,000,000 shares authorized; 767,155,735 shares issued and 566,664,464 shares outstanding at June 30, 2019; 760,939,440 shares issued and 569,084,312 shares outstanding at December 31, 2018	76	$ 76
Additional paid-in capital	2,234,560		2,234,560
Accumulated deficit	(1,010,499)				(1,010,499)
Accumulated other comprehensive income (loss)	34,602					34,602
Noncontrolling interests	1,363							1,363
Beginning balance (in shares) at Dec. 31, 2018		760,939,440
Treasury stock, beginning balance (in shares) at Dec. 31, 2018				(191,855,128)
Treasury stock, beginning balance at Dec. 31, 2018	877,491			$ (877,491)
Beginning balance at Dec. 31, 2018	382,611						381,248
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss) attributable to noncontrolling interest	(39,008)				(42,487)			3,479
Net income (loss) attributable to parent							(42,487)
Foreign currency translation	3,272					3,272	3,272
Unrealized gain (loss) on available-for-sale securities, net of tax	41					41	41
Exercise in stock options (in shares)		12,500
Exercise of stock options	8		8				8
Vesting of restricted stock units and performance share units (in shares)		4,160,415
Vesting of restricted stock units and performance share units	0
Shares issued under employee stock purchase plan (in shares)		719,297
Shares issued under employee stock purchase plan	1,998		1,998				1,998
Tax withholdings related to net share settlements of stock-based compensation awards (in shares)		(1,585,728)
Tax withholdings related to net share settlements of stock-based compensation awards	(5,681)		(5,681)				(5,681)
Purchases of treasury stock (in shares)				(4,407,995)
Purchases of treasury stock	(15,055)			$ (15,055)			(15,055)
Stock-based compensation on equity-classified awards	17,731		17,731				17,731
Distributions to noncontrolling interest holders	(3,521)							(3,521)
Ending balance (in shares) at Mar. 31, 2019		764,245,924
Ending balance at Mar. 31, 2019	342,396						341,075
Treasury stock, ending balance (in shares) at Mar. 31, 2019				(196,263,123)
Treasury stock, ending balance at Mar. 31, 2019				$ (892,546)
Beginning balance (in shares) at Dec. 31, 2018		760,939,440
Treasury stock, beginning balance (in shares) at Dec. 31, 2018				(191,855,128)
Treasury stock, beginning balance at Dec. 31, 2018	877,491			$ (877,491)
Beginning balance at Dec. 31, 2018	382,611						381,248
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss) attributable to noncontrolling interest	(76,653)
Net income (loss) attributable to parent	(82,733)
Foreign currency translation	$ (13)
Exercise in stock options (in shares)	42,500
Shares issued under employee stock purchase plan (in shares)		719,297
Ending balance (in shares) at Jun. 30, 2019		767,155,735
Ending balance at Jun. 30, 2019	$ 306,139						305,330
Treasury stock, ending balance (in shares) at Jun. 30, 2019				(200,491,271)
Treasury stock, ending balance at Jun. 30, 2019	907,599			$ (907,599)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, par value $0.0001 per share, 2,010,000,000 shares authorized; 767,155,735 shares issued and 566,664,464 shares outstanding at June 30, 2019; 760,939,440 shares issued and 569,084,312 shares outstanding at December 31, 2018		$ 76
Additional paid-in capital			2,248,616
Accumulated deficit					(1,052,986)
Accumulated other comprehensive income (loss)						37,915
Noncontrolling interests								1,321
Beginning balance (in shares) at Mar. 31, 2019		764,245,924
Treasury stock, beginning balance (in shares) at Mar. 31, 2019				(196,263,123)
Treasury stock, beginning balance at Mar. 31, 2019				$ (892,546)
Beginning balance at Mar. 31, 2019	342,396						341,075
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss) attributable to noncontrolling interest	(37,645)				(40,246)			2,601
Net income (loss) attributable to parent	(40,246)						(40,246)
Foreign currency translation	(3,285)					(3,285)	(3,285)
Unrealized gain (loss) on available-for-sale securities, net of tax	(145)					(145)	(145)
Exercise in stock options (in shares)		30,000
Exercise of stock options	32		32				32
Vesting of restricted stock units and performance share units (in shares)		4,404,213
Vesting of restricted stock units and performance share units	0
Tax withholdings related to net share settlements of stock-based compensation awards (in shares)		(1,524,402)
Tax withholdings related to net share settlements of stock-based compensation awards	(5,387)		(5,387)				(5,387)
Purchases of treasury stock (in shares)				(4,228,148)
Purchases of treasury stock	(15,053)			$ (15,053)			(15,053)
Stock-based compensation on equity-classified awards	28,339		28,339				28,339
Distributions to noncontrolling interest holders	(3,113)							(3,113)
Ending balance (in shares) at Jun. 30, 2019		767,155,735
Ending balance at Jun. 30, 2019	306,139						$ 305,330
Treasury stock, ending balance (in shares) at Jun. 30, 2019				(200,491,271)
Treasury stock, ending balance at Jun. 30, 2019	907,599			$ (907,599)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, par value $0.0001 per share, 2,010,000,000 shares authorized; 767,155,735 shares issued and 566,664,464 shares outstanding at June 30, 2019; 760,939,440 shares issued and 569,084,312 shares outstanding at December 31, 2018	76	$ 76
Additional paid-in capital	2,271,600		$ 2,271,600
Accumulated deficit	(1,093,232)				$ (1,093,232)
Accumulated other comprehensive income (loss)	34,485					$ 34,485
Noncontrolling interests	$ 809							$ 809

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018
Operating activities
Net income (loss)		$ (76,653)	$ (95,049)
Less: Income (loss) from discontinued operations, net of tax		2,162	0
Income (loss) from continuing operations		(78,815)	(95,049)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization of property, equipment and software		47,861	52,149
Amortization of acquired intangible assets		7,671	6,466
Stock-based compensation		42,974	35,644
Impairments of investments		0	10,044
Deferred income taxes		360	(6,575)
(Gain) loss from changes in fair value of investments		68,985	8,068
Amortization of debt discount on convertible senior notes		6,431	5,806
Change in assets and liabilities, net of acquisitions and dispositions:
Accounts receivable		(5,311)	27,296
Prepaid expenses and other current assets		(4,021)	1,489
Accounts payable		(10,890)	(9,340)
Accrued merchant and supplier payables		(186,519)	(172,982)
Accrued expenses and other current liabilities		(44,696)	51,140
Other, net		7,268	10,272
Net cash provided by (used in) operating activities from continuing operations		(148,702)	(75,572)
Net cash provided by (used in) operating activities from discontinued operations		0	0
Net cash provided by (used in) operating activities		(148,702)	(75,572)
Investing activities
Purchases of property and equipment and capitalized software		(34,161)	(37,517)
Acquisition of business, net of acquired cash		0	(57,821)
Acquisitions of intangible assets and other investing activities		(1,189)	(758)
Net cash provided by (used in) investing activities from continuing operations		(35,350)	(96,096)
Net cash provided by (used in) investing activities from discontinued operations		0	0
Net cash provided by (used in) investing activities		(35,350)	(96,096)
Financing activities
Issuance costs for revolving credit agreement		(2,334)	0
Payments for purchases of treasury stock		(29,569)	0
Taxes paid related to net share settlements of stock-based compensation awards		(10,231)	(16,138)
Proceeds from stock option exercises and employee stock purchase plan		2,038	2,504
Distributions to noncontrolling interest holders		(6,634)	(6,940)
Payments of finance lease obligations		(12,628)
Payments of finance lease obligations			(17,239)
Payments of contingent consideration related to acquisitions		0	1,815
Net cash provided by (used in) financing activities		(59,358)	(39,628)
Effect of exchange rate changes on cash, cash equivalents and restricted cash, including cash classified within current assets		(1,755)	(6,644)
Net increase (decrease) in cash, cash equivalents and restricted cash, including cash classified within current assets		(245,165)	(217,940)
Less: Net increase (decrease) in cash classified within current assets of discontinued operations		0	0
Net increase (decrease) in cash, cash equivalents and restricted cash		(245,165)	(217,940)
Cash, cash equivalents and restricted cash, beginning of period		844,728	885,481
Cash, cash equivalents and restricted cash, end of period (1)	[1]	599,563	667,541
Non-cash investing and financing activities
Equipment acquired under capital lease arrangements (2)	[2]	0	9,581
Leasehold improvements funded by lessor		0	557
Leasehold improvements funded by lessor		(995)	0
Increase (decrease) in liabilities related to purchases of property and equipment and capitalized software		(767)	(789)
Financing obligation incurred in connection with acquisition of business		0	8,604
Restricted Cash [Abstract]
Cash, cash equivalents and restricted cash		$ 844,728	$ 885,481

[1] The following table provides a reconciliation of cash, cash equivalents and restricted cash shown above to amounts reported within the condensed consolidated balance sheet as of June 30, 2019 and December 31, 2018 and amounts previously reported within the condensed consolidated balance sheet in our Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2018 (in thousands):   June 30, 2019   June 30, 2018   December 31, 2018 Cash and cash equivalents $ 596,837
  $ 662,893
  $ 841,021
Restricted cash included in prepaid expenses and other current assets 2,340
  4,250
  3,320
Restricted cash included in other non-current assets 386
  398
  387
Cash, cash equivalents and restricted cash $ 599,563
  $ 667,541
  $ 844,728

[2] Please refer to Note 6, Leases, for supplemental cash flow information on our leasing obligations, as required by our adoption of ASU 2016-02, Leases ("Topic 842"), on January 1, 2019.

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DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

6 Months Ended

Jun. 30, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

Company Information

Groupon, Inc. and its subsidiaries, which commenced operations in October 2008, operate online local commerce marketplaces throughout the world that connect merchants to consumers by offering goods and services, generally at a discount. Customers access those marketplaces through our websites, primarily localized groupon.com sites in many countries, and our mobile applications.

Our operations are organized into two segments: North America and International. See Note 13, Segment Information.

Unaudited Interim Financial Information

We have prepared the accompanying condensed consolidated financial statements pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC") for interim financial reporting. These condensed consolidated financial statements are unaudited and, in our opinion, include all adjustments, consisting of normal recurring adjustments and accruals, necessary for a fair presentation of the condensed consolidated balance sheets, statements of operations and comprehensive income (loss), cash flows and stockholders' equity for the periods presented. Operating results for the periods presented are not necessarily indicative of the results to be expected for the full year ending December 31, 2019. Certain information and disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles ("U.S. GAAP") have been omitted in accordance with the rules and regulations of the SEC. These condensed consolidated financial statements and notes should be read in conjunction with the audited consolidated financial statements and notes included in our Annual Report on Form 10-K for the year ended December 31, 2018, filed with the SEC on February 12, 2019.

Principles of Consolidation

The condensed consolidated financial statements include the accounts of Groupon, Inc. and its subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The condensed consolidated financial statements were prepared in accordance with U.S. GAAP and include the assets, liabilities, revenue and expenses of all wholly-owned subsidiaries and majority-owned subsidiaries over which we exercise control and a variable interest entity for which we have determined that we are the primary beneficiary. In the first quarter of 2019, we extended our arrangement through July 2022 with the strategic partner in the variable interest entity that we consolidate. Outside stockholders' interests in subsidiaries are shown on the condensed consolidated financial statements as Noncontrolling interests. Investments in entities in which we do not have a controlling financial interest are accounted for under the equity method, the fair value option, as available-for-sale securities or at cost adjusted for observable price changes and impairments, as appropriate.

Adoption of New Accounting Standards

We adopted the guidance in ASU 2016-02, Leases (Topic 842) on January 1, 2019. This ASU requires the recognition of lease assets and liabilities for operating leases, in addition to the finance lease assets and liabilities historically recorded on our condensed consolidated balance sheets. See Note 6, Leases, for information on the impact of adopting Topic 842 on our accounting policies.

We adopted the guidance in ASU 2018-07, Compensation - Stock Compensation (Topic 718) - Improvements to Nonemployee Share-Based Payment Accounting, on January 1, 2019. This ASU expands the scope to make the guidance for share-based payment awards to nonemployees consistent with the guidance for share-based payment awards to employees. The adoption of ASU 2018-07 did not have a material impact on the condensed consolidated financial statements.

We adopted the guidance in ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40) - Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, on January 1, 2019. This ASU requires entities in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40, Internal Use Software, to determine which costs to implement the service contract would be capitalized as an asset related to the service contract and which costs would be expensed. The requirements of ASU 2018-15 have been applied on a prospective basis to implementation costs incurred on or after January 1, 2019. As a result of the adoption of ASU 2018-15, we capitalized $1.9 million and $2.8 million of implementation costs for the three and six months ended June 30, 2019. Those capitalized costs are included within Other non-current assets on the condensed consolidated balance sheet as of June 30, 2019. We have not recognized any amortization related to these implementation costs. We will amortize the implementation costs on a straight-line basis over the term of the associated hosting arrangement for each module or component of the related hosting arrangement when it is ready for its intended use. Amortization costs will be recorded in Selling, general and administrative expense on the condensed consolidated statements of operations.

Reclassifications and Terminology Changes

Certain reclassifications have been made to the condensed consolidated financial statements of prior periods and the accompanying notes to conform to the current period presentation.

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires estimates and assumptions that affect the reported amounts and classifications of assets and liabilities, revenue and expenses, and the related disclosures of contingent liabilities in the condensed consolidated financial statements and accompanying notes. Estimates are used for, but not limited to, variable consideration from unredeemed vouchers, income taxes, initial valuation and subsequent impairment testing of goodwill and intangible assets, investments, customer refunds, contingent liabilities and the useful lives of property, equipment and software and intangible assets. Actual results could differ materially from those estimates.

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GOODWILL AND OTHER INTANGIBLE ASSETS

6 Months Ended

Jun. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND OTHER INTANGIBLE ASSETS

GOODWILL AND OTHER INTANGIBLE ASSETS

The following table summarizes goodwill activity by segment for the six months ended June 30, 2019 (in thousands):

	North America		International			Consolidated
Balance as of December 31, 2018	$	178,685	$	146,806		$	325,491
Foreign currency translation	—		(786		)	(786		)
Balance as of June 30, 2019	$	178,685	$	146,020		$	324,705

The following table summarizes intangible assets as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019						December 31, 2018
Asset Category	Gross Carrying Value		Accumulated Amortization		Net Carrying Value		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Customer relationships	$	16,200	$	14,400	$	1,800	$	16,200	$	11,700	$	4,500
Merchant relationships	21,486		6,157		15,329		21,554		4,105		17,449
Trade names	9,467		7,074		2,393		9,476		6,799		2,677
Developed technology	13,813		13,601		212		13,825		13,485		340
Patents	21,744		17,254		4,490		20,508		16,451		4,057
Other intangible assets	26,091		11,319		14,772		26,007		9,629		16,378
Total	$	108,801	$	69,805	$	38,996	$	107,570	$	62,169	$	45,401

Amortization of intangible assets is computed using the straight-line method over their estimated useful lives, which range from 1 to 10 years. Amortization expense related to intangible assets was $3.8 million and $3.5 million for the three months ended June 30, 2019 and 2018, and $7.7 million and $6.4 million for the six months ended June 30, 2019 and 2018. As of June 30, 2019, estimated future amortization expense related to intangible assets is as follows (in thousands):

Remaining amounts in 2019	$	6,384
2020	7,780
2021	7,046
2022	6,730
2023	5,582
Thereafter	5,474
Total	$	38,996

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INVESTMENTS

6 Months Ended

Jun. 30, 2019

Schedule of Equity Method Investments [Abstract]

INVESTMENTS

. INVESTMENTS

The following table summarizes investments as of June 30, 2019 and December 31, 2018 (dollars in thousands):

	June 30, 2019		Percent Ownership of Voting Stock			December 31, 2018		Percent Ownership of Voting Stock
Available-for-sale securities - redeemable preferred shares	$	10,201	19%	to	25%	$	10,340	19%	to	25%
Fair value option investments	4,917		10%	to	19%	73,902		10%	to	19%
Other equity investments	24,183		1%	to	19%	24,273		1%	to	19%
Total investments	$	39,301				$	108,515

Available-for-Sale Securities - Redeemable Preferred Shares

The following table summarizes amortized cost, gross unrealized gain, gross unrealized loss and fair value of redeemable preferred shares as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Amortized cost	$	9,961	$	9,961
Gross unrealized gain (loss)	240		379
Fair value	$	10,201	$	10,340

We recorded other-than-temporary impairments of available-for-sale securities of $4.6 million and $5.4 million for the three and six months ended June 30, 2018. Those impairments are classified within Other income (expense), net on the condensed consolidated statements of operations. There were no impairments of available-for-sale securities for the three and six months ended June 30, 2019.

