10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 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 September 30, 2021

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 1-33579

INTERDIGITAL, INC.

(Exact Name of Registrant as Specified in Its Charter)

Pennsylvania	82-4936666
(State or Other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)

200 Bellevue Parkway, Suite 300, Wilmington, DE 19809-3727

(Address of Principal Executive Offices and Zip Code)

(302) 281-3600

(Registrant’s Telephone Number, Including Area Code)

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

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $0.01 per share	IDCC	NASDAQ Stock Market LLC

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 (Section 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. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No þ

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Common Stock, par value $0.01 per share	30,677,998
Title of Class	Outstanding at November 2, 2021

INDEX

	PAGES
Part I — Financial Information:	3
Item 1 Financial Statements (unaudited):	3
Condensed Consolidated Balance Sheets — September 30, 2021 and December 31, 2020	3
Condensed Consolidated Statements of Income — Three and Nine Months Ended September 30, 2021 and 2020	4
Condensed Consolidated Statements of Comprehensive Income — Three and Nine Months Ended September 30, 2021 and 2020	5
Condensed Consolidated Statements of Shareholders Equity — Three and Nine Months Ended September 30, 2021 and 2020	6
Condensed Consolidated Statements of Cash Flows — Nine Months Ended September 30, 2021 and 2020	8
Notes to Condensed Consolidated Financial Statements	9
Item 2 Management’s Discussion and Analysis of Financial Condition and Results of Operations	23
Item 3 Quantitative and Qualitative Disclosures About Market Risk	34
Item 4 Controls and Procedures	35
Part II — Other Information:	36
Item 1 Legal Proceedings	36
Item 1A Risk Factors	36
Item 2 Unregistered Sales of Equity Securities and Use of Proceeds	38
Item 4 Mine Safety Disclosures	38
Item 6 Exhibits	39
SIGNATURES	40

InterDigital® is a registered trademark of InterDigital, Inc. All other trademarks, service marks and/or trade names appearing in this Quarterly Report on Form 10-Q are the property of their respective holders.

PART I — FINANCIAL INFORMATION

Item 1. FINANCIAL STATEMENTS

INTERDIGITAL, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except per share data)

(unaudited)

	SEPTEMBER 30, 2021		DECEMBER 31, 2020
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	467,606	$	473,474
Short-term investments	433,200		453,173
Accounts receivable, less allowances of $322 and $0	141,657		16,008
Prepaid and other current assets	80,304		59,894
Total current assets	1,122,767		1,002,549
PROPERTY AND EQUIPMENT, NET	14,182		16,630
PATENTS, NET	371,857		418,343
DEFERRED TAX ASSETS	94,850		80,380
OTHER NON-CURRENT ASSETS, NET	96,956		98,373
Total non-current assets	577,845		613,726
TOTAL ASSETS	$	1,700,612	$	1,616,275
LIABILITIES AND SHAREHOLDERS’ EQUITY
CURRENT LIABILITIES:
Accounts payable	$	9,555	$	10,979
Accrued compensation and related expenses	33,838		32,413
Deferred revenue	325,375		219,935
Dividends payable	10,740		10,786
Other accrued expenses	38,521		21,649
Total current liabilities	418,029		295,762
LONG-TERM DEBT	421,420		367,992
LONG-TERM DEFERRED REVENUE	66,673		108,069
OTHER LONG-TERM LIABILITIES	59,173		47,886
TOTAL LIABILITIES	965,295		819,709
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS’ EQUITY:
Preferred Stock, $0.10 par value, 14,399 shares authorized, 0 shares issued and outstanding	—		—
Common Stock, $0.01 par value, 100,000 shares authorized, 71,616 and 71,389 shares issued and 30,689 and 30,816 shares outstanding	716		714
Additional paid-in capital	762,178		738,481
Retained earnings	1,364,378		1,413,969
Accumulated other comprehensive loss	(390)		(184)
	2,126,882		2,152,980
Treasury stock, 40,927 and 40,573 shares of common held at cost	1,402,611		1,379,611
Total InterDigital, Inc. shareholders’ equity	724,271		773,369
Noncontrolling interest	11,046		23,197
Total equity	735,317		796,566
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$	1,700,612	$	1,616,275

The accompanying notes are an integral part of these statements.

3

INTERDIGITAL, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(in thousands, except per share data)

(unaudited)

	FOR THE THREE MONTHS ENDED SEPTEMBER 30,				FOR THE NINE MONTHS ENDED SEPTEMBER 30,
	2021		2020		2021		2020
REVENUES:
Patent licensing royalties	$	142,749	$	85,222	$	309,127	$	259,404
Technology solutions	747		2,271		4,467		8,797
Total Revenue	143,496		87,493		313,594		268,201
OPERATING EXPENSES:
Patent administration and licensing	56,150		40,364		133,694		119,167
Development	22,546		20,845		66,999		61,755
Selling, general and administrative	20,978		10,854		46,994		35,251
Restructuring activities	7,045		—		20,290		—
Total Operating expenses	106,719		72,063		267,977		216,173
Income from operations	36,777		15,430		45,617		52,028
INTEREST EXPENSE	(5,773)		(10,365)		(19,429)		(30,881)
OTHER (EXPENSE) INCOME, NET	(1,537)		3,994		2,226		13,806
Income before income taxes	29,467		9,059		28,414		34,953
INCOME TAX (PROVISION) BENEFIT	(4,253)		12,843		(6,039)		5,879
NET INCOME	$	25,214	$	21,902	$	22,375	$	40,832
Net loss attributable to noncontrolling interest	(1,014)		(1,882)		(11,042)		(5,319)
NET INCOME ATTRIBUTABLE TO INTERDIGITAL, INC.	$	26,228	$	23,784	$	33,417	$	46,151
NET INCOME PER COMMON SHARE — BASIC	$	0.85	$	0.77	$	1.09	$	1.50
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING — BASIC	30,737		30,804		30,792		30,762
NET INCOME PER COMMON SHARE — DILUTED	$	0.83	$	0.76	$	1.07	$	1.49
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING — DILUTED	31,431		31,119		31,272		31,029

The accompanying notes are an integral part of these statements.

4

INTERDIGITAL, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in thousands)

(unaudited)

	FOR THE THREE MONTHS ENDED SEPTEMBER 30,				FOR THE NINE MONTHS ENDED SEPTEMBER 30,
	2021		2020		2021		2020
Net income	$	25,214	$	21,902	$	22,375	$	40,832
Unrealized (loss) gain on investments, net of tax	(67)		(362)		(206)		82
Comprehensive income	$	25,147	$	21,540	$	22,169	$	40,914
Comprehensive loss attributable to noncontrolling interest	(1,014)		(1,882)		(11,042)		(5,319)
Total comprehensive income attributable to InterDigital, Inc.	$	26,161	$	23,422	$	33,211	$	46,233

The accompanying notes are an integral part of these statements.

5

INTERDIGITAL, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY

(in thousands, except per share data)

(unaudited)

	Common Stock			Additional  Paid-In Capital		Retained Earnings		Accumulated Other Comprehensive  Loss		Treasury Stock			Non-Controlling Interest		Total Shareholders' Equity
	Shares	Amount								Shares	Amount
BALANCE, DECEMBER 31, 2019	71,268	$	712	$	727,402	$	1,412,779	$	(74)	40,567	$	(1,379,262)	$	24,724	$	786,281
Net income attributable to InterDigital, Inc.	—	—		—		116		—		—	—		—		116
Net loss attributable to noncontrolling interest	—	—		—		—		—		—	—		(1,777)		(1,777)
Net change in unrealized gain on short-term investments	—	—		—		—		32		—	—		—		32
Dividends declared ($0.35 per share)	—	—		84		(10,847)		—		—	—		—		(10,763)
Exercise of common stock options	27	1		777		—		—		—	—		—		778
Issuance of common stock, net	27	—		(725)		—		—		—	—		—		(725)
Amortization of unearned compensation	—	—		2,003		—		—		—	—		—		2,003
Repurchase of common stock	—	—		—		—		—		6	(349)		—		(349)
BALANCE, MARCH 31, 2020	71,322	$	713	$	729,541	$	1,402,048	$	(42)	40,573	$	(1,379,611)	$	22,947	$	775,596
Net income attributable to InterDigital, Inc.	—	—		—		22,251		—		—	—		—		22,251
Net loss attributable to noncontrolling interest	—	—		—		—		—		—	—		(1,660)		(1,660)
Net change in unrealized gain on short-term investments	—	—		—		—		412		—	—		—		412
Dividends declared ($0.35 per share)	—	—		136		(10,917)		—		—	—		—		(10,781)
Exercise of common stock options	19	—		1,014		—		—		—	—		—		1,014
Issuance of common stock, net	36	—		(755)		—		—		—	—		—		(755)
Amortization of unearned compensation	—	—		4,629		—		—		—	—		—		4,629
BALANCE, JUNE 30, 2020	71,377	$	713	$	734,565	$	1,413,382	$	370	40,573	$	(1,379,611)	$	21,287	$	790,706
Net income attributable to InterDigital, Inc.	—	—		—		23,784		—		—	—		—		23,784
Net loss attributable to noncontrolling interest	—	—		—		—		—		—	—		(1,882)		(1,882)
Net change in unrealized loss on short-term investments	—	—		—		—		(362)		—	—		—		(362)
Dividends declared ($0.35 per share)	—	—		145		(10,927)		—		—	—		—		(10,782)
Exercise of common stock options	—	—		—		—		—		—	—		—		—
Issuance of common stock, net	2	—		(55)		—		—		—	—		—		(55)
Amortization of unearned compensation	—	—		1,267		—		—		—	—		—		1,267
BALANCE, SEPTEMBER 30, 2020	71,379	$	713	$	735,922	$	1,426,239	$	8	40,573	$	(1,379,611)	$	19,405	$	802,676