Fair Value Option Investments    

In connection with the dispositions of controlling stakes in TMON Inc. ("TMON"), an entity based in the Republic of Korea, in May 2015 and Groupon India in August 2015, we obtained minority investments in Monster Holdings LP ("Monster LP") and in Nearbuy Pte Ltd. ("Nearbuy"), respectively. We have made an irrevocable election to account for both of those investments at fair value with changes in fair value reported in earnings. We elected to apply fair value accounting to those investments because we believe that fair value is the most relevant measurement attribute for those investments, and to reduce operational and accounting complexity. Our election to apply fair value accounting to those investments has and may continue to cause fluctuations in our earnings from period to period.

We determined that the fair value of our investments in Monster LP and Nearbuy were $0.0 million and $4.9 million, respectively, as of June 30, 2019 and $69.4 million and $4.5 million, respectively, as of December 31, 2018.The following table summarizes gains and losses due to changes in fair value of those investments for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Monster LP	$	(27,949	)	$	(3,054	)	$	(69,408	)	$	(8,285	)
Nearbuy	372			19			423			217
Total	$	(27,577	)	$	(3,035	)	$	(68,985	)	$	(8,068	)

During the first quarter 2019, we recognized a $41.5 million loss from changes in the fair value of our investment in Monster LP due to the revised cash flow projections provided by TMON in March 2019 and an increase in the discount rate applied to those forecasts, which increased to 26.0% as of March 31, 2019, as compared with 21.0% as of December 31, 2018. The increase in the discount rate applied as of March 31, 2019 was due to the deterioration in the financial condition of TMON and the competitive environment in the Korean e-commerce industry, which resulted in an increase to financial projection risk. During the second quarter 2019, we recognized an additional loss of $27.9 million from changes in the fair value of our investment in Monster LP due to revised financial projections provided by TMON in June 2019. The revisions to the financial projections were made as a result of TMON’s continued underperformance as compared with prior projections along with adjustments to their business model.

The following table summarizes the condensed financial information for Monster LP for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Revenue	$	131,816		$	84,525		$	252,016		$	171,384
Gross profit	9,542			6,574			17,407			13,811
Loss before income taxes	(31,253		)	(35,447		)	(60,324		)	(68,867		)
Net loss	(31,253		)	(35,447		)	(60,324		)	(68,867		)

Other Equity Investments

Other equity investments represents equity investments without readily determinable fair values. We have elected to record equity investments without readily determinable fair values at cost adjusted for observable price changes and impairments. We recorded a $4.6 million impairment of an other equity investment for the three and six months ended June 30, 2018. That impairment is classified within Other income (expense), net on the condensed consolidated statements of operations. There were no other adjustments for observable price changes related to these investments since our adoption of ASU 2016-01, Financial Instruments (Topic 825-10) - Recognition and Measurement of Financial Assets and Financial Liabilities, on January 1, 2018.

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SUPPLEMENTAL CONSOLIDATED BALANCE SHEETS AND STATEMENTS OF OPERATIONS INFORMATION

6 Months Ended

Jun. 30, 2019

Supplemental Consolidated Balance Sheet & Statement of Operations Information [Abstract]

SUPPLEMENTAL CONSOLIDATED BALANCE SHEETS AND STATEMENTS OF OPERATIONS INFORMATION

SUPPLEMENTAL CONDENSED CONSOLIDATED BALANCE SHEETS AND STATEMENTS OF OPERATIONS INFORMATION

The following table summarizes other income (expense), net for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Interest income	$	1,915		$	1,836		$	3,851		$	3,345
Interest expense	(5,442		)	(5,228		)	(11,133		)	(10,721		)
Changes in fair value of investments	(27,577		)	(3,035		)	(68,985		)	(8,068		)
Foreign currency gains (losses), net	2,609			(12,533		)	930			(11,135		)
Impairments of investments	—			(9,189		)	—			(10,044		)
Other	1			1,692			(12		)	1,651
Other income (expense), net	$	(28,494	)	$	(26,457	)	$	(75,349	)	$	(34,972	)

The following table summarizes prepaid expenses and other current assets as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Merchandise inventories	$	29,235	$	33,739
Prepaid expenses	32,414		28,209
Income taxes receivable	6,693		6,717
Other	22,714		19,450
Total prepaid expenses and other current assets	$	91,056	$	88,115

The following table summarizes accrued merchant and supplier payables as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Accrued merchant payables	$	333,441	$	371,279
Accrued supplier payables (1)	130,684		280,502
Total accrued merchant and supplier payables	$	464,125	$	651,781

(1) Amounts include payables to suppliers of inventories and providers of shipping and fulfillment services.

The following table summarizes accrued expenses and other current liabilities as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Refunds reserve	$	19,812	$	27,957
Compensation and benefits	56,600		56,173
Accrued marketing	29,227		39,094
Customer credits	17,516		15,118
Income taxes payable	5,320		8,987
Deferred revenue	19,949		25,452
Current portion of lease obligations (1)	43,033		17,207
Other	67,153		77,046
Total accrued expenses and other current liabilities	$	258,610	$	267,034

(1) Current portion of lease obligations as of June 30, 2019 includes $25.0 million of additional lease obligations that were recognized on January 1, 2019 as a result of the adoption of Topic 842. Refer to Note 6, Leases, for additional information.

The following table summarizes other non-current liabilities as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Contingent income tax liabilities	$	32,756	$	39,858
Deferred rent (1)	—		32,186
Deferred income taxes	4,164		6,619
Other	16,820		22,025
Total other non-current liabilities	$	53,740	$	100,688

(1)

Non-current operating lease liabilities as of June 30, 2019 are included within Operating lease obligations on the condensed consolidated balance sheet as a result of the adoption of Topic 842 on January 1, 2019. Refer to Note 6, Leases, for additional information.

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FINANCING ARRANGEMENTS

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

FINANCING ARRANGEMENTS

FINANCING ARRANGEMENTS

Convertible Senior Notes

On April 4, 2016, we issued $250.0 million in aggregate principal amount of convertible senior notes (the "Notes") in a private placement to A-G Holdings, L.P. ("AGH"). Michael Angelakis, the chairman and chief executive officer of Atairos Group, Inc. ("Atairos"), joined our Board of Directors (the "Board") in connection with the issuance of the Notes. Atairos controls the voting power of AGH. The net proceeds from this offering were $243.2 million after deducting issuance costs. The Notes bear interest at a rate of 3.25% per annum, payable annually in arrears on April 1 of each year, beginning on April 1, 2017. The Notes will mature on April 1, 2022, subject to earlier conversion or redemption.

Each $1,000 of principal amount of the Notes initially is convertible into 185.1852 shares of common stock, which is equivalent to an initial conversion price of $5.40 per share, subject to adjustment upon the occurrence of specified events. Upon conversion, we can elect to settle the conversion value in cash, shares of our common stock, or any combination of cash and shares of our common stock. Holders of the Notes may convert their Notes at their option at any time until the close of business on the scheduled trading day immediately preceding the maturity date. In addition, if specified corporate events occur prior to the maturity date, we may be required to increase the conversion rate for holders who elect to convert based on the effective date of such event and the applicable stock price attributable to the event, as set forth in a table contained in the indenture governing the Notes (the "Indenture"). Based on the closing price of the common stock of $3.58 as of June 30, 2019, the if-converted value of the Notes was less than the principal amount.

With certain exceptions, upon a fundamental change (as defined in the Indenture), the holders of the Notes may require us to repurchase all or a portion of their Notes for cash at a purchase price equal to the principal amount plus accrued and unpaid interest. In addition, we may redeem the Notes, at our option, at a purchase price equal to the principal amount plus accrued and unpaid interest on or after April 1, 2020, if the closing sale price of the common stock exceeds 150% of the then-current conversion price for 20 or more trading days in the 30 consecutive trading-day period preceding the exercise of this redemption right.

The Notes are senior unsecured obligations that rank equal in right of payment to all senior unsecured indebtedness and rank senior in right of payment to any indebtedness that is contractually subordinated to the Notes.

The Indenture includes customary events of default. If an event of default, as defined in the Indenture, occurs and is continuing, the principal amount of the Notes and any accrued and unpaid interest may be declared immediately due and payable. In the case of bankruptcy or insolvency, the principal amount of the Notes and any accrued and unpaid interest would automatically become immediately due and payable.

We have separated the Notes into their liability and equity components in the accompanying condensed consolidated balance sheets. The carrying amount of the liability component was calculated by measuring the fair value of a similar liability that does not have an associated conversion feature. The carrying amount of the equity component, representing the conversion option, was determined by deducting the fair value of the liability component from the principal amount of the Notes. The difference between the principal amount of the Notes and the liability component (the "debt discount") is amortized to interest expense at an effective interest rate of 9.75% over the term of the Notes. The equity component of the Notes is included in additional paid-in capital in the condensed consolidated balance sheets and is not remeasured as long as it continues to meet the conditions for equity classification.

We incurred transaction costs of approximately $6.8 million related to the issuance of the Notes. Those transaction costs were allocated to the liability and equity components in the same manner as the allocation of the proceeds from the Notes. Transaction costs attributable to the liability component of $4.8 million were recorded as a debt discount in the condensed consolidated balance sheet and are being amortized to interest expense over the term of the Notes. Transaction costs attributable to the equity component of $2.0 million were recorded in stockholders' equity as a reduction of the equity component.

The carrying amount of the Notes consisted of the following as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019			December 31, 2018
Liability component:
Principal amount	$	250,000		$	250,000
Less: debt discount	(41,900		)	(48,331		)
Net carrying amount of liability component	$	208,100		$	201,669
Net carrying amount of equity component	$	67,014		$	67,014

The estimated fair value of the Notes as of June 30, 2019 and December 31, 2018 was $267.1 million and $257.1 million, and was determined using a lattice model. We classified the fair value of the Notes as a Level 3 measurement due to the lack of observable market data over fair value inputs such as our stock price volatility over the term of the Notes and our cost of debt.

As of June 30, 2019, the remaining term of the Notes is approximately 2 years and 9 months. During the three and six months ended June 30, 2019 and 2018, we recognized interest costs on the Notes as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Contractual interest (3.25% of the principal amount per annum)	$	2,032	$	2,032	$	4,064	$	4,064
Amortization of debt discount	3,256		2,940		6,431		5,806
Total	$	5,288	$	4,972	$	10,495	$	9,870

Note Hedges and Warrants

In May 2016, we purchased convertible note hedges with respect to our common stock for a cost of $59.1 million from certain bank counterparties. The convertible note hedges provide us with the right to purchase up to 46.3 million shares of our common stock at an initial strike price of $5.40 per share, which corresponds to the initial conversion price of the Notes, and are exercisable upon conversion of the Notes. The convertible note hedges are intended to reduce the potential economic dilution upon conversion of the Notes. The convertible note hedges are separate transactions and are not part of the terms of the Notes. Holders of the Notes do not have any rights with respect to the convertible note hedges.

In May 2016, we also sold warrants for total cash proceeds of $35.5 million to certain bank counterparties. The warrants provide the counterparties with the right to purchase up to 46.3 million shares of our common stock at a strike price of $8.50 per share. The warrants expire on various dates between July 1, 2022 and August 26, 2022 and are exercisable on their expiration dates. The warrants are separate transactions and are not part of the terms of the Notes or convertible note hedges. Holders of the Notes and convertible note hedges do not have any rights with respect to the warrants.

The amounts paid and received for the convertible note hedges and warrants were recorded in additional paid-in capital in the condensed consolidated balance sheets as of June 30, 2019 and December 31, 2018. The convertible note hedges and warrants are not remeasured as long as they continue to meet the conditions for equity classification. The amounts paid for the convertible note hedges are tax deductible over the term of the Notes, while the proceeds received from the warrants are not taxable. 

Under the if-converted method, the shares of common stock underlying the conversion option in the Notes are included in the diluted earnings per share denominator and the interest expense on the Notes, net of tax, is added to the numerator. However, upon conversion, there will be no economic dilution from the Notes, as exercise of the convertible note hedges eliminates any dilution from the Notes that would have otherwise occurred when the price of our common stock exceeds the conversion price. Taken together, the purchase of the convertible note hedges and sale of warrants are intended to offset any actual dilution from the conversion of the Notes and to effectively increase the overall conversion price from $5.40 to $8.50 per share.

Revolving Credit Agreement

In May 2019, we entered into a second amended and restated senior secured revolving credit agreement (the "2019 Credit Agreement") which provides for aggregate principal borrowings of up to $400.0 million and matures in May 2024. The 2019 Credit Agreement replaced our previous $250.0 million amended and restated credit agreement that was scheduled to mature in June 2019 (the "2016 Credit Agreement"). We recorded a liability for debt issuance costs of $2.3 million related to the 2019 Credit Agreement. Those costs will be amortized to interest expense over the term of the agreement.

Borrowings under the 2019 Credit Agreement bear interest, at our option, at a rate per annum equal to (a) an adjusted LIBO rate or (b) a customary base rate (with loans denominated in certain currencies bearing interest at rates specific to such currencies) plus an additional margin ranging between 0.50% and 2.00%. We are required to pay quarterly commitment fees ranging from 0.25% to 0.35% per annum of the average daily amount of unused commitments available under the 2019 Credit Agreement. The 2019 Credit Agreement also provides for the issuance of up to $75.0 million in letters of credit, provided that the sum of outstanding borrowings and letters of credit do not exceed the maximum funding commitment of $400.0 million.

The 2019 Credit Agreement is secured by substantially all of our tangible and intangible assets, including a pledge of 100% of the outstanding capital stock of substantially all of our direct and indirect domestic subsidiaries and 65% of the shares or equity interests of first-tier foreign subsidiaries and each U.S. entity whose assets substantially consist of capital stock and/or intercompany debt of one or more foreign subsidiaries, subject to certain exceptions. Certain of our domestic subsidiaries are guarantors under the 2019 Credit Agreement.

The 2019 Credit Agreement contains various customary restrictive covenants that limit our ability to, among other things: incur additional indebtedness; make dividend and other restricted payments, including share repurchases; enter into sale and leaseback transactions; make investments, loans or advances; grant or incur liens on assets; sell assets; engage in mergers, consolidations, liquidations or dissolutions; and engage in transactions with affiliates. The 2019 Credit Agreement requires us to maintain compliance with specified financial covenants, comprised of a minimum fixed charge coverage ratio, a maximum leverage ratio, a maximum senior secured leverage ratio and a minimum liquidity ratio, each as set forth in the 2019 Credit Agreement. We are also required to maintain, as of the last day of each fiscal quarter, unrestricted cash of at least $250.0 million, including $125.0 million in accounts held with lenders under the 2019 Credit Agreement or their affiliates. Non-compliance with these covenants may result in termination of the commitments under the 2019 Credit Agreement and any then outstanding borrowings may be declared due and payable immediately. We have the right to terminate the 2019 Credit Agreement or reduce the available commitments at any time.

As of June 30, 2019, we had no borrowings outstanding under the 2019 Credit Agreement and as of December 31, 2018, we had no borrowings outstanding under the 2016 Credit Agreement. As of June 30, 2019, we had outstanding letters of credit of $18.2 million under the 2019 Credit Agreement and as of December 31, 2018, we had outstanding letters of credit of $19.2 million under the 2016 Credit Agreement.

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LEASES

6 Months Ended

Jun. 30, 2019

Leases [Abstract]

LEASES

Adoption of ASC Topic 842, Leases

On January 1, 2019, we adopted ASC Topic 842 using the modified retrospective transition method. Topic 842 requires the recognition of lease assets and liabilities for operating leases, in addition to the finance lease assets and liabilities previously recorded on our condensed consolidated balance sheets. Beginning on January 1, 2019, our condensed consolidated financial statements are presented in accordance with the revised policies, while prior period amounts are not adjusted and continue to be reported in accordance with our historical policies. The modified retrospective transition method required the cumulative effect, if any, of initially applying the guidance to be recognized as an adjustment to our accumulated deficit as of our adoption date. As a result of adopting Topic 842, we recognized additional lease assets and liabilities of $109.6 million as of January 1, 2019. The discount rate used to calculate that adjustment was the rate implicit in the lease, unless that rate was not readily determinable. For leases for which the rate was not readily determinable, the discount rate used was our incremental borrowing rate as of the adoption date, January 1, 2019. There was no cumulative effect adjustment to our accumulated deficit as a result of initially applying the guidance.

We elected the package of practical expedients permitted under the transition guidance within Topic 842, which allowed us to carry forward prior conclusions about lease identification, classification and initial direct costs for leases entered into prior to adoption of Topic 842. Additionally, we elected to not separate lease and non-lease components for all of our leases. For leases with a term of 12 months or less, we elected the short-term lease exemption, which allowed us to not recognize right-of-use assets or lease liabilities for qualifying leases existing at transition and new leases we may enter into in the future.

General Description of Leases

We have entered into various non-cancelable operating lease agreements for our offices and data centers and non-cancelable finance lease agreements for property and equipment. We classify leases at their commencement as either operating or finance leases and may receive renewal or expansion options, rent holidays and leasehold improvement or other incentives on certain lease agreements.

Our operating leases primarily consist of leases for real estate throughout the world with lease expirations between 2019 and 2026. These arrangements typically do not transfer ownership of the underlying asset as we do not assume, nor do we intend to assume, the risks and rewards of ownership. Our finance leases are related to purchases of property and equipment, primarily computer hardware, with expirations between 2019 and 2023.

We recognize a right-of-use asset and lease liability for all of our leases at the commencement of the lease. Lease liabilities are measured based on the present value of the minimum lease payments discounted by a rate determined as of the date of commencement. Right-of-use assets are measured based on the lease liability adjusted for any initial direct costs, prepaid rent, or lease incentives. Minimum lease payments made under operating and finance leases are apportioned between interest expense and a reduction of the related operating and finance lease obligations. The interest expense on operating leases is presented within Selling, general and administrative expense on the condensed consolidated statements of operations and the related operating lease obligation is presented within Accrued expenses and other current liabilities and Operating lease obligations on the condensed consolidated balance sheets. The interest expense on finance leases is presented within Other income (expense), net on the condensed consolidated statements of operations and the related finance lease obligation is presented within Accrued expenses and other current liabilities and Other non-current liabilities on the condensed consolidated balance sheets.

We have also subleased certain office facilities under operating lease agreements, with expirations between 2019 and 2026. We recognize sublease rentals on a straight-line basis over their respective lease terms.

The following summarizes right-of-use assets as of June 30, 2019 (in thousands):

	June 30, 2019
Right-of-use assets - operating leases	$	127,305
Right-of-use assets - finance leases (1)	35,201
Total right-of-use assets, gross	162,506
Less: accumulated depreciation and amortization	(25,572		)
Right-of-use assets, net	$	136,934

(1) Right-of-use assets for finance leases are included in Property, equipment and software, net on the condensed consolidated balance sheet.

Related Party Sublease Agreement

On December 28, 2016, we entered into a sublease for portions of our office space at 600 West Chicago to Uptake, Inc. ("Uptake"), a Lightbank LLC ("Lightbank") portfolio company. Eric Lefkofsky, our co-founder and Chairman of the Board, is a co-founder and owns a significant equity interest in Lightbank. The sublease was a market rate transaction on terms that we believe are no less favorable than would have been reached with an unrelated third party. The sublease extends through January 31, 2026 and the sublease rentals over the entire term total approximately $18.2 million. Pursuant to our related party transaction policy, our Audit Committee approved the sublease. We recognized income from the sublease of $0.5 million and $0.5 million for the three months ended June 30, 2019 and 2018, and $1.2 million and $1.0 million for the six months ended June 30, 2019 and 2018.

Significant Assumptions and Judgments

Significant judgment is required when determining whether a contract is or contains a lease. We review contracts to determine whether the language conveys the right to control the use of an identified asset for a period of time in exchange for consideration.

As discussed above, the present value of minimum lease payments is used in determining the value of our operating and finance leases. The discount rate used to calculate the present value for lease payments is the rate implicit in the lease, unless that rate cannot be readily determined. For leases in which the rate implicit in the lease is not readily determinable, the discount rate is our incremental borrowing rate, which is determined based on information available at lease commencement and is equal to the rate of interest that we would have to pay to borrow on a collateralized basis over a similar term in an amount equal to the lease payments in a similar economic environment. The discount rate used for our lease obligations as of June 30, 2019 and January 1, 2019 ranged from 1.5% to 6.9%. As of June 30, 2019, the weighted-average remaining lease term for our finance leases and operating leases was 2 years and 5 years. As of June 30, 2019, the weighted-average discount rate for our finance leases and operating leases was 5.1% and 5.6%.

The following table summarizes our lease cost and sublease income for the three and six months ended June 30, 2019 (in thousands):

	Three Months Ended June 30, 2019			Six Months Ended June 30, 2019
Financing lease cost:
Amortization of right-of-use assets	$	5,999		$	12,755
Interest on lease liabilities	266			573
Total finance lease cost	6,265			13,328
Operating lease cost	8,737			17,211
Variable lease cost	1,825			3,909
Short-term lease cost	169			210
Sublease income, gross	(1,312		)	(2,624		)
Total lease cost	$	15,684		$	32,034

As of June 30, 2019, the future payments under finance leases and operating leases for each of the next five years and thereafter are as follows (in thousands):    

	Finance Leases			Operating Leases
Remaining in 2019	$	6,972		$	19,787
2020	8,971			35,994
2021	5,052			32,720
2022	715			31,962
2023	12			24,516
Thereafter	—			33,175
Total minimum lease payments	21,722			178,154
Less: Amount representing interest	(1,080		)	(24,761		)
Present value of net minimum lease payments	20,642			153,393
Less: Current portion of lease obligations	(11,166		)	(31,867		)
Total long-term lease obligations	$	9,476		$	121,526

As of June 30, 2019, the future amounts due under subleases for each of the next five years and thereafter are as follows (in thousands):

	Subleases
Remaining in 2019	$	2,603
2020	5,027
2021	5,065
2022	5,103
2023	4,385
Thereafter	4,891
Total future sublease income	$	27,074

The following table summarizes supplemental cash flow information on our leasing obligations for the six months ended June 30, 2019 (in thousands):

	Six Months Ended June 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$	573
Operating cash flows from operating leases	(13,145		)
Financing cash flows from finance leases	(12,628		)
Right-of-use assets obtained in exchange for lease liabilities:
Finance leases	2,872
Operating leases	17,853

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COMMITMENTS AND CONTINGENCIES

6 Months Ended

Jun. 30, 2019

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES

Our purchase obligations as of June 30, 2019 did not materially change from the amounts set forth in our 2018 Annual Report on Form 10-K.

Legal Matters and Other Contingencies

From time to time, we are party to various legal proceedings incident to the operation of our business. For example, we currently are involved in proceedings brought by former employees and merchants, intellectual property infringement suits, customer lawsuits, consumer class actions and suits alleging, among other things, violations of state consumer protection or privacy laws.

In addition, third parties have from time to time claimed, and others may claim in the future, that we have infringed their intellectual property rights. We are subject to intellectual property disputes, including patent infringement claims, and expect that we will continue to be subject to intellectual property infringement claims as our services expand in scope and complexity. In the past, we have litigated such claims, and we are presently involved in several patent infringement and other intellectual property-related claims, including pending litigation or trademark disputes relating to, for example, our Goods category, some of which could involve potentially substantial claims for damages or injunctive relief. We may also become more vulnerable to third-party claims as laws such as the Digital Millennium Copyright Act are interpreted by the courts, and we become subject to laws in jurisdictions where the underlying laws with respect to the potential liability of online intermediaries are either unclear or less favorable. We believe that additional lawsuits alleging that we have violated patent, copyright or trademark laws will be filed against us. Intellectual property claims, whether meritorious or not, are time consuming and often costly to resolve, could require expensive changes in our methods of doing business or the goods we sell, or could require us to enter into costly royalty or licensing agreements.

We also are subject to consumer claims or lawsuits relating to alleged violations of consumer protection or privacy rights and statutes, some of which could involve potentially substantial claims for damages, including statutory or punitive damages. Consumer and privacy related claims or lawsuits, whether meritorious or not, could be time consuming, result in costly litigation, damage awards, fines and penalties, injunctive relief or increased costs of doing business through adverse judgment or settlement, or require us to change our business practices, sometimes in expensive ways.

We are also subject to, or in the future may become subject to, a variety of regulatory inquiries, audits, and investigations across the jurisdictions where we conduct our business, including, for example, inquiries related to consumer protection, employment matters and/or hiring practices, marketing practices, tax, unclaimed property and privacy rules and regulations. Any regulatory actions against us, whether meritorious or not, could be time consuming, result in costly litigation, damage awards, fines and penalties, injunctive relief or increased costs of doing business through adverse judgment or settlement, require us to change our business practices in expensive ways, require significant amounts of management time, result in the diversion of significant operational resources or otherwise harm our business.

We establish an accrued liability for loss contingencies related to legal and regulatory matters when the loss is both probable and reasonably estimable. Those accruals represent management's best estimate of probable losses and, in such cases, there may be an exposure to loss in excess of the amounts accrued. For certain of the matters described above, there are inherent and significant uncertainties based on, among other factors, the stage of the proceedings, developments in the applicable facts of law, or the lack of a specific damage claim. However, we believe that the amount of reasonably possible losses in excess of the amounts accrued for those matters would not have a material adverse effect on our business, condensed consolidated financial position, results of operations or cash flows. Our accrued liabilities for loss contingencies related to legal and regulatory matters may change in the future as a result of new developments, including, but not limited to, the occurrence of new legal matters, changes in the law or regulatory environment, adverse or favorable rulings, newly discovered facts relevant to the matter, or changes in the strategy for the matter. Regardless of the outcome, litigation and other regulatory matters can have an adverse impact on us because of defense and settlement costs, diversion of management resources and other factors.

Indemnifications

In connection with the disposition of our operations in Latin America in the first quarter of 2017, we recorded $5.4 million in indemnification liabilities for certain tax and other matters upon the closing of the transactions as an adjustment to the net loss on the dispositions within discontinued operations at their fair value. We estimated the indemnification liabilities using a probability-weighted expected cash flow approach. During the first quarter of 2019, we decreased our indemnification liabilities due to the expiration of certain indemnification obligations. The resulting benefit of $2.2 million is recorded within Income (loss) from discontinued operations on the condensed consolidated statement of operations for the six months ended June 30, 2019. Our remaining indemnification liabilities were $3.2 million as of June 30, 2019. We estimate that the total amount of obligations that are reasonably possible to arise under the indemnifications in excess of amounts accrued as of June 30, 2019 is approximately $13.3 million.

In the normal course of business to facilitate transactions related to our operations, we indemnify certain parties, including employees, lessors, service providers, merchants, and counterparties to investment agreements and asset and stock purchase agreements with respect to various matters. We have agreed to hold certain parties harmless against losses arising from a breach of representations or covenants, or other claims made against those parties. These agreements may limit the time within which an indemnification claim can be made and the amount of the claim. We are also subject to increased exposure to various claims as a result of our divestitures and acquisitions, particularly in cases where we are entering into new businesses in connection with such acquisitions. We may also become more vulnerable to claims as we expand the range and scope of our services and are subject to laws in jurisdictions where the underlying laws with respect to potential liability are either unclear or less favorable. In addition, we have entered into indemnification agreements with our officers, directors and underwriters, and our bylaws contain similar indemnification obligations that cover officers, directors, employees and other agents. 

Except as noted above, it is not possible to determine the maximum potential amount under these indemnification agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. Historically, any payments that we have made under these agreements have not had a material impact on the operating results, financial position or cash flows.

Legal Matters and Contingencies [Text Block]

Legal Matters and Other Contingencies

From time to time, we are party to various legal proceedings incident to the operation of our business. For example, we currently are involved in proceedings brought by former employees and merchants, intellectual property infringement suits, customer lawsuits, consumer class actions and suits alleging, among other things, violations of state consumer protection or privacy laws.

In addition, third parties have from time to time claimed, and others may claim in the future, that we have infringed their intellectual property rights. We are subject to intellectual property disputes, including patent infringement claims, and expect that we will continue to be subject to intellectual property infringement claims as our services expand in scope and complexity. In the past, we have litigated such claims, and we are presently involved in several patent infringement and other intellectual property-related claims, including pending litigation or trademark disputes relating to, for example, our Goods category, some of which could involve potentially substantial claims for damages or injunctive relief. We may also become more vulnerable to third-party claims as laws such as the Digital Millennium Copyright Act are interpreted by the courts, and we become subject to laws in jurisdictions where the underlying laws with respect to the potential liability of online intermediaries are either unclear or less favorable. We believe that additional lawsuits alleging that we have violated patent, copyright or trademark laws will be filed against us. Intellectual property claims, whether meritorious or not, are time consuming and often costly to resolve, could require expensive changes in our methods of doing business or the goods we sell, or could require us to enter into costly royalty or licensing agreements.

We also are subject to consumer claims or lawsuits relating to alleged violations of consumer protection or privacy rights and statutes, some of which could involve potentially substantial claims for damages, including statutory or punitive damages. Consumer and privacy related claims or lawsuits, whether meritorious or not, could be time consuming, result in costly litigation, damage awards, fines and penalties, injunctive relief or increased costs of doing business through adverse judgment or settlement, or require us to change our business practices, sometimes in expensive ways.

We are also subject to, or in the future may become subject to, a variety of regulatory inquiries, audits, and investigations across the jurisdictions where we conduct our business, including, for example, inquiries related to consumer protection, employment matters and/or hiring practices, marketing practices, tax, unclaimed property and privacy rules and regulations. Any regulatory actions against us, whether meritorious or not, could be time consuming, result in costly litigation, damage awards, fines and penalties, injunctive relief or increased costs of doing business through adverse judgment or settlement, require us to change our business practices in expensive ways, require significant amounts of management time, result in the diversion of significant operational resources or otherwise harm our business.

We establish an accrued liability for loss contingencies related to legal and regulatory matters when the loss is both probable and reasonably estimable. Those accruals represent management's best estimate of probable losses and, in such cases, there may be an exposure to loss in excess of the amounts accrued. For certain of the matters described above, there are inherent and significant uncertainties based on, among other factors, the stage of the proceedings, developments in the applicable facts of law, or the lack of a specific damage claim. However, we believe that the amount of reasonably possible losses in excess of the amounts accrued for those matters would not have a material adverse effect on our business, condensed consolidated financial position, results of operations or cash flows. Our accrued liabilities for loss contingencies related to legal and regulatory matters may change in the future as a result of new developments, including, but not limited to, the occurrence of new legal matters, changes in the law or regulatory environment, adverse or favorable rulings, newly discovered facts relevant to the matter, or changes in the strategy for the matter. Regardless of the outcome, litigation and other regulatory matters can have an adverse impact on us because of defense and settlement costs, diversion of management resources and other factors.

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STOCKHOLDERS' EQUITY AND COMPENSATION ARRANGEMENTS

6 Months Ended

Jun. 30, 2019

Share-based Payment Arrangement [Abstract]

STOCKHOLDERS' EQUITY AND COMPENSATION ARRANGEMENTS

STOCKHOLDERS' EQUITY AND COMPENSATION ARRANGEMENTS

Common Stock

Pursuant to our restated certificate of incorporation, the Board has the authority to issue up to a total of 2,010,000,000 shares of common stock. Each holder of common stock is entitled to one vote per share on any matter that is submitted to a vote of stockholders. In addition, holders of our common stock will vote as a single class of stock on any matter that is submitted to a vote of stockholders.

Share Repurchase Program

In May 2018, the Board authorized us to repurchase up to $300.0 million of our common stock under our share repurchase program. During the three and six months ended June 30, 2019, we repurchased 4,228,148 and 8,636,143 shares for an aggregate purchase price of $15.1 million and $30.1 million (including fees and commissions) under our

repurchase program. As of June 30, 2019, up to $260.0 million of common stock remained available for purchase under our program. The timing and amount of share repurchases, if any, will be determined based on market conditions, limitations under the 2019 Credit Agreement, share price and other factors, and the share repurchase program may be terminated at any time.