6

	Common Stock			Additional  Paid-In Capital		Retained Earnings		Accumulated Other Comprehensive  Loss		Treasury Stock			Non-Controlling Interest		Total Shareholders' Equity
	Shares	Amount								Shares	Amount
BALANCE, DECEMBER 31, 2020	71,389	$	714	$	738,481	$	1,413,969	$	(184)	40,573	$	(1,379,611)	$	23,197	$	796,566
Adjustment to Retained Earnings related to adoption of ASU 2020-06	—	—		—		(50,184)		—		—	—		—		(50,184)
Net income attributable to InterDigital, Inc.	—	—		—		5,571		—		—	—		—		5,571
Net loss attributable to noncontrolling interest	—	—		—		—		—		—	—		(1,613)		(1,613)
Noncontrolling interest distribution	—	—		—		—		—		—	—		(1,109)		(1,109)
Net change in unrealized loss on short-term investments	—	—		—		—		(70)		—	—		—		(70)
Dividends declared ($0.35 per share)	—	—		210		(10,976)		—		—	—		—		(10,766)
Exercise of common stock options	32	—		737		—		—		—	—		—		737
Issuance of common stock, net	55	—		(2,962)		—		—		—	—		—		(2,962)
Amortization of unearned compensation	—	—		2,153		—		—		—	—		—		2,153
Repurchase of common stock	—	—		—		—		—		91	(5,750)		—		(5,750)
BALANCE, MARCH 31, 2021	71,476	$	714	$	738,619	$	1,358,380	$	(254)	40,664	$	(1,385,361)	$	20,475	$	732,573
Net income attributable to InterDigital, Inc.	—	—		—		1,618		—		—	—		—		1,618
Net loss attributable to noncontrolling interest	—	—		—		—		—		—	—		(8,415)		(8,415)
Net change in unrealized loss on short-term investments	—	—		—		—		(69)		—	—		—		(69)
Dividends declared ($0.35 per share)	—	—		158		(10,925)		—		—	—		—		(10,767)
Exercise of common stock options	71	1		3,631		—		—		—	—		—		3,632
Issuance of common stock, net	41	—		(711)		—		—		—	—		—		(711)
Amortization of unearned compensation	—	—		3,775		—		—		—	—		—		3,775
Repurchase of common stock	—	—		—		—		—		82	(5,391)		—		(5,391)
BALANCE, JUNE 30, 2021	71,588	$	715	$	745,472	$	1,349,073	$	(323)	40,746	$	(1,390,752)	$	12,060	$	716,245
Net income attributable to InterDigital, Inc.	—	—		—		26,228		—		—	—		—		26,228
Net loss attributable to noncontrolling interest	—	—		—		—		—		—	—		(1,014)		(1,014)
Net change in unrealized gain (loss) on short-term investments	—	—		—		—		(67)		—	—		—		(67)
Dividends declared ($0.35 per share)	—	—		183		(10,923)		—		—	—		—		(10,740)
Exercise of common stock options	23	1		1,515		—		—		—	—		—		1,516
Issuance of common stock, net	5	—		(74)		—		—		—	—		—		(74)
Amortization of unearned compensation	—	—		15,082		—		—		—	—		—		15,082
Repurchase of common stock	—	—		—		—		—		181	(11,859)		—		(11,859)
BALANCE, SEPTEMBER 30, 2021	71,616	$	716	$	762,178	$	1,364,378	$	(390)	40,927	$	(1,402,611)	$	11,046	$	735,317

The accompanying notes are an integral part of these statements.