Groupon, Inc. Stock Plans

In January 2008, we adopted the 2008 Stock Option Plan, as amended (the "2008 Plan"), under which options for up to 64,618,500 shares of common stock were authorized to be issued to employees, consultants and directors. The 2008 Plan was frozen in December 2010. In April 2010, we established the Groupon, Inc. 2010 Stock Plan, as amended in April 2011 (the "2010 Plan"), under which options and restricted stock units ("RSUs") for up to 20,000,000 shares of common stock were authorized for future issuance to employees, consultants and directors. No new awards may be granted under the 2010 Plan following our initial public offering in November 2011. In August 2011, we established the Groupon, Inc. 2011 Incentive Plan (the "2011 Plan"), as amended in November 2013, May 2014, June 2016 and June 2019, under which options, RSUs and performance stock units for up to 187,500,000 shares of common stock were authorized for future issuance to employees, consultants and directors.

The Groupon, Inc. Stock Plans (the "Plans") are administered by the Compensation Committee of the Board (the "Compensation Committee"). As of June 30, 2019, 64,223,134 shares of common stock were available for future issuance under the Plans.

The stock-based compensation expense related to stock awards issued under the Plans and acquisition-related awards are presented within the following line items of the condensed consolidated statements of operations for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Cost of revenue	$	380	$	288	$	758	$	684
Marketing	1,490		1,763		2,915		3,557
Selling, general and administrative	24,693		14,215		39,301		31,303
Other income (expense), net	—		52		—		100
Total stock-based compensation expense	$	26,563	$	16,318	$	42,974	$	35,644

We capitalized $2.2 million and $2.0 million of stock-based compensation for the three months ended June 30, 2019 and 2018, and $3.5 million and $3.7 million for the six months ended June 30, 2019 and 2018 in connection with internally-developed software and cloud computing arrangements.

Employee Stock Purchase Plan

The Groupon, Inc. 2012 Employee Stock Purchase Plan ("ESPP"), as amended in June 2019, authorizes us to grant up to 20,000,000 shares of common stock under that plan. For the six months ended June 30, 2019 and 2018, 719,297 and 746,773 shares of common stock were issued under the ESPP.

Restricted Stock Units

The restricted stock units granted under the Plans generally have vesting periods between one and four years and are amortized on a straight-line basis over their requisite service period. Additionally, we are required to issue restricted stock units to settle amounts that exceed targeted bonus amounts under our primary bonus plans. We account for those obligations, if any, as liability-classified awards with performance conditions.

The table below summarizes restricted stock unit activity under the Plans for the six months ended June 30, 2019:

	Restricted Stock Units		Weighted-Average Grant Date Fair Value (per unit)
Unvested at December 31, 2018	26,623,432		$	4.47
Granted	22,723,241		3.25
Vested	(7,787,055	)	4.45
Forfeited	(6,264,854	)	4.27
Unvested at June 30, 2019	35,294,764		3.92

As of June 30, 2019, $118.4 million of unrecognized compensation costs related to unvested restricted stock units are expected to be recognized over a remaining weighted-average period of 1.65 years.

Performance Share Units

We grant performance share units under the Plans that vest in shares of our common stock upon the achievement of financial and operational targets specified in the respective award agreement ("Performance Share Units"). During the six months ended June 30, 2019, we also granted performance share units that will vest if our average daily closing stock price is equal to or greater than $6.00 per share over a period of 30 consecutive trading days prior to December 31, 2022 or if a change in control occurs during the performance period at the specified stock price (and on a proportional basis for a change in control price between the grant date price and the specified stock price) ("Market-based Performance Share Units"). We determined these awards are subject to a market condition, and therefore we used a Monte Carlo simulation to calculate the grant date fair value of the awards and the related derived service period over which we will recognize the expense. The key inputs used in the Monte Carlo simulation were the risk-free rate, our volatility of 49.8% and our cost of equity of 12.8%.

All of our performance share awards are subject to both continued employment through the performance period dictated by the award and certification by the Compensation Committee that the specified performance conditions have been achieved.

The table below summarizes Performance Share Unit activity under the Plans for the six months ended June 30, 2019:

	Performance Share Units		Weighted-Average Grant Date Fair Value (per unit)		Market-based Performance Share Units	Weighted-Average Grant Date Fair Value (per unit)
Unvested at December 31, 2018	3,431,918		$	4.90	—	$	—
Granted	4,622,995		3.44		8,486,708	3.03
Vested	(777,573	)	4.88		—	—
Forfeited	(2,613,788	)	4.71		—	—
Unvested at June 30, 2019	4,663,552		3.56		8,486,708	3.03
Maximum shares issuable upon vesting at June 30, 2019	8,903,280				8,486,708

As of June 30, 2019, $15.8 million of unrecognized compensation costs related to unvested performance share units are expected to be recognized over a remaining weighted-average period of 1.94 years and $16.7 million of unrecognized compensation costs related to unvested market-based performance share units are expected to be recognized over a remaining weighted-average period of 0.66 years.

Stock Options

The exercise price of stock options granted is equal to the fair value of the underlying stock on the date of grant. The contractual term for stock options expires ten years from the grant date. Stock options generally vest over a three- or four-year period, with 25% of the awards vesting after one year and the remainder of the awards vesting on a monthly or quarterly basis thereafter. We did not grant any stock options during the six months ended June 30, 2019.

The table below summarizes stock option activity for the six months ended June 30, 2019:

	Options		Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands) (1)
Outstanding and exercisable at December 31, 2018	212,787		$	1.80	1.37	$	298
Exercised	(42,500	)	0.96
Outstanding and exercisable at June 30, 2019	170,287		$	1.95	0.92	$	278

(1)

The aggregate intrinsic value of options outstanding and exercisable represents the total pretax intrinsic value (the difference between the fair value of our stock on the last day of each period and the exercise price, multiplied by the number of options where the fair value exceeds the exercise price) that would have been received by the option holders had all option holders exercised their options as of June 30, 2019 and December 31, 2018.

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REVENUE RECOGNITION

6 Months Ended

Jun. 30, 2019

Revenue from Contract with Customer [Abstract]

REVENUE RECOGNITION

REVENUE RECOGNITION

Refer to Note 13, Segment Information, for revenue summarized by reportable segment and category for the three and six months ended June 30, 2019 and 2018.

Contract Balances

A substantial majority of our deferred revenue relates to product sales for which revenue will be recognized as the products are delivered to customers, generally within one week following the balance sheet date. Our deferred revenue was $19.9 million and $25.5 million as of June 30, 2019 and December 31, 2018. The amount of revenue recognized for the six months ended June 30, 2019 that was included in the deferred revenue balance at the beginning of the period was $25.4 million.

The following table summarizes the activity in the liability for customer credits for the six months ended June 30, 2019 (in thousands):

	Customer Credits
Balance as of December 31, 2018	$	15,118
Credits issued	56,477
Credits redeemed (1)	(49,928		)
Breakage revenue recognized	(4,177		)
Foreign currency translation	26
Balance as of June 30, 2019	$	17,516

(1) Customer credits can be redeemed through our online marketplaces for goods or services provided by a third-party merchant or for merchandise inventory sold by us. When customer credits are redeemed for goods or services provided by a third-party merchant, service revenue is recognized on a net basis as the difference between the carrying amount of the customer credit liability derecognized and the amount due to the merchant for the related transaction. When customer credits are redeemed for merchandise inventory sold by us, product revenue is recognized on a gross basis equal to the amount of the customer credit liability derecognized. Customer credits are typically used within one year of issuance.

Costs of Obtaining Contracts

Incremental costs to obtain contracts with third-party merchants, such as sales commissions, are deferred and recognized over the expected period of the merchant arrangement, generally from 12 to 18 months. Those costs are

classified within Selling, general and administrative expense in the condensed consolidated statements of operations. As of June 30, 2019 and December 31, 2018, we had deferred contract acquisition costs of $2.6 million and $2.9 million, respectively, recorded within Prepaid expenses and other current assets, and $10.2 million and $11.3 million, respectively, recorded within Other non-current assets. We amortized $5.1 million and $6.5 million of deferred contract acquisition costs during the three months ended June 30, 2019 and 2018, and $10.5 million and $13.3 million for the six months ended June 30, 2019 and 2018. We did not recognize any impairment losses in relation to the deferred costs.

Variable Consideration for Unredeemed Vouchers

In our International segment and, to a lesser extent, in our North America segment, our merchant agreements have redemption payment terms, under which the merchant is not paid its share of the sale price for a voucher sold through one of our online marketplaces until the customer redeems the related voucher. If the customer does not redeem a voucher with such merchant payment terms, we retain all of the gross billings for that voucher, rather than retaining only our net commission. We estimate the variable consideration from vouchers that will not ultimately be redeemed using our historical voucher redemption experience and recognize that amount as revenue at the time of sale. We only recognize amounts in variable consideration when we believe it is probable that a significant reversal of revenue will not occur in future periods, which requires us to make significant estimates of future redemptions. If actual redemptions differ from our estimates, the effects could be material to the condensed consolidated financial statements. As of June 30, 2019 and December 31, 2018, we constrained $15.3 million and $13.7 million in revenue from unredeemed vouchers that we may recognize in future periods when we determine it is probable that a significant amount of that revenue will not be subsequently reversed.

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INCOME TAXES

6 Months Ended

Jun. 30, 2019

Income Tax Disclosure [Abstract]

INCOME TAXES

INCOME TAXES

Our income tax provision for interim periods is determined using an estimate of our annual effective tax rate, adjusted for discrete items.

For the three months ended June 30, 2019, we recorded an income tax expense from continuing operations of $2.0 million on a pretax loss from continuing operations of $35.6 million. For the three months ended June 30, 2018, we recorded an income tax expense from continuing operations of $1.6 million on a pretax loss from continuing operations of $90.7 million. For the six months ended June 30, 2019, we recorded an income tax benefit from continuing operations of $1.5 million on a pretax loss from continuing operations of $80.3 million. For the six months ended June 30, 2018, we recorded an income tax benefit from continuing operations of $0.8 million on a pretax loss from continuing operations of $95.8 million.

Our U.S. Federal income tax rate is 21%. The primary factor impacting the effective tax rate for the three and six months ended June 30, 2019 and 2018 was the pretax losses incurred in jurisdictions that have valuation allowances against their net deferred tax assets. We expect that our consolidated effective tax rate in future periods will continue to differ significantly from the U.S. federal income tax rate as a result of our tax obligations in jurisdictions with profits and valuation allowances in jurisdictions with losses. The effective tax rate for the six months ended June 30, 2019 also reflected the reversal of reserves for uncertain tax positions due to the closure of a tax audit. The effective tax rate for the six months ended June 30, 2018 also reflected a $6.4 million income tax benefit resulting from the impact of Accounting Standards Codification Topic 606, Revenue from Contracts with Customers ("Topic 606") on intercompany activity in certain foreign jurisdictions.

We are currently undergoing income tax audits in multiple jurisdictions. It is likely that the examination phase of some of those audits will conclude in the next 12 months. There are many factors, including factors outside of our control, which influence the progress and completion of those audits. We are subject to claims for tax assessments by foreign jurisdictions, including a proposed assessment for $109.9 million. We believe that the assessment, which primarily relates to transfer pricing on transactions occurring in 2011, is without merit and we intend to vigorously defend ourselves in that matter. In addition to any potential increases in our liabilities for uncertain tax positions from the ultimate resolution of that assessment, we believe that it is reasonably possible that reductions of up to $21.0 million in unrecognized tax benefits may occur within the 12 months following June 30, 2019 upon closing of income tax audits or the expiration of applicable statutes of limitations.

In general, it is our practice and intention to reinvest the earnings of our non-U.S. subsidiaries in those operations. Additionally, while we did not incur the deemed repatriation tax, an actual repatriation from our non-U.S. subsidiaries could be subject to foreign and U.S. state income taxes. Aside from limited exceptions for which the related deferred tax liabilities recognized as of June 30, 2019 and December 31, 2018 are immaterial, we do not intend to distribute earnings of foreign subsidiaries for which we have an excess of the financial reporting basis over the tax basis of our investments and therefore have not recorded any deferred taxes related to such amounts. The actual tax cost resulting from a distribution would depend on income tax laws and circumstances at the time of distribution. Determination of the amount of unrecognized deferred tax liability related to the excess of the financial reporting basis over the tax basis of our foreign subsidiaries is not practical due to the complexities associated with the calculation.

Groupon uses a cost-sharing arrangement under which controlled members agree to share the costs and risks of developing intangible properties in accordance with their reasonably anticipated share of benefits from the intangibles. On July 24, 2018, the Ninth Circuit Court of Appeals issued an opinion in Altera Corp. v. Commissioner requiring related parties in an intercompany cost-sharing arrangement to share expenses related to stock-based compensation. This opinion reversed an earlier decision of the United States Tax Court. On August 7, 2018, the Ninth Circuit Court of Appeals withdrew its July 24, 2018 opinion. On June 7, 2019, the United States Court of Appeals for the Ninth Circuit reversed the Tax Court decision and ruled that stock-based compensation must be included in the shared pool of expenses. We do not expect that the ruling will have a material net impact on our provision for income taxes for the year ending December 31, 2019 due to the valuation allowances against our net deferred tax assets in the related jurisdictions.

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FAIR VALUE MEASUREMENTS

6 Months Ended

Jun. 30, 2019

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS

Fair value is defined under U.S. GAAP as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or a liability.

To increase the comparability of fair value measures, the following hierarchy prioritizes the inputs in valuation methodologies used to measure fair value:

Level 1 - Measurements that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets.

Level 2 - Measurements that include other inputs that are directly or indirectly observable in the marketplace.

Level 3 - Measurements derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable. These fair value measurements require significant judgment.

In determining fair value, we use various valuation approaches within the fair value measurement framework. The valuation methodologies used for our assets and liabilities measured at fair value and their classification in the valuation hierarchy are summarized below:

Fair value option investments and available-for-sale securities. To determine the fair value of our fair value option investments each period, we first estimate the fair value of each entity in its entirety. We primarily use the discounted cash flow method, which is an income approach, to estimate the fair value of the entities. The key inputs to determining fair values under that approach are cash flow forecasts and discount rates. We also use a market approach valuation technique, which is based on market multiples of guideline companies, to determine the fair value of each entity. The discounted cash flow and market multiple valuations are then evaluated and weighted to determine the amount that is most representative of the fair value of each entity. Once we determine the fair value of each entity, we then determine the fair value of our specific investments in those entities. The entities have complex capital structures, so we apply an option-pricing model that considers the liquidation preferences of each entity's respective classes of ownership interests to determine the fair value of our investment in each entity.

We also have investments in redeemable preferred shares and had investments in convertible debt securities issued by nonpublic entities. We measure the fair value of those available-for-sale securities using the

discounted cash flow method.

We have classified our fair value option investments and our investments in available-for-sale securities as Level 3 due to the lack of observable market data over fair value inputs such as cash flow projections and discount rates. Increases in projected cash flows and decreases in discount rates contribute to increases in the estimated fair values of the fair value option investments and available-for-sale securities, whereas decreases in projected cash flows and increases in discount rates contribute to decreases in their fair values.

Contingent consideration. We are subject to a contingent consideration arrangement to transfer a maximum payout in cash of $2.5 million to the former owners of a business acquired on April 30, 2018.

Liabilities for contingent consideration are measured at fair value each reporting period, with the acquisition-date fair value included as part of the consideration transferred in the related business combination and subsequent changes in fair value recorded in earnings within Selling, general and administrative expense on the condensed consolidated statements of operations.

We use an income approach to value contingent consideration obligations based on the present value of probability-weighted future cash flows. We classify the contingent consideration liabilities as Level 3 due to the lack of relevant observable market data over fair value inputs such as probability-weighting of payment outcomes.

The following tables summarize assets that are measured at fair value on a recurring basis as of June 30, 2019 and December 31, 2018 (in thousands):

			Fair Value Measurement at Reporting Date Using
	June 30, 2019		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Fair value option investments	$	4,917	$	—	$	—	$	4,917
Available-for-sale securities - redeemable preferred shares	10,201		—		—		10,201
Liabilities:
Contingent consideration	1,239		—		—		1,239

			Fair Value Measurement at Reporting Date Using
	December 31, 2018		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Fair value option investments	$	73,902	$	—	$	—	$	73,902
Available-for-sale securities - redeemable preferred shares	10,340		—		—		10,340
Liabilities:
Contingent consideration	1,529		—		—		1,529

The following table provides a rollforward of the fair value of recurring Level 3 fair value measurements for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Assets
Fair value option investments:
Beginning Balance	$	32,494		$	77,933		$	73,902		$	82,966
Total gains (losses) included in earnings	(27,577		)	(3,035		)	(68,985		)	(8,068		)
Ending Balance	$	4,917		$	74,898		$	4,917		$	74,898
Unrealized gains (losses) still held (1)	$	(27,577	)	$	(3,035	)	$	(68,985	)	$	(8,068	)
Available-for-sale securities
Convertible debt securities:
Beginning Balance	$	—		$	11,070		$	—		$	11,354
Transfer to other equity investment upon conversion of convertible debt security	—			(2,508		)	—			(2,508		)
Total gains (losses) included in other comprehensive income (loss)	—			(541		)	—			(1,042		)
Total gains (losses) included in earnings (2)	—			2,215			—			2,432
Ending Balance	$	—		$	10,236		$	—		$	10,236
Unrealized gains (losses) still held (1)	$	—		$	2,599		$	—		$	2,405
Redeemable preferred shares:
Beginning Balance	$	10,394		$	14,576		$	10,340		$	15,431
Total gains (losses) included in other comprehensive income (loss)	(193		)	—			(139		)	—
Impairments included in earnings	—			(4,615		)	—			(5,470		)
Ending Balance	$	10,201		$	9,961		$	10,201		$	9,961
Unrealized gains (losses) still held (1)	$	(193	)	$	(4,615	)	$	(139	)	$	(5,470	)
Liabilities
Contingent Consideration:
Beginning Balance	$	1,586		$	—		$	1,529		$	—
Issuance of contingent consideration in connection with acquisition	—			1,589			—			1,589
Settlements of contingent consideration liabilities	(312		)	—			(312		)	—
Total losses (gains) included in earnings	5			14			27			14
Foreign currency translation	(40		)	(61		)	(5		)	(61		)
Ending Balance	$	1,239		$	1,542		$	1,239		$	1,542
Unrealized gains (losses) still held (1)	$	5		$	(47	)	$	27		$	(47	)

(1) Represents the unrealized gains or losses recorded in earnings and/or other comprehensive income (loss) during the period for assets and liabilities classified as Level 3 that are still held (or outstanding) at the end of the period.

(2) Represents a gain at maturity of a previously impaired convertible debt security, accretion of interest income and changes in the fair value of an embedded derivative.

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Certain assets and liabilities are measured at fair value on a nonrecurring basis, including assets that are written down to fair value as a result of an impairment. We did not record any significant nonrecurring fair value measurements after initial recognition for the three and six months ended June 30, 2019. During the three months ended June 30, 2018, we recorded a $4.6 million impairment of an other equity investment. To determine the fair value of the investment, we considered the financial condition of the investee and applied a market approach. We classified the fair value measurement of that other equity investment as Level 3 because it involves significant unobservable inputs. We did not record any other nonrecurring fair value measurements after initial recognition for the three and six

months ended June 30, 2018.

Estimated Fair Value of Financial Assets and Liabilities Not Measured at Fair Value

Our financial instruments not carried at fair value consist primarily of accounts receivable, restricted cash, accounts payable, accrued merchant and supplier payables and accrued expenses. The carrying values of those assets and liabilities approximate their respective fair values as of June 30, 2019 and December 31, 2018 due to their short-term nature.

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INCOME (LOSS) PER SHARE

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

INCOME (LOSS) PER SHARE

INCOME (LOSS) PER SHARE

Basic net income (loss) per share is computed using the weighted-average number of common shares outstanding during the period. Diluted net income (loss) per share is computed using the weighted-average number of common shares and the effect of potentially dilutive securities outstanding during the period. Potentially dilutive securities include stock options, restricted stock units, performance share units, ESPP shares, warrants and convertible senior notes. If dilutive, those potentially dilutive securities are reflected in diluted net income (loss) per share by application of the treasury stock method, except for the convertible senior notes, which are subject to the if-converted method.

The following table sets forth the computation of basic and diluted net income (loss) per share of common stock for the three and six months ended June 30, 2019 and 2018 (in thousands, except share and per share amounts):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Basic and diluted net income (loss) per share:
Numerator
Net income (loss) - continuing operations	$	(37,645	)	$	(92,254	)	$	(78,815	)	$	(95,049	)
Less: Net income (loss) attributable to noncontrolling interests	2,601			2,780			6,080			6,873
Net income (loss) attributable to common stockholders - continuing operations	(40,246		)	(95,034		)	(84,895		)	(101,922		)
Net income (loss) attributable to common stockholders - discontinued operations	—			—			2,162			—
Net income (loss) attributable to common stockholders	$	(40,246	)	$	(95,034	)	$	(82,733	)	$	(101,922	)
Denominator
Weighted-average common shares outstanding	567,962,461			565,284,705			569,014,065			563,502,954
Basic and diluted net income (loss) per share:
Continuing operations	$	(0.07	)	$	(0.17	)	$	(0.15	)	$	(0.18	)
Discontinued operations	0.00			0.00			0.01			0.00
Basic and diluted net income (loss) per share	$	(0.07	)	$	(0.17	)	$	(0.14	)	$	(0.18	)

The following weighted-average potentially dilutive instruments are not included in the diluted net income (loss) per share calculations above because they would have had an antidilutive effect on the net income (loss) per share from continuing operations:

	Three Months Ended June 30,		Six Months Ended June 30,
	2019	2018	2019	2018
Restricted stock units	37,031,941	32,602,563	32,060,396	30,378,335
Other stock-based compensation awards	1,581,255	1,615,249	1,667,000	2,413,637
Convertible senior notes	46,296,300	46,296,300	46,296,300	46,296,300
Warrants	46,296,300	46,296,300	46,296,300	46,296,300
Total	131,205,796	126,810,412	126,319,996	125,384,572

We had outstanding performance share units as of June 30, 2019 and 2018 that were eligible to vest into shares of common stock subject to the achievement of specified performance conditions. Contingently issuable shares are excluded from the computation of diluted earnings per share if, based on current period results, the shares would not be issuable if the end of the reporting period were the end of the contingency period. There were up to 16,966,170 and 7,706,474 shares of common stock issuable upon vesting of outstanding performance share units as of June 30, 2019 and 2018 that were excluded from the table above as the performance conditions were not satisfied as of the end of the respective periods.

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SEGMENT INFORMATION

6 Months Ended

Jun. 30, 2019

Segment Reporting [Abstract]

SEGMENT INFORMATION

SEGMENT INFORMATION

The segment information reported in the tables below reflects the operating results that are regularly reviewed by our chief operating decision maker to assess performance and make resource allocation decisions. Our operations are organized into two segments: North America and International.

The following table summarizes revenue by reportable segment and category for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
North America
Service revenue:
Local	$	177,082	$	185,870	$	357,459	$	373,281
Goods	3,714		3,796		6,841		8,670
Travel	16,125		19,888		35,066		39,972
Product revenue - Goods	127,739		170,710		282,459		351,597
Total North America revenue (1)	324,660		380,264		681,825		773,520
International
Service revenue:
Local	69,995		71,425		143,185		146,003
Goods	2,610		4,967		4,065		8,381
Travel	8,077		9,706		16,814		21,142
Product revenue - Goods	127,235		151,034		265,098		294,890
Total International revenue (1)	$	207,917	$	237,132	$	429,162	$	470,416

(1) North America includes revenue from the United States of $319.2 million and $371.1 million for the three months ended June 30, 2019 and 2018 and $668.0 million and $756.5 million for the six months ended June 30, 2019 and 2018. International includes revenue from the United Kingdom of $71.3 million and $91.5 million for the three months ended June 30, 2019 and 2018 and $152.4 million and $174.5 million for the six months ended June 30, 2019 and 2018. There were no other individual countries that represented more than 10% of consolidated total revenue for the three and six months ended June 30, 2019 and 2018. Revenue is attributed to individual countries based on the location of the customer.

The following table summarizes gross profit by reportable segment and category for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
North America
Service gross profit:
Local	$	157,673	$	165,285	$	318,755	$	332,041
Goods	2,995		2,990		5,558		6,931
Travel	12,806		16,303		28,074		32,305
Product gross profit - Goods	25,110		34,793		55,999		67,774
Total North America gross profit	198,584		219,371		408,386		439,051
International
Service gross profit:
Local	65,780		67,360		134,758		137,575
Goods	2,384		4,565		3,652		7,652
Travel	7,370		8,919		15,411		19,570
Product gross profit - Goods	18,014		23,443		35,941		44,695
Total International gross profit	$	93,548	$	104,287	$	189,762	$	209,492

The following table summarizes operating income (loss) by reportable segment for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Operating income (loss) (1) (2) (3):
North America	$	(372	)	$	(68,524	)	$	4,964		$	(70,384	)
International	(6,767		)	4,279			(9,908		)	9,524
Total operating income (loss)	$	(7,139	)	$	(64,245	)	$	(4,944	)	$	(60,860	)

(1) Includes stock-based compensation of $24.1 million and $15.0 million for North America and $2.5 million and $1.3 million for International for the three months ended June 30, 2019 and 2018 and $38.9 million and $32.9 million for North America and $4.1 million and $2.7 million for International for the six months ended June 30, 2019 and 2018.

(2) Includes acquisition-related (benefit) expense, net of $0.7 million for International for the three and six months ended June 30, 2018.

(3) Includes a $75.0 million charge recognized in the second quarter of 2018 to increase the accrual for the IBM patent litigation matter for North America for the three and six months ended June 30, 2018.

The following table summarizes total assets by reportable segment as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Total assets:
North America (1)	$	895,928	$	958,412
International (1)	543,280		683,730
Consolidated total assets	$	1,439,208	$	1,642,142

(1)

North America contains assets from the United States of $870.6 million and $940.5 million as of June 30, 2019 and December 31, 2018. International contains assets from Ireland of $204.6 million as of December 31, 2018. Assets from Ireland were less than 10% of consolidated total assets as of June 30, 2019. There were no other individual countries that represented more than 10% of consolidated total assets as of June 30, 2019 and December 31, 2018.

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DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION Policies (Policies)

6 Months Ended

Jun. 30, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Principles of Consolidation

Principles of Consolidation

The condensed consolidated financial statements include the accounts of Groupon, Inc. and its subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The condensed consolidated financial statements were prepared in accordance with U.S. GAAP and include the assets, liabilities, revenue and expenses of all wholly-owned subsidiaries and majority-owned subsidiaries over which we exercise control and a variable interest entity for which we have determined that we are the primary beneficiary. In the first quarter of 2019, we extended our arrangement through July 2022 with the strategic partner in the variable interest entity that we consolidate. Outside stockholders' interests in subsidiaries are shown on the condensed consolidated financial statements as Noncontrolling interests. Investments in entities in which we do not have a controlling financial interest are accounted for under the equity method, the fair value option, as available-for-sale securities or at cost adjusted for observable price changes and impairments, as appropriate.

Adoption of New Accounting Standards

Adoption of New Accounting Standards

We adopted the guidance in ASU 2016-02, Leases (Topic 842) on January 1, 2019. This ASU requires the recognition of lease assets and liabilities for operating leases, in addition to the finance lease assets and liabilities historically recorded on our condensed consolidated balance sheets. See Note 6, Leases, for information on the impact of adopting Topic 842 on our accounting policies.

We adopted the guidance in ASU 2018-07, Compensation - Stock Compensation (Topic 718) - Improvements to Nonemployee Share-Based Payment Accounting, on January 1, 2019. This ASU expands the scope to make the guidance for share-based payment awards to nonemployees consistent with the guidance for share-based payment awards to employees. The adoption of ASU 2018-07 did not have a material impact on the condensed consolidated financial statements.

We adopted the guidance in ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40) - Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, on January 1, 2019. This ASU requires entities in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40, Internal Use Software, to determine which costs to implement the service contract would be capitalized as an asset related to the service contract and which costs would be expensed. The requirements of ASU 2018-15 have been applied on a prospective basis to implementation costs incurred on or after January 1, 2019. As a result of the adoption of ASU 2018-15, we capitalized $1.9 million and $2.8 million of implementation costs for the three and six months ended June 30, 2019. Those capitalized costs are included within Other non-current assets on the condensed consolidated balance sheet as of June 30, 2019. We have not recognized any amortization related to these implementation costs. We will amortize the implementation costs on a straight-line basis over the term of the associated hosting arrangement for each module or component of the related hosting arrangement when it is ready for its intended use. Amortization costs will be recorded in Selling, general and administrative expense on the condensed consolidated statements of operations.

Reclassifications and Terminology Changes

Reclassifications and Terminology Changes

Certain reclassifications have been made to the condensed consolidated financial statements of prior periods and the accompanying notes to conform to the current period presentation

Use of Estimates

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires estimates and assumptions that affect the reported amounts and classifications of assets and liabilities, revenue and expenses, and the related disclosures of contingent liabilities in the condensed consolidated financial statements and accompanying notes. Estimates are used for, but not limited to, variable consideration from unredeemed vouchers, income taxes, initial valuation and subsequent impairment testing of goodwill and intangible assets, investments, customer refunds, contingent liabilities and the useful lives of property, equipment and software and intangible assets. Actual results could differ materially from those estimates.

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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

6 Months Ended

Jun. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table summarizes goodwill activity by segment for the six months ended June 30, 2019 (in thousands):

	North America		International			Consolidated
Balance as of December 31, 2018	$	178,685	$	146,806		$	325,491
Foreign currency translation	—		(786		)	(786		)
Balance as of June 30, 2019	$	178,685	$	146,020		$	324,705

Schedule of Intangible Assets

The following table summarizes intangible assets as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019						December 31, 2018
Asset Category	Gross Carrying Value		Accumulated Amortization		Net Carrying Value		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Customer relationships	$	16,200	$	14,400	$	1,800	$	16,200	$	11,700	$	4,500
Merchant relationships	21,486		6,157		15,329		21,554		4,105		17,449
Trade names	9,467		7,074		2,393		9,476		6,799		2,677
Developed technology	13,813		13,601		212		13,825		13,485		340
Patents	21,744		17,254		4,490		20,508		16,451		4,057
Other intangible assets	26,091		11,319		14,772		26,007		9,629		16,378
Total	$	108,801	$	69,805	$	38,996	$	107,570	$	62,169	$	45,401

Schedule of Estimated Future Amortization Expense

As of June 30, 2019, estimated future amortization expense related to intangible assets is as follows (in thousands):

Remaining amounts in 2019	$	6,384
2020	7,780
2021	7,046
2022	6,730
2023	5,582
Thereafter	5,474
Total	$	38,996

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INVESTMENTS (Tables)

6 Months Ended

Jun. 30, 2019

Schedule of Equity Method Investments [Abstract]

Summary of Investments

The following table summarizes investments as of June 30, 2019 and December 31, 2018 (dollars in thousands):

	June 30, 2019		Percent Ownership of Voting Stock			December 31, 2018		Percent Ownership of Voting Stock
Available-for-sale securities - redeemable preferred shares	$	10,201	19%	to	25%	$	10,340	19%	to	25%
Fair value option investments	4,917		10%	to	19%	73,902		10%	to	19%
Other equity investments	24,183		1%	to	19%	24,273		1%	to	19%
Total investments	$	39,301				$	108,515

Schedule of Activity for Available For Sale Securities

The following table summarizes amortized cost, gross unrealized gain, gross unrealized loss and fair value of redeemable preferred shares as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Amortized cost	$	9,961	$	9,961
Gross unrealized gain (loss)	240		379
Fair value	$	10,201	$	10,340

Schedule of Gains and Losses due to Changes in Fair Value of Investments

The following table summarizes gains and losses due to changes in fair value of those investments for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Monster LP	$	(27,949	)	$	(3,054	)	$	(69,408	)	$	(8,285	)
Nearbuy	372			19			423			217
Total	$	(27,577	)	$	(3,035	)	$	(68,985	)	$	(8,068	)

Schedule of Equity Method Investments

The following table summarizes the condensed financial information for Monster LP for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Revenue	$	131,816		$	84,525		$	252,016		$	171,384
Gross profit	9,542			6,574			17,407			13,811
Loss before income taxes	(31,253		)	(35,447		)	(60,324		)	(68,867		)
Net loss	(31,253		)	(35,447		)	(60,324		)	(68,867		)

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SUPPLEMENTAL CONSOLIDATED BALANCE SHEETS AND STATEMENTS OF OPERATIONS INFORMATION (Tables)

6 Months Ended

Jun. 30, 2019

Supplemental Consolidated Balance Sheet & Statement of Operations Information [Abstract]

Schedule of Other Income (Expense)

The following table summarizes other income (expense), net for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Interest income	$	1,915		$	1,836		$	3,851		$	3,345
Interest expense	(5,442		)	(5,228		)	(11,133		)	(10,721		)
Changes in fair value of investments	(27,577		)	(3,035		)	(68,985		)	(8,068		)
Foreign currency gains (losses), net	2,609			(12,533		)	930			(11,135		)
Impairments of investments	—			(9,189		)	—			(10,044		)
Other	1			1,692			(12		)	1,651
Other income (expense), net	$	(28,494	)	$	(26,457	)	$	(75,349	)	$	(34,972	)

Schedule of Prepaid and Other Current Assets

The following table summarizes prepaid expenses and other current assets as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Merchandise inventories	$	29,235	$	33,739
Prepaid expenses	32,414		28,209
Income taxes receivable	6,693		6,717
Other	22,714		19,450
Total prepaid expenses and other current assets	$	91,056	$	88,115

Schedule of Accrued Merchant and Supplier Payables

The following table summarizes accrued merchant and supplier payables as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Accrued merchant payables	$	333,441	$	371,279
Accrued supplier payables (1)	130,684		280,502
Total accrued merchant and supplier payables	$	464,125	$	651,781

(1)

Amounts include payables to suppliers of inventories and providers of shipping and fulfillment services.