7

INTERDIGITAL, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(unaudited)

	FOR THE NINE MONTHS ENDED SEPTEMBER 30,
	2021		2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$	22,375	$	40,832
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	58,971		61,027
Non-cash interest expense, net	5,240		13,202
Non-cash change in fair-value	(949)		(5,501)
Change in deferred revenue	64,044		53,066
Deferred income taxes	(14,416)		(5,518)
Share-based compensation	21,010		7,899
Impairment of patents	11,000		—
Other	—		(63)
Increase in assets
Receivables	(125,649)		(10)
Deferred charges and other assets	(13,464)		(26,745)
Increase (decrease) in liabilities:
Accounts payable	2,266		(1,675)
Accrued compensation and other expenses	28,735		7,698
Net cash provided by operating activities	59,163		144,212
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of short-term investments	(498,151)		(187,707)
Sales of short-term investments	516,715		195,072
Purchases of property and equipment	(1,877)		(9,875)
Capitalized patent costs	(28,145)		(23,726)
Long-term investments	(1,091)		4,260
Net cash used in investing activities	(12,549)		(21,976)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from exercise of stock options	5,885		1,792
Payments on long-term debt	—		(94,909)
Repurchase of common stock	(23,000)		(349)
Non-controlling interest distribution	(1,109)		—
Taxes withheld upon restricted stock unit vestings	(3,747)		(1,535)
Dividends paid	(32,319)		(32,290)
Net cash used in financing activities	(54,290)		(127,291)
NET DECREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(7,676)		(5,055)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF PERIOD	477,663		757,098
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD	$	469,987	$	752,043

Refer to Note 1, "Basis of Presentation," for additional supplemental cash flow information. Additionally, refer to Note 6, "Cash, Concentration of Credit Risk and Fair Value of Financial Instruments" for a reconciliation of cash, cash equivalents and restricted cash to the condensed consolidated balance sheets.

The accompanying notes are an integral part of these statements.

8

INTERDIGITAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

September 30, 2021

(unaudited)

1. BASIS OF PRESENTATION

In the opinion of management, the accompanying unaudited, condensed consolidated financial statements contain all adjustments, consisting only of normal recurring adjustments, necessary for a fair statement of the financial position of InterDigital, Inc. (individually and/or collectively with its subsidiaries referred to as “InterDigital,” the “Company,” “we,” “us” or “our,” unless otherwise indicated) as of September 30, 2021, the results of our operations for the three and nine months ended September 30, 2021 and 2020 and our cash flows for the nine months ended September 30, 2021 and 2020. The accompanying unaudited, condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and, accordingly, do not include all of the detailed schedules, information and notes necessary to state fairly the financial condition, results of operations and cash flows in conformity with United States generally accepted accounting principles (“GAAP”). The year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by GAAP for year-end financial statements. Therefore, these financial statements should be read in conjunction with the financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020 (our “2020 Form 10-K”) as filed with the Securities and Exchange Commission (“SEC”) on February 18, 2021. Definitions of capitalized terms not defined herein appear within our 2020 Form 10-K. The results of operations for interim periods are not necessarily indicative of the results to be expected for the entire year. We have one reportable segment.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the date of the financial statements, as well as the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates.

InterDigital has analyzed the impact of the ongoing Coronavirus pandemic (“COVID-19”) on its financial statements as of September 30, 2021.  InterDigital has determined that the changes to its significant judgments and estimates as a result of COVID-19 did not have a material impact on its financial statements.  The potential impact of COVID-19 will continue to be analyzed going forward.

Change in Accounting Policies

There have been no material changes or updates to our existing accounting policies from the disclosures included in our 2020 Form 10-K, except as indicated below in "New Accounting Guidance".