Schedule of Accrued Expenses and Other Current Liabilities

The following table summarizes accrued expenses and other current liabilities as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Refunds reserve	$	19,812	$	27,957
Compensation and benefits	56,600		56,173
Accrued marketing	29,227		39,094
Customer credits	17,516		15,118
Income taxes payable	5,320		8,987
Deferred revenue	19,949		25,452
Current portion of lease obligations (1)	43,033		17,207
Other	67,153		77,046
Total accrued expenses and other current liabilities	$	258,610	$	267,034

Schedule of Other Non-current Liabilities

The following table summarizes other non-current liabilities as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Contingent income tax liabilities	$	32,756	$	39,858
Deferred rent (1)	—		32,186
Deferred income taxes	4,164		6,619
Other	16,820		22,025
Total other non-current liabilities	$	53,740	$	100,688

(1)

Non-current operating lease liabilities as of June 30, 2019 are included within Operating lease obligations on the condensed consolidated balance sheet as a result of the adoption of Topic 842 on January 1, 2019. Refer to Note 6, Leases, for additional information.

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FINANCING ARRANGEMENTS (Tables)

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Schedule of Notes

The carrying amount of the Notes consisted of the following as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019			December 31, 2018
Liability component:
Principal amount	$	250,000		$	250,000
Less: debt discount	(41,900		)	(48,331		)
Net carrying amount of liability component	$	208,100		$	201,669
Net carrying amount of equity component	$	67,014		$	67,014

Schedule of Convertible Debt Interest Expense

During the three and six months ended June 30, 2019 and 2018, we recognized interest costs on the Notes as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Contractual interest (3.25% of the principal amount per annum)	$	2,032	$	2,032	$	4,064	$	4,064
Amortization of debt discount	3,256		2,940		6,431		5,806
Total	$	5,288	$	4,972	$	10,495	$	9,870

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LEASES (Tables)

6 Months Ended

Jun. 30, 2019

Leases [Abstract]

Schedule of Lease Cost

The following table summarizes our lease cost and sublease income for the three and six months ended June 30, 2019 (in thousands):

	Three Months Ended June 30, 2019			Six Months Ended June 30, 2019
Financing lease cost:
Amortization of right-of-use assets	$	5,999		$	12,755
Interest on lease liabilities	266			573
Total finance lease cost	6,265			13,328
Operating lease cost	8,737			17,211
Variable lease cost	1,825			3,909
Short-term lease cost	169			210
Sublease income, gross	(1,312		)	(2,624		)
Total lease cost	$	15,684		$	32,034

The following summarizes right-of-use assets as of June 30, 2019 (in thousands):

	June 30, 2019
Right-of-use assets - operating leases	$	127,305
Right-of-use assets - finance leases (1)	35,201
Total right-of-use assets, gross	162,506
Less: accumulated depreciation and amortization	(25,572		)
Right-of-use assets, net	$	136,934

Schedule of Finance Lease Liabilities

As of June 30, 2019, the future payments under finance leases and operating leases for each of the next five years and thereafter are as follows (in thousands):    

	Finance Leases			Operating Leases
Remaining in 2019	$	6,972		$	19,787
2020	8,971			35,994
2021	5,052			32,720
2022	715			31,962
2023	12			24,516
Thereafter	—			33,175
Total minimum lease payments	21,722			178,154
Less: Amount representing interest	(1,080		)	(24,761		)
Present value of net minimum lease payments	20,642			153,393
Less: Current portion of lease obligations	(11,166		)	(31,867		)
Total long-term lease obligations	$	9,476		$	121,526

Schedule of Operating Lease Liabilities

As of June 30, 2019, the future payments under finance leases and operating leases for each of the next five years and thereafter are as follows (in thousands):    

	Finance Leases			Operating Leases
Remaining in 2019	$	6,972		$	19,787
2020	8,971			35,994
2021	5,052			32,720
2022	715			31,962
2023	12			24,516
Thereafter	—			33,175
Total minimum lease payments	21,722			178,154
Less: Amount representing interest	(1,080		)	(24,761		)
Present value of net minimum lease payments	20,642			153,393
Less: Current portion of lease obligations	(11,166		)	(31,867		)
Total long-term lease obligations	$	9,476		$	121,526

Schedule of Lease Income

As of June 30, 2019, the future amounts due under subleases for each of the next five years and thereafter are as follows (in thousands):

	Subleases
Remaining in 2019	$	2,603
2020	5,027
2021	5,065
2022	5,103
2023	4,385
Thereafter	4,891
Total future sublease income	$	27,074

Schedule of Supplemental Cash Flow Information

The following table summarizes supplemental cash flow information on our leasing obligations for the six months ended June 30, 2019 (in thousands):

	Six Months Ended June 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$	573
Operating cash flows from operating leases	(13,145		)
Financing cash flows from finance leases	(12,628		)
Right-of-use assets obtained in exchange for lease liabilities:
Finance leases	2,872
Operating leases	17,853

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STOCKHOLDERS' EQUITY AND COMPENSATION ARRANGEMENTS Tables (Tables)

6 Months Ended

Jun. 30, 2019

Share-based Payment Arrangement [Abstract]

Share-based Payment Arrangement, Activity [Table Text Block]

The stock-based compensation expense related to stock awards issued under the Plans and acquisition-related awards are presented within the following line items of the condensed consolidated statements of operations for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Cost of revenue	$	380	$	288	$	758	$	684
Marketing	1,490		1,763		2,915		3,557
Selling, general and administrative	24,693		14,215		39,301		31,303
Other income (expense), net	—		52		—		100
Total stock-based compensation expense	$	26,563	$	16,318	$	42,974	$	35,644

We capitalized $2.2 million and $2.0 million of stock-based compensation for the three months ended June 30, 2019 and 2018, and $3.5 million and $3.7 million for the six months ended June 30, 2019 and 2018 in connection with internally-developed software and cloud computing arrangements.

Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]

The table below summarizes restricted stock unit activity under the Plans for the six months ended June 30, 2019:

	Restricted Stock Units		Weighted-Average Grant Date Fair Value (per unit)
Unvested at December 31, 2018	26,623,432		$	4.47
Granted	22,723,241		3.25
Vested	(7,787,055	)	4.45
Forfeited	(6,264,854	)	4.27
Unvested at June 30, 2019	35,294,764		3.92

Share-based Compensation, Performance and Market-Based Performance Shares Units Activity [Table Text Block]

The table below summarizes Performance Share Unit activity under the Plans for the six months ended June 30, 2019:

	Performance Share Units		Weighted-Average Grant Date Fair Value (per unit)		Market-based Performance Share Units	Weighted-Average Grant Date Fair Value (per unit)
Unvested at December 31, 2018	3,431,918		$	4.90	—	$	—
Granted	4,622,995		3.44		8,486,708	3.03
Vested	(777,573	)	4.88		—	—
Forfeited	(2,613,788	)	4.71		—	—
Unvested at June 30, 2019	4,663,552		3.56		8,486,708	3.03
Maximum shares issuable upon vesting at June 30, 2019	8,903,280				8,486,708

Share-based Payment Arrangement, Option and Stock Appreciation Rights, Activity [Table Text Block]

The table below summarizes stock option activity for the six months ended June 30, 2019:

	Options		Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands) (1)
Outstanding and exercisable at December 31, 2018	212,787		$	1.80	1.37	$	298
Exercised	(42,500	)	0.96
Outstanding and exercisable at June 30, 2019	170,287		$	1.95	0.92	$	278

(1)

The aggregate intrinsic value of options outstanding and exercisable represents the total pretax intrinsic value (the difference between the fair value of our stock on the last day of each period and the exercise price, multiplied by the number of options where the fair value exceeds the exercise price) that would have been received by the option holders had all option holders exercised their options as of June 30, 2019 and December 31, 2018.

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REVENUE RECOGNITION (Tables)

6 Months Ended

Jun. 30, 2019

Revenue from Contract with Customer [Abstract]

Deferred Revenue, by Arrangement, Disclosure

The following table summarizes the activity in the liability for customer credits for the six months ended June 30, 2019 (in thousands):

	Customer Credits
Balance as of December 31, 2018	$	15,118
Credits issued	56,477
Credits redeemed (1)	(49,928		)
Breakage revenue recognized	(4,177		)
Foreign currency translation	26
Balance as of June 30, 2019	$	17,516

(1)

Customer credits can be redeemed through our online marketplaces for goods or services provided by a third-party merchant or for merchandise inventory sold by us. When customer credits are redeemed for goods or services provided by a third-party merchant, service revenue is recognized on a net basis as the difference between the carrying amount of the customer credit liability derecognized and the amount due to the merchant for the related transaction. When customer credits are redeemed for merchandise inventory sold by us, product revenue is recognized on a gross basis equal to the amount of the customer credit liability derecognized. Customer credits are typically used within one year of issuance.

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FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Jun. 30, 2019

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

The following tables summarize assets that are measured at fair value on a recurring basis as of June 30, 2019 and December 31, 2018 (in thousands):

			Fair Value Measurement at Reporting Date Using
	June 30, 2019		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Fair value option investments	$	4,917	$	—	$	—	$	4,917
Available-for-sale securities - redeemable preferred shares	10,201		—		—		10,201
Liabilities:
Contingent consideration	1,239		—		—		1,239

			Fair Value Measurement at Reporting Date Using
	December 31, 2018		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Fair value option investments	$	73,902	$	—	$	—	$	73,902
Available-for-sale securities - redeemable preferred shares	10,340		—		—		10,340
Liabilities:
Contingent consideration	1,529		—		—		1,529

Fair Value, Assets and Liabilities, Reconciliation of Level 3 Inputs

The following table provides a rollforward of the fair value of recurring Level 3 fair value measurements for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Assets
Fair value option investments:
Beginning Balance	$	32,494		$	77,933		$	73,902		$	82,966
Total gains (losses) included in earnings	(27,577		)	(3,035		)	(68,985		)	(8,068		)
Ending Balance	$	4,917		$	74,898		$	4,917		$	74,898
Unrealized gains (losses) still held (1)	$	(27,577	)	$	(3,035	)	$	(68,985	)	$	(8,068	)
Available-for-sale securities
Convertible debt securities:
Beginning Balance	$	—		$	11,070		$	—		$	11,354
Transfer to other equity investment upon conversion of convertible debt security	—			(2,508		)	—			(2,508		)
Total gains (losses) included in other comprehensive income (loss)	—			(541		)	—			(1,042		)
Total gains (losses) included in earnings (2)	—			2,215			—			2,432
Ending Balance	$	—		$	10,236		$	—		$	10,236
Unrealized gains (losses) still held (1)	$	—		$	2,599		$	—		$	2,405
Redeemable preferred shares:
Beginning Balance	$	10,394		$	14,576		$	10,340		$	15,431
Total gains (losses) included in other comprehensive income (loss)	(193		)	—			(139		)	—
Impairments included in earnings	—			(4,615		)	—			(5,470		)
Ending Balance	$	10,201		$	9,961		$	10,201		$	9,961
Unrealized gains (losses) still held (1)	$	(193	)	$	(4,615	)	$	(139	)	$	(5,470	)
Liabilities
Contingent Consideration:
Beginning Balance	$	1,586		$	—		$	1,529		$	—
Issuance of contingent consideration in connection with acquisition	—			1,589			—			1,589
Settlements of contingent consideration liabilities	(312		)	—			(312		)	—
Total losses (gains) included in earnings	5			14			27			14
Foreign currency translation	(40		)	(61		)	(5		)	(61		)
Ending Balance	$	1,239		$	1,542		$	1,239		$	1,542
Unrealized gains (losses) still held (1)	$	5		$	(47	)	$	27		$	(47	)

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INCOME (LOSS) PER SHARE (Tables)

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted Net Income (Loss) Per Share

The following table sets forth the computation of basic and diluted net income (loss) per share of common stock for the three and six months ended June 30, 2019 and 2018 (in thousands, except share and per share amounts):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Basic and diluted net income (loss) per share:
Numerator
Net income (loss) - continuing operations	$	(37,645	)	$	(92,254	)	$	(78,815	)	$	(95,049	)
Less: Net income (loss) attributable to noncontrolling interests	2,601			2,780			6,080			6,873
Net income (loss) attributable to common stockholders - continuing operations	(40,246		)	(95,034		)	(84,895		)	(101,922		)
Net income (loss) attributable to common stockholders - discontinued operations	—			—			2,162			—
Net income (loss) attributable to common stockholders	$	(40,246	)	$	(95,034	)	$	(82,733	)	$	(101,922	)
Denominator
Weighted-average common shares outstanding	567,962,461			565,284,705			569,014,065			563,502,954
Basic and diluted net income (loss) per share:
Continuing operations	$	(0.07	)	$	(0.17	)	$	(0.15	)	$	(0.18	)
Discontinued operations	0.00			0.00			0.01			0.00
Basic and diluted net income (loss) per share	$	(0.07	)	$	(0.17	)	$	(0.14	)	$	(0.18	)

Schedule of Weighted-Average Potentially Dilutive Instruments

The following weighted-average potentially dilutive instruments are not included in the diluted net income (loss) per share calculations above because they would have had an antidilutive effect on the net income (loss) per share from continuing operations:

	Three Months Ended June 30,		Six Months Ended June 30,
	2019	2018	2019	2018
Restricted stock units	37,031,941	32,602,563	32,060,396	30,378,335
Other stock-based compensation awards	1,581,255	1,615,249	1,667,000	2,413,637
Convertible senior notes	46,296,300	46,296,300	46,296,300	46,296,300
Warrants	46,296,300	46,296,300	46,296,300	46,296,300
Total	131,205,796	126,810,412	126,319,996	125,384,572

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SEGMENT INFORMATION (Tables)

6 Months Ended

Jun. 30, 2019

Segment Reporting [Abstract]

Schedule of Revenue by Reportable Segment

The following table summarizes revenue by reportable segment and category for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
North America
Service revenue:
Local	$	177,082	$	185,870	$	357,459	$	373,281
Goods	3,714		3,796		6,841		8,670
Travel	16,125		19,888		35,066		39,972
Product revenue - Goods	127,739		170,710		282,459		351,597
Total North America revenue (1)	324,660		380,264		681,825		773,520
International
Service revenue:
Local	69,995		71,425		143,185		146,003
Goods	2,610		4,967		4,065		8,381
Travel	8,077		9,706		16,814		21,142
Product revenue - Goods	127,235		151,034		265,098		294,890
Total International revenue (1)	$	207,917	$	237,132	$	429,162	$	470,416

(1)

North America includes revenue from the United States of $319.2 million and $371.1 million for the three months ended June 30, 2019 and 2018 and $668.0 million and $756.5 million for the six months ended June 30, 2019 and 2018. International includes revenue from the United Kingdom of $71.3 million and $91.5 million for the three months ended June 30, 2019 and 2018 and $152.4 million and $174.5 million for the six months ended June 30, 2019 and 2018. There were no other individual countries that represented more than 10% of consolidated total revenue for the three and six months ended June 30, 2019 and 2018.