Prior Periods' Financial Statement Revision

In connection with the preparation of the condensed consolidated financial statements as of and for the three months ended June 30, 2021, it was identified that we incorrectly classified certain tax receivables, representing approximately 1.5% of total assets as of December 31, 2020, as other current assets instead of non-current in the presentation of our consolidated balance sheet.

We assessed the materiality of this misstatement on prior periods’ financial statements in accordance with ASC Topic 250, Accounting Changes and Error Corrections, (“ASC 250”) and concluded it was not material to any prior annual or interim periods. In accordance with ASC 250, we have corrected our presentation of other current and non-current assets for prior periods presented in this Form 10-Q by revising the condensed consolidated financial statements and other consolidated financial information included herein. We will continue to present the prior periods on this revised basis to the extent we present such prior periods in future filings. Refer to Note 10, "Other Assets" for additional information on the revision.

Reclassifications

Certain reclassifications have been made to prior year amounts to conform to the current year presentation.

9

Supplemental Cash Flow Information

The following table presents additional supplemental cash flow information for the nine months ended September 30, 2021 and 2020 (in thousands):

	FOR THE NINE MONTHS ENDED SEPTEMBER 30,
SUPPLEMENTAL CASH FLOW INFORMATION:	2021		2020
Interest paid	$	4,000	$	4,712
Income taxes paid, including foreign withholding taxes	9,835		18,211
Non-cash investing and financing activities:
Dividend payable	10,740		10,782
Non-cash acquisition of patents	—		33,300
Accrued capitalized patent costs and property and equipment	3,690		(419)
Unsettled repurchase of common stock	499		—

New Accounting Guidance

Accounting Standards Update: Simplifying the Accounting for Income Taxes

In December 2019, the FASB issued ASU No. 2019-12, "Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes" ("ASU 2019-12"). The amendments in this ASU are intended to simplify various aspects related to accounting for income taxes. ASU 2019-12 removes certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve consistent application. ASU 2019-12 is effective for fiscal years beginning after December 15, 2020 with early adoption allowed. We adopted this guidance as of January 1, 2021 and the adoption did not have a material impact on our consolidated financial statements.

Accounting Standards Update: Simplifying the Accounting for Convertible Instruments

In August 2020, the FASB issued ASU No. 2020-06, “Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity” (“ASU 2020-06”). The amendments in this ASU are intended to simplify accounting for convertible debt instruments and convertible preferred stock by removing certain accounting models which separate the embedded conversion features from the host contract. ASU 2020-06 also amends certain guidance in ASC 260 on the computation of earnings per share for convertible instruments and contracts on an entity’s own equity. ASU 2020-06 is effective for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years, and early adoption is permitted for fiscal years beginning after December 15, 2020. This update permits the use of either the modified retrospective or fully retrospective methods of transition. We elected to early adopt this standard on a modified retrospective approach as of January 1, 2021.

This adoption increased long-term debt by $50.2 million at January 1, 2021, which was comprised of $51.6 million of unamortized interest discount and was partially offset by a net increase of $1.4 million equity component of deferred financing costs. This was due to the standard no longer requiring bifurcation of the embedded conversion feature from the host contract on the 2024 Notes, as defined in Note 7, "Obligations." This adoption also reduced non-cash interest expense starting in 2021 due to the removal of the accretion of the debt discount on the 2024 Notes.

Lastly, the adoption requires the use of the if-converted method of calculating diluted earnings per share rather than the treasury stock method for convertible instruments and requires the inclusion of the potential effect of shares settled in cash or shares in the diluted earnings per share calculation. Due to the reduction in non-cash interest expense, this adoption increased both basic and diluted earnings per share by $0.09 in the three months ended September 30, 2021 and $0.26 in the nine months ended September 30, 2021.

Accounting Standards Update: Issuer’s Accounting for Certain Modifications or Exchanges of Freestanding Equity Classified Written Call Options

In May 2021, the FASB issued ASU No. 2021-04. The amendments in this ASU are intended to clarify and reduce diversity in an issuer’s accounting for modifications or exchanges of freestanding equity-classified written call options, including warrants, that remain equity classified after modification or exchange. ASU 2021-04 is effective for fiscal years beginning after December 15, 2021, with early adoption allowed. The Company is currently evaluating the anticipated impact of the adoption of ASU 2021-04 on its consolidated financial statements.

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2. REVENUE

Disaggregated Revenue

The following table presents the disaggregation of our revenue for the three and nine months ended September 30, 2021 and 2020 (in thousands):

	Three months ended September 30,
	2021		2020		Increase/(Decrease)
Variable patent royalty revenue	$	8,346	$	7,377	$	969	13	%
Fixed-fee royalty revenue	84,295		77,338		6,957		9	%
Current patent royalties a	92,641		84,715		7,926		9	%
Non-current patent royalties b	50,108		507		49,601		9,783	%
Total patent royalties	142,749		85,222		57,527		68	%
Current technology solutions revenue a	747		2,271		(1,524)		(67)	%
Total revenue	$	143,496	$	87,493	$	56,003	64	%

	Nine months ended September 30,
	2021		2020		Increase/(Decrease)
Variable patent royalty revenue	$	22,765	$	17,920	$	4,845	27	%
Fixed-fee royalty revenue	222,887		221,023		1,864		1	%
Current patent royalties a	245,652		238,943		6,709		3	%
Non-current patent royalties b	63,475		20,461		43,014		210	%
Total patent royalties	309,127		259,404		49,723		19	%
Current technology solutions revenue a	4,467		8,797		(4,330)		(49)	%
Total revenue	$	313,594	$	268,201	$	45,393	17	%

a.    Recurring revenues are comprised of current patent royalties, inclusive of dynamic fixed-fee royalty payments, and current technology solutions revenue.

b.    Non-recurring revenues are comprised of non-current patent royalties, which include past patent royalties and royalties from static agreements, as well as patent sales.

During the nine months ended September 30, 2021, we recognized $186.9 million of revenue that had been included in deferred revenue as of the beginning of the period. As of September 30, 2021, we had contract assets of $20.5 million and $8.7 million included within "Accounts receivable" and "Other non-current assets, net" in the condensed consolidated balance sheet, respectively. As of December 31, 2020, we had contract assets of $9.7 million and $8.9 million included within "Accounts receivable" and "Other non-current assets, net" in the condensed consolidated balance sheet, respectively.

Contracted Revenue

Based on contracts signed and committed as of September 30, 2021, we expect to recognize the following revenue from dynamic fixed-fee royalty payments over the term of such contracts (in thousands):

	Revenue
Remainder 2021	$	89,541
2022	299,307
2023	104,469
2024	60,089
2025 and beyond	60,000
Total Revenue	$	613,406

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3. INCOME TAXES

In the nine months ended September 30, 2021 and 2020, the Company had an effective tax rate of 21.3% and (16.8)%, respectively. The effective tax rate in both periods was impacted by losses in certain jurisdictions where the Company presently has recorded a valuation allowance against the related tax benefit, as well as by the foreign-derived intangible income deduction and non-deductible compensation. Excluding this valuation allowance, our effective tax rate for the nine months ended September 30, 2021 and 2020 would have been 8.4% and (31.3)% respectively. During the nine months ended September 30, 2021 and 2020, the Company recorded a discrete net expense of $0.3 million and $18.2 million, respectively, primarily related to share-based compensation and the expected amendment of a prior year return to utilize a tax asset generated in the prior year. Due to the closing of the statute of limitations on certain tax years, the Company believes it is reasonably possible that it will have a reduction in the liability for unrecognized tax benefits of $1.1 million, excluding interest and penalties.

The effective tax rate reported in any given year will continue to be influenced by a variety of factors, including timing differences between the recognition of book and tax revenue, the level of pre-tax income or loss, the foreign vs. domestic classification of the Company’s customers, and any discrete items that may occur.

During the nine months ended September 30, 2021 and 2020, the Company paid approximately $8.9 million and $17.8 million, respectively, in foreign source creditable withholding tax.

4. NET INCOME PER SHARE

Basic Earnings Per Share ("EPS") is calculated by dividing net income or loss available to common shareholders by the weighted-average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if options or other securities with features that could result in the issuance of common stock were exercised or converted to common stock or resulting from the unvested outstanding RSUs. The following tables reconcile the numerator and the denominator of the basic and diluted net income per share computation (in thousands, except for per share data):