Schedule of Gross Profit by Reportable Segment

The following table summarizes gross profit by reportable segment and category for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
North America
Service gross profit:
Local	$	157,673	$	165,285	$	318,755	$	332,041
Goods	2,995		2,990		5,558		6,931
Travel	12,806		16,303		28,074		32,305
Product gross profit - Goods	25,110		34,793		55,999		67,774
Total North America gross profit	198,584		219,371		408,386		439,051
International
Service gross profit:
Local	65,780		67,360		134,758		137,575
Goods	2,384		4,565		3,652		7,652
Travel	7,370		8,919		15,411		19,570
Product gross profit - Goods	18,014		23,443		35,941		44,695
Total International gross profit	$	93,548	$	104,287	$	189,762	$	209,492

Schedule of Operating Income by Reportable Segment

The following table summarizes operating income (loss) by reportable segment for the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Operating income (loss) (1) (2) (3):
North America	$	(372	)	$	(68,524	)	$	4,964		$	(70,384	)
International	(6,767		)	4,279			(9,908		)	9,524
Total operating income (loss)	$	(7,139	)	$	(64,245	)	$	(4,944	)	$	(60,860	)

(1)

Includes stock-based compensation of $24.1 million and $15.0 million for North America and $2.5 million and $1.3 million for International for the three months ended June 30, 2019 and 2018

Schedule of Total Assets by Segment

The following table summarizes total assets by reportable segment as of June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Total assets:
North America (1)	$	895,928	$	958,412
International (1)	543,280		683,730
Consolidated total assets	$	1,439,208	$	1,642,142

(1)

North America contains assets from the United States of $870.6 million and $940.5 million as of June 30, 2019 and December 31, 2018. International contains assets from Ireland of $204.6 million as of December 31, 2018. Assets from Ireland were less than 10% of consolidated total assets as of June 30, 2019. There were no other individual countries that represented more than 10% of consolidated total assets as of June 30, 2019 and December 31, 2018.

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DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (Details) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Item Effected [Line Items]
Number of segments	2
Accounting Standards Update 2018-15
Item Effected [Line Items]
Capitalization of implementation costs	$ 1.9	$ 2.8

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GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Goodwill (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Goodwill [Line Items]
Goodwill	$ 324,705	$ 325,491
Foreign currency translation	(786)
North America
Goodwill [Line Items]
Goodwill	178,685	178,685
Foreign currency translation	0
International
Goodwill [Line Items]
Goodwill	146,020	$ 146,806
Foreign currency translation	$ (786)

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GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 108,801	$ 107,570
Accumulated Amortization	69,805	62,169
Net Carrying Value	38,996	45,401
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	16,200	16,200
Accumulated Amortization	14,400	11,700
Net Carrying Value	1,800	4,500
Merchant relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	21,486	21,554
Accumulated Amortization	6,157	4,105
Net Carrying Value	15,329	17,449
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	9,467	9,476
Accumulated Amortization	7,074	6,799
Net Carrying Value	2,393	2,677
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	13,813	13,825
Accumulated Amortization	13,601	13,485
Net Carrying Value	212	340
Patents
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	21,744	20,508
Accumulated Amortization	17,254	16,451
Net Carrying Value	4,490	4,057
Other intangible assets
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	26,091	26,007
Accumulated Amortization	11,319	9,629
Net Carrying Value	$ 14,772	$ 16,378

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GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Estimated Future Amortization Expense (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remaining amounts in 2019	$ 6,384
2020	7,780
2021	7,046
2022	6,730
2023	5,582
Thereafter	5,474
Total	$ 38,996

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GOODWILL AND OTHER INTANGIBLE ASSETS - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Finite-Lived Intangible Assets [Line Items]
Intangible asset amortization expense	$ 3.8	$ 3.5	$ 7.7	$ 6.4
Minimum
Finite-Lived Intangible Assets [Line Items]
Intangible assets, useful life			1 year
Maximum
Finite-Lived Intangible Assets [Line Items]
Intangible assets, useful life			10 years

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INVESTMENTS - Summary of Investments (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Fair value	$ 10,201			$ 10,201		$ 10,340
Equity method investments	4,917	$ 32,494	$ 74,898	4,917	$ 74,898	73,902	$ 77,933	$ 82,966
Investments	39,301			39,301		108,515
Fair Value, Option, Changes in Fair Value, Gain (Loss)	(27,577)		(3,035)	(68,985)	(8,068)
Redeemable Preferred Stock
Schedule of Equity Method Investments [Line Items]
Fair value	10,201			10,201		10,340
Fair Value Option Investments
Schedule of Equity Method Investments [Line Items]
Equity method investments	4,917			4,917		73,902
Other Equity Investments
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 24,183			$ 24,183		$ 24,273
Minimum
Schedule of Equity Method Investments [Line Items]
Available for sale securities, percent ownership of voting stock	19.00%			19.00%		19.00%
Minimum | Fair Value Option Investments
Schedule of Equity Method Investments [Line Items]
Equity method investment, percent ownership of voting stock	10.00%			10.00%		10.00%
Minimum | Other Equity Investments
Schedule of Equity Method Investments [Line Items]
Equity method investment, percent ownership of voting stock	1.00%			1.00%		1.00%
Maximum
Schedule of Equity Method Investments [Line Items]
Available for sale securities, percent ownership of voting stock	25.00%			25.00%		25.00%
Maximum | Fair Value Option Investments
Schedule of Equity Method Investments [Line Items]
Equity method investment, percent ownership of voting stock	19.00%			19.00%		19.00%
Maximum | Other Equity Investments
Schedule of Equity Method Investments [Line Items]
Equity method investment, percent ownership of voting stock	19.00%			19.00%		19.00%
Monster LP
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 0			$ 0		$ 69,400
Fair Value, Option, Changes in Fair Value, Gain (Loss)	(27,949)	$ 41,500	(3,054)	(69,408)	(8,285)
Equity Method Investment, Summarized Financial Information, Revenue	131,816		84,525	$ 252,016	171,384
Discount rate				26.00%		21.00%
Equity Method Investment, Summarized Financial Information, Gross Profit (Loss)	9,542		6,574	$ 17,407	13,811
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	(31,253)		(35,447)	(60,324)	(68,867)
Equity Method Investment, Summarized Financial Information, Net Income (Loss)	$ (31,253)		$ (35,447)	$ (60,324)	$ (68,867)

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INVESTMENTS - Schedule of Activity for Available For Sale Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Abstract]
Amortized cost	$ 9,961	$ 9,961
Gross unrealized gain (loss)	240	379
Fair value	$ 10,201	$ 10,340

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INVESTMENTS - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Other than temporary impairments			$ 4,600		$ 5,400
Equity Method Investments	$ 4,917	$ 32,494	74,898	$ 4,917	74,898	$ 73,902	$ 77,933	$ 82,966
Gain (loss) from changes in fair value of investments	27,577		3,035	68,985	8,068
Other than temporary impairments on equity method investments			4,600		4,600
Monster LP
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	0			0		$ 69,400
Gain (loss) from changes in fair value of investments	27,949	$ (41,500)	3,054	$ 69,408	8,285
Discount rate				26.00%		21.00%
Nearbuy
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	4,900			$ 4,900		$ 4,500
Gain (loss) from changes in fair value of investments	$ (372)		$ (19)	$ (423)	$ (217)

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SUPPLEMENTAL CONSOLIDATED BALANCE SHEETS AND STATEMENTS OF OPERATIONS INFORMATION - Schedule of Other Income (Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Supplemental Consolidated Balance Sheet & Statement of Operations Information [Abstract]
Interest income	$ 1,915	$ 1,836	$ 3,851	$ 3,345
Interest expense	(5,442)	(5,228)	(11,133)	(10,721)
Changes in fair value of investments	(27,577)	(3,035)	(68,985)	(8,068)
Foreign currency gains (losses), net	2,609	(12,533)	930	(11,135)
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	0	(9,189)	0	(10,044)
Other Nonrecurring (Income) Expense	1	1,692	(12)	1,651
Other income (expense), net	$ (28,494)	$ (26,457)	$ (75,349)	$ (34,972)

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SUPPLEMENTAL CONSOLIDATED BALANCE SHEETS AND STATEMENTS OF OPERATIONS INFORMATION - Schedule of Prepaid and Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Supplemental Consolidated Balance Sheet & Statement of Operations Information [Abstract]
Merchandise inventories	$ 29,235	$ 33,739
Prepaid expenses	32,414	28,209
Income taxes receivable	6,693	6,717
Other	22,714	19,450
Total prepaid expenses and other current assets	$ 91,056	$ 88,115

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SUPPLEMENTAL CONSOLIDATED BALANCE SHEETS AND STATEMENTS OF OPERATIONS INFORMATION - Schedule of Accrued Merchant and Supplier Payables (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Supplemental Consolidated Balance Sheet & Statement of Operations Information [Abstract]
Accrued merchant payables	$ 333,441	$ 371,279
Accrued supplier payables (1)	130,684	280,502
Total accrued merchant and supplier payables	$ 464,125	$ 651,781

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SUPPLEMENTAL CONSOLIDATED BALANCE SHEETS AND STATEMENTS OF OPERATIONS INFORMATION - Schedule of Accrued Expense and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Supplemental Consolidated Balance Sheet & Statement of Operations Information [Abstract]
Current portion of lease obligations	$ 25,000
Refunds reserve	19,812	$ 27,957
Compensation and benefits	56,600	56,173
Accrued marketing	29,227	39,094
Customer credits	17,516	15,118
Income taxes payable	5,320	8,987
Deferred revenue	19,949	25,452	$ 25,500
Current portion of lease obligations (1)	43,033	17,207
Other	67,153	77,046
Total accrued expenses and other current liabilities	$ 258,610	$ 267,034

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SUPPLEMENTAL CONSOLIDATED BALANCE SHEETS AND STATEMENTS OF OPERATIONS INFORMATION - Schedule of Other Non-current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Supplemental Consolidated Balance Sheet & Statement of Operations Information [Abstract]
Contingent income tax liabilities	$ 32,756	$ 39,858
Deferred rent (1)	0	32,186
Deferred income taxes	4,164	6,619
Other	16,820	22,025
Total other non-current liabilities	$ 53,740	$ 100,688

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FINANCING ARRANGEMENTS - Schedule of Notes (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018	Apr. 04, 2016
Debt Instrument [Line Items]
Principal amount	$ 250,000	$ 250,000
Less: debt discount	(41,900)	(48,331)	$ (4,800)
Net carrying amount of liability component	$ 208,100	201,669
Remaining term	2 years 9 months
Additional Paid-In Capital
Debt Instrument [Line Items]
Net carrying amount of equity component	$ 67,014	$ 67,014

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FINANCING ARRANGEMENTS - Schedule of Convertible Debt Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Debt Disclosure [Abstract]
Contractual interest (3.25% of the principal amount per annum)	$ 2,032	$ 2,032	$ 4,064	$ 4,064
Amortization of debt discount	3,256	2,940	6,431	5,806
Total	$ 5,288	$ 4,972	$ 10,495	$ 9,870

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FINANCING ARRANGEMENTS - Convertible Senior Notes (Details) - USD ($)		6 Months Ended		12 Months Ended
	Apr. 04, 2016	Jun. 30, 2019	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2018
Debt Instrument [Line Items]
Remaining term		2 years 9 months
Net proceeds			$ 243,200,000
Stated interest rate	3.25%
Principal amount converted initially	$ 1,000
Number of shares converted (in shares)	185.1852
Closing price of stock, trigger price (in usd per share)	150.00%
Number of threshold trading days	20
Consecutive trading days	30
Effective interest rate		9.75%
Debt related commitment fees and issuance costs				$ 6,800,000
Debt issuance costs	$ 4,800,000	$ 41,900,000			$ 48,331,000
Equity component of convertible debt				$ 2,000,000.0
Estimated fair value of convertible notes		$ 267,100,000			$ 257,100,000
Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount of convertible senior notes	$ 250,000,000.0
Conversion price (in usd per share)	$ 5.40
Share Price		$ 3.58

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FINANCING ARRANGEMENTS - Note Hedges and Warrants (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended	12 Months Ended
	May 09, 2016	Jun. 30, 2016	Dec. 31, 2016	Apr. 04, 2016
Debt Disclosure [Abstract]
Cost of convertible note hedges		$ 59.1
Number of shares available to be purchased (in shares)	46.3
Strike price (in usd per share)	$ 5.40
Cash proceeds from issuance of warrants			$ 35.5
Exercise price (in usd per share)				$ 8.50

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FINANCING ARRANGEMENTS - Revolving Credit Facility (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2019	Dec. 31, 2018	Apr. 04, 2016
Debt Instrument [Line Items]
Aggregate principal amount	$ 400.0
Liability recorded for debt issuance costs	2.3
Stated interest rate			3.25%
Unrestricted cash covenant amount	250.0
Amount of accounts held with lenders	125.0
Outstanding amount of lines of credit	$ 18.2	$ 19.2
Minimum
Debt Instrument [Line Items]
Unused commitment fee percentage	0.25%
Maximum
Debt Instrument [Line Items]
Unused commitment fee percentage	0.35%
Letter of Credit
Debt Instrument [Line Items]
Aggregate principal amount	$ 75.0
Letter of Credit | Base Rate | Minimum
Debt Instrument [Line Items]
Stated interest rate	0.50%
Letter of Credit | Base Rate | Maximum
Debt Instrument [Line Items]
Stated interest rate	2.00%
Geographic Distribution, Domestic
Debt Instrument [Line Items]
Outstanding stock percentage	100.00%
Geographic Distribution, Foreign
Debt Instrument [Line Items]
Outstanding stock percentage	65.00%

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LEASES - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2016	Jan. 01, 2019
Right-of-use assets - operating leases	$ 127,305,000		$ 127,305,000			$ 109,600,000
Payments to be received	27,074		27,074
Sublease income	$ 1,312,000		$ 2,624,000
Weighted average remaining lease term under finance leases	2 years		2 years
Weighted average remaining lease term under operating leases	5 years		5 years
Weighted average discount rate under finance leases	5.10%		5.10%
Weighted average discount rate under operating leases	5.60%		5.60%
Uptake
Sublease income	$ 500,000	$ 500,000	$ 1,200,000	$ 1,000,000.0	$ 18,200,000
Minimum
Discount rate						1.50%
Maximum
Discount rate						6.90%
Accumulated Deficit | Accounting Standards Update 2016-02
Cumulative effect adjustment						$ 0

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LEASES Right-of-Use Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
Leases [Abstract]
Right-of-use assets - operating leases	$ 127,305	$ 109,600
Right-of-use assets - finance leases (1)	35,201
Total right-of-use assets, gross	162,506
Less: accumulated depreciation and amortization	(25,572)
Right-of-use assets, net	$ 136,934

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LEASES Total Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Amortization of right-of-use assets	$ 5,999	$ 12,755
Interest on lease liabilities	266	573
Total finance lease cost	6,265	13,328
Operating lease cost	8,737	17,211
Variable lease cost	1,825	3,909
Short-term lease cost	169	210
Sublease income, gross	(1,312)	(2,624)
Total lease cost	$ 15,684	$ 32,034

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LEASES Future Lease Amount (Details) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Finance Lease, Liability, Payments, Remainder of Fiscal Year	$ 6,972,000
Finance Lease, Liability, Payments, Due Year Two	8,971,000
Finance Lease, Liability, Payments, Due Year Three	5,052,000
Finance Lease, Liability, Payments, Due Year Four	715,000
Finance Lease, Liability, Payments, Due Year Five	12,000
Finance Lease, Liability, Payments, Due after Year Five	0
Finance Lease, Liability, Payment, Due	21,722,000
Finance Lease, Liability, Undiscounted Excess Amount	(1,080,000)
Finance Lease, Liability	20,642,000
Finance Lease, Liability, Current	(11,166,000)
Finance Lease, Liability, Noncurrent	9,476,000
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	19,787,000
Lessee, Operating Lease, Liability, Payments, Due Year Two	35,994,000
Lessee, Operating Lease, Liability, Payments, Due Year Three	32,720,000
Lessee, Operating Lease, Liability, Payments, Due Year Four	31,962,000
Lessee, Operating Lease, Liability, Payments, Due Year Five	24,516,000
Lessee, Operating Lease, Liability, Payments, Due after Year Five	33,175,000
Lessee, Operating Lease, Liability, Payments, Due	178,154,000
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(24,761,000)
Operating Lease, Liability	153,393,000
Operating Lease, Liability, Current	(31,867,000)
Operating Lease, Liability, Noncurrent	$ 121,526,000	$ 0

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LEASES Sublease (Details)	Jun. 30, 2019 USD ($)
Leases [Abstract]
Lessor, Operating Lease, Payments to be Received, Remainder of Fiscal Year	$ 2,603
Lessor, Operating Lease, Payments to be Received, Two Years	5,027
Lessor, Operating Lease, Payments to be Received, Three Years	5,065
Lessor, Operating Lease, Payments to be Received, Four Years	5,103
Lessor, Operating Lease, Payments to be Received, Five Years	4,385
Lessor, Operating Lease, Payments to be Received, Thereafter	4,891
Payments to be received	$ 27,074

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LEASES Supplemental Cash Flow (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Leases [Abstract]
Operating cash flows from finance leases	$ 573
Operating cash flows from operating leases	(13,145)
Financing cash flows from finance leases	(12,628)
Right-of-use assets obtained in exchange for lease liabilities:	2,872
Operating leases	$ 17,853

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COMMITMENTS AND CONTINGENCIES - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Mar. 09, 2017
Maximum exposure of indemnification liability	$ 13.3
Gain on expiration of indemnity liability	2.2
Indemnification Liabilities	$ 3.2
Groupon Latin America [Member]
Estimated indemnification liability		$ 5.4

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STOCKHOLDERS' EQUITY AND COMPENSATION ARRANGEMENTS Narrative (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Sep. 30, 2018
Equity, Class of Treasury Stock [Line Items]
Common Stock, Shares Authorized	2,010,000,000				2,010,000,000		2,010,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized					8,903,280
Stock Repurchase Program, Authorized Amount								$ 300.0
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage					25.00%
Stock Repurchased During Period, Shares	4,228,148,000,000				8,636,143,000,000
Stock Repurchased During Period, Value	$ 15.1				$ 30.1
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	260,000,000.0				260,000,000.0
Common Stock, Capital Shares Reserved for Future Issuance	64,223,134				64,223,134
Share-based Compensation Arrangement By Share-based Payment Award, Fair Value Assumptions, Cost Of Equity Rate					12.80%
Employee Stock Option
Equity, Class of Treasury Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period					10 years
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	20,000,000				20,000,000
Minimum
Equity, Class of Treasury Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period					3 years
Minimum | Restricted Stock Units (RSUs) [Member]
Equity, Class of Treasury Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period					1 year
Maximum
Equity, Class of Treasury Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period					4 years
Maximum | Restricted Stock Units (RSUs) [Member]
Equity, Class of Treasury Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period						4 years
Common Stock
Equity, Class of Treasury Stock [Line Items]
Stock Issued During Period, Shares, Employee Stock Purchase Plans		719,297		746,773	719,297	746,773
Common Class A [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchased During Period, Shares			0

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STOCKHOLDERS' EQUITY AND COMPENSATION ARRANGEMENTS Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Payment Arrangement, Amount Capitalized	$ 2,200	$ 2,000	$ 3,500	$ 3,700
Share-based Payment Arrangement, Noncash Expense	26,563	16,318	42,974	35,644
Cost of Sales [Member]
Share-based Payment Arrangement, Noncash Expense	380	288	758	684
Selling and Marketing Expense [Member]
Share-based Payment Arrangement, Noncash Expense	1,490	1,763	2,915	3,557
Selling, General and Administrative Expenses [Member]
Share-based Payment Arrangement, Noncash Expense	24,693	14,215	39,301	31,303
Other Income [Member]
Share-based Payment Arrangement, Noncash Expense	0	$ 52	0	$ 100
Restricted stock units
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 118,400		$ 118,400
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			1 year 7 months 24 days

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STOCKHOLDERS' EQUITY AND COMPENSATION ARRANGEMENTS RSU (Details) - $ / shares	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	35,294,764	26,623,432
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 3.92	$ 4.47
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	22,723,241
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	7,787,055
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 3.25
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value	$ 4.45
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(6,264,854)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Weighted Average Grant Date Fair Value	$ 4.27
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Minimum [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	1 year

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STOCKHOLDERS' EQUITY AND COMPENSATION ARRANGEMENTS Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Common Stock, Shares Authorized	2,010,000,000				2,010,000,000		2,010,000,000
Share-based Payment Arrangement, Amount Capitalized	$ 2,200		$ 2,000		$ 3,500	$ 3,700
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding	170,287				170,287		212,787
Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price	$ 1.95				$ 1.95		$ 1.80
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term					11 months 1 day		1 year 4 months 13 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 278				$ 278		$ 298
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period					42,500
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price					$ 0.96
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period					3 years
Minimum [Member] | Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period					1 year
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period					4 years
Maximum [Member] | Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period						4 years
Common Stock
Stock Issued During Period, Shares, Employee Stock Purchase Plans		719,297		746,773	719,297	746,773
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	30,000	12,500	665,343	2,400
2008 Plan [Member]
Common Stock, Shares Authorized	64,618,500				64,618,500
2010 Plan [Member]
Common Stock, Shares Authorized	20,000,000				20,000,000
2011 Plan [Member]
Common Stock, Shares Authorized	187,500,000				187,500,000

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STOCKHOLDERS' EQUITY AND COMPENSATION ARRANGEMENTS PSU (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Price	$ 6.00
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate	49.80%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	8,903,280
Share-based Compensation Arrangement By Share-based Payment Award, Fair Value Assumptions, Cost Of Equity Rate	12.80%
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 15.8
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 11 months 8 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	4,663,552	3,431,918
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 3.56	$ 4.90
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	4,622,995
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 3.44
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	(777,573)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$ 4.88
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(2,613,788)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 4.71
Market-based Performance Share Units [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 16.7
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	7 months 28 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	8,486,708	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 3.03	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	8,486,708
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 3.03
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 0

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REVENUE RECOGNITION - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Capitalized Contract Cost [Line Items]
Deferred revenue	$ 19,949	$ 25,500	$ 19,949	$ 25,500	$ 25,452
Deferred Revenue, Revenue Recognized			25,400
Amortization of Deferred Charges	5,100	$ 6,500	10,500	$ 13,300
Revenue from Contract with Customers, Revenue constrained and ti be recognized in future periods	15,300		15,300		13,700
Prepaid expenses and other current assets
Capitalized Contract Cost [Line Items]
Deferred Costs	2,600		2,600		2,900
Other non-current assets
Capitalized Contract Cost [Line Items]
Deferred Costs	$ 10,200		$ 10,200		$ 11,300

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REVENUE RECOGNITION - Liability for Customer Credits Rollforward (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Revenue from Contract with Customer [Abstract]
Deferred Revenue, Revenue Recognized	$ 25,400
Movement in Customer Refundable Fees [Roll Forward]
Balance as of December 31, 2018	15,118
Credits issued	56,477
Credits redeemed	(49,928)
Customer Refundable Fees, Revenue Recognized	(4,177)
Foreign currency translation	26
Balance as of June 30, 2019	$ 17,516

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INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating Loss Carryforwards [Line Items]
Income tax expense (benefit)	$ 2,012	$ 1,552	$ (1,478)	$ (783)
Income (loss) from continuing operations	(35,633)	$ (90,702)	(80,293)	$ (95,832)
Accounting Standards Update 2014-09 | Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Income tax expense (benefit)			6,400
International
Operating Loss Carryforwards [Line Items]
Proposed income tax assessment penalties	109,900
Decrease in unrecognized benefits	$ 21,000		$ 21,000

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FAIR VALUE MEASUREMENTS - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Apr. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other than temporary impairments on equity method investments	$ 4,600		$ 4,600
Document Fiscal Year Focus		2019
Contingent consideration	$ 1,589	$ 0	$ 1,589	$ 2,500

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FAIR VALUE MEASUREMENTS - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Method Investments	$ 4,917	$ 32,494	$ 73,902	$ 74,898	$ 77,933	$ 82,966
Fair value	10,201		10,340
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	1,239	$ 1,586	1,529	$ 1,542	$ 0	$ 0
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Method Investments	4,917		73,902
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Method Investments	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	0		0
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Method Investments	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	0		0
Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Method Investments	4,917		73,902
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	1,239		1,529
Redeemable Preferred Stock | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	10,201		10,340
Redeemable Preferred Stock | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	0		0
Redeemable Preferred Stock | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	0		0
Redeemable Preferred Stock | Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	$ 10,201		$ 10,340

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FAIR VALUE MEASUREMENTS - Fair Value, Assets and Liabilities, Reconciliation of Level 3 Inputs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		$ (3,035)	$ (68,985)	$ (8,068)
Equity Method Investments	$ 4,917	74,898	4,917	74,898	$ 32,494	$ 73,902	$ 77,933	$ 82,966
Gain (loss) from changes in fair value of investments	(27,577)	(3,035)	(68,985)	(8,068)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	1,239	1,542	1,239	1,542	1,586	1,529	0	0
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss)	5	(47)	27	(47)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances	0	1,589	0	1,589
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(312)	0	(312)	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	5	14	27	14
Other than temporary impairments		(4,600)		(5,400)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Foreign Currency Translation	(40)	(61)	(5)	(61)
Fair Value Option Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	(27,577)
Convertible Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	0	2,599	0	2,405
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	(541)	0	(1,042)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0	2,215	0	2,432
available-for-sale investment transfer to other equity investment	0	(2,508)	0	(2,508)
Debt Securities, Available-for-sale	0	10,236	0	10,236	0	0	11,070	11,354
Redeemable Preferred Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	(193)	(4,615)	(139)	(5,470)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	10,201	9,961	10,201	9,961	$ 10,394	$ 10,340	$ 14,576	$ 15,431
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(193)	0	(139)	0
Other than temporary impairments	$ 0	$ (4,615)	$ 0	$ (5,470)

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INCOME (LOSS) PER SHARE - Schedule of Computation of Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Numerator
Net income (loss) - continuing operations	$ (37,645)	$ (92,254)	$ (78,815)	$ (95,049)
Less: Net income (loss) attributable to noncontrolling interests	2,601	2,780	6,080	6,873
Net income (loss) attributable to common stockholders - continuing operations	(40,246)	(95,034)	(84,895)	(101,922)
Income (loss) from discontinued operations, net of tax	0	0	2,162	0
Net income (loss) attributable to Groupon, Inc.	$ (40,246)	$ (95,034)	$ (82,733)	$ (101,922)
Denominator
Weighted-average common shares outstanding (in shares)	567,962,461	565,284,705	569,014,065	563,502,954
Basic and diluted net income (loss) per share:
Continuing operations (in usd per share)	$ (0.07)	$ (0.17)	$ (0.15)	$ (0.18)
Discontinued operations (in usd per share)	0.00	0.00	0.01	0.00
Basic and diluted net income (loss) per share (in usd per share)	$ (0.07)	$ (0.17)	$ (0.14)	$ (0.18)

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INCOME (LOSS) PER SHARE - Schedule of Weighted-Average Potentially Dilutive Instruments (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	131,205,796	126,810,412	126,319,996	125,384,572
Performance Shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares issuable upon vesting of outstanding performance share units (in shares)			16,966,170	7,706,474
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	37,031,941	32,602,563	32,060,396	30,378,335
Other stock-based compensation awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	1,581,255	1,615,249	1,667,000	2,413,637
Convertible senior notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	46,296,300	46,296,300	46,296,300	46,296,300
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	46,296,300	46,296,300	46,296,300	46,296,300

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SEGMENT INFORMATION Schedule of Revenue by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Schedule of Revenue by Segment [Line Items]
Total revenue	$ 532,577	$ 617,396	$ 1,110,987	$ 1,243,936
North America
Schedule of Revenue by Segment [Line Items]
Total revenue	324,660	380,264	681,825	773,520
International
Schedule of Revenue by Segment [Line Items]
Total revenue	207,917	237,132	429,162	470,416
UNITED STATES
Schedule of Revenue by Segment [Line Items]
Revenues	319,200	371,100	668,000	756,500
UNITED KINGDOM
Schedule of Revenue by Segment [Line Items]
Revenues	71,300	91,500	152,400	174,500
Product
Schedule of Revenue by Segment [Line Items]
Total revenue	254,974	321,744	547,557	646,487
Product | Goods | North America
Schedule of Revenue by Segment [Line Items]
Total revenue	127,739	170,710	282,459	351,597
Product | Goods | International
Schedule of Revenue by Segment [Line Items]
Total revenue	127,235	151,034	265,098	294,890
Service
Schedule of Revenue by Segment [Line Items]
Total revenue	277,603	295,652	563,430	597,449
Service | Local | North America
Schedule of Revenue by Segment [Line Items]
Total revenue	177,082	185,870	357,459	373,281
Service | Local | International
Schedule of Revenue by Segment [Line Items]
Total revenue	69,995	71,425	143,185	146,003
Service | Goods | North America
Schedule of Revenue by Segment [Line Items]
Total revenue	3,714	3,796	6,841	8,670
Service | Goods | International
Schedule of Revenue by Segment [Line Items]
Total revenue	2,610	4,967	4,065	8,381
Service | Travel | North America
Schedule of Revenue by Segment [Line Items]
Total revenue	16,125	19,888	35,066	39,972
Service | Travel | International
Schedule of Revenue by Segment [Line Items]
Total revenue	$ 8,077	$ 9,706	$ 16,814	$ 21,142

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SEGMENT INFORMATION Schedule of Gross Profit by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Gross profit	$ 292,132	$ 323,658	$ 598,148	$ 648,543
North America
Segment Reporting Information [Line Items]
Gross profit	198,584	219,371	408,386	439,051
International
Segment Reporting Information [Line Items]
Gross profit	93,548	104,287	189,762	209,492
Service | Local | North America
Segment Reporting Information [Line Items]
Gross profit	157,673	165,285	318,755	332,041
Service | Local | International
Segment Reporting Information [Line Items]
Gross profit	65,780	67,360	134,758	137,575
Service | Goods | North America
Segment Reporting Information [Line Items]
Gross profit	2,995	2,990	5,558	6,931
Service | Goods | International
Segment Reporting Information [Line Items]
Gross profit	2,384	4,565	3,652	7,652
Service | Travel | North America
Segment Reporting Information [Line Items]
Gross profit	12,806	16,303	28,074	32,305
Service | Travel | International
Segment Reporting Information [Line Items]
Gross profit	7,370	8,919	15,411	19,570
Product | Goods | North America
Segment Reporting Information [Line Items]
Gross profit	25,110	34,793	55,999	67,774
Product | Goods | International
Segment Reporting Information [Line Items]
Gross profit	$ 18,014	$ 23,443	$ 35,941	$ 44,695

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SEGMENT INFORMATION Schedule of Operating Income by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Schedule of Operating Income (Loss) by Segment
Income (loss) from operations	$ (7,139)	$ (64,245)	$ (4,944)	$ (60,860)
Stock-based compensation	26,563	16,318	42,974	35,644
Acquisition Related (Benefit) Expense, Net				700
North America
Schedule of Operating Income (Loss) by Segment
Income (loss) from operations	(372)	(68,524)	4,964	(70,384)
Stock-based compensation	24,100	15,000	38,900	32,900
International
Schedule of Operating Income (Loss) by Segment
Income (loss) from operations	(6,767)	4,279	(9,908)	9,524
Stock-based compensation	$ 2,500	1,300	$ 4,100	$ 2,700
IBM [Member]
Schedule of Operating Income (Loss) by Segment
Loss Contingency Accrual, Provision		$ 75,000

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SEGMENT INFORMATION Schedule of Total Assets by Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 1,439,208	$ 1,642,142
North America
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	895,928	958,412
International
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	543,280	683,730
UNITED STATES
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 870,600	940,500
IRELAND
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		$ 204,600

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Label	Element	Value
Restricted Cash, Current	us-gaap_RestrictedCashCurrent	$ 4,250,000
Restricted Cash, Current	us-gaap_RestrictedCashCurrent	3,320,000
Restricted Cash, Current	us-gaap_RestrictedCashCurrent	2,340,000
Restricted Cash, Noncurrent	us-gaap_RestrictedCashNoncurrent	398,000
Restricted Cash, Noncurrent	us-gaap_RestrictedCashNoncurrent	387,000
Restricted Cash, Noncurrent	us-gaap_RestrictedCashNoncurrent	$ 386,000