	Three months ended September 30,				Nine months ended September 30,
	2021		2020		2021		2020
Net income applicable to InterDigital, Inc.	$	26,228	$	23,784	$	33,417	$	46,151
Weighted-average shares outstanding:
Basic	30,737		30,804		30,792		30,762
Dilutive effect of stock options, RSUs, convertible securities and warrants	694		315		480		267
Diluted	31,431		31,119		31,272		31,029
Earnings per share:
Basic	$	0.85	$	0.77	$	1.09	$	1.50
Dilutive effect of stock options, RSUs, convertible securities and warrants	(0.02)		(0.01)		(0.02)		(0.01)
Diluted	$	0.83	$	0.76	$	1.07	$	1.49

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Shares of common stock issuable upon the exercise or conversion of certain securities have been excluded from our computation of EPS because the strike price or conversion rate, as applicable, of such securities was greater than the average market price of our common stock and, as a result, the effect of such exercise or conversion would have been anti-dilutive. Set forth below are the securities and the weighted average number of shares of common stock underlying such securities that were excluded from our computation of EPS for the periods presented (in thousands):

	Three months ended September 30,		Nine months ended September 30,
	2021	2020	2021	2020
Restricted stock units and stock options	441	156	289	154
Convertible securities(a)	—	4,921	—	5,222
Warrants	4,921	5,319	4,921	5,931
Total	5,362	10,396	5,210	11,307

______________________________

(a)As of December 31, 2020, we made the irrevocable election to settle all conversions of the 2024 Notes through combination settlements of cash and shares of our common stock, with a specified dollar amount of $1,000 per $1,000 principal amount of 2024 Notes and any remaining amounts in shares of our common stock.

Convertible Notes and Warrants

Refer to Note 7, "Obligations," for information about the Company's convertible notes and warrants and related conversion and strike prices. During periods in which the average market price of the Company's common stock is above the applicable conversion price of the Company's convertible notes, or above the strike price of the Company's outstanding warrants, the impact of conversion or exercise, as applicable, would be dilutive and such dilutive effect is reflected in diluted EPS. As a result, in periods where the average market price of the Company's common stock is above the conversion price or strike price, as applicable, under the if-converted method, the Company calculates the number of shares issuable under the terms of the convertible notes and the warrants based on the average market price of the stock during the period, and includes that number in the total diluted shares outstanding for the period.

5. LITIGATION AND LEGAL PROCEEDINGS

COURT PROCEEDINGS

Lenovo

UK Proceeding

On August 27, 2019, the Company and certain of its subsidiaries filed a claim in the UK High Court against Lenovo Group Limited and certain of its subsidiaries. The claim, as amended, alleges infringement of five of the Company's patents relating to 3G and/or 4G/LTE standards: European Patent (U.K.) Nos. 2,363,008; 2,421,318; 2,485,558; 2,557,714; and 3,355,537.

The UK High Court held case management conferences on October 6, 2020 and December 16, 2020, a disclosure hearing on January 19, 2021 and pre-trial review hearings for the first trial on January 28, 2021 and February 8, 2021. At those hearings, the UK High Court entered a schedule for the technical and non-technical FRAND proceedings. Two technical trials were scheduled for March 2021 and June 2021 and the non-technical FRAND trial is scheduled in January 2022. There are three additional technical trials scheduled for the remaining patents following the FRAND trial. The first and second technical trials were completed, and on July 29, 2021, the UK High Court issued its decision regarding the first technical trial finding European Patent (UK) No. 2 485 558 valid, infringed, and essential to Release 8 of LTE. The Company is awaiting the court’s decision regarding the merits of the second technical trial.

13

District of Delaware Patent Proceeding

On August 28, 2019, the Company and certain of its subsidiaries filed a complaint in the United States District Court for the District of Delaware (the "Delaware District Court") against Lenovo Holding Company, Inc. and certain of its subsidiaries alleging that Lenovo infringes eight of InterDigital's U.S. patents—U.S. Patent Nos. 8,085,665; 8,199,726; 8,427,954; 8,619,747; 8,675,612; 8,797,873; 9,203,580; and 9,456,449—by making, using, offering for sale, and/or selling Lenovo wireless devices with 3G and/or 4G LTE capabilities. As relief, InterDigital is seeking: (a) a declaration that InterDigital is not in breach of its relevant FRAND commitments with respect to Lenovo; (b) to the extent Lenovo does not agree to negotiate a worldwide patent license, does not agree to enter into binding international arbitration to set the terms of a FRAND license, and does not agree to be bound by the FRAND terms to be set by the UK High Court in the separately filed UK proceedings described above, an injunction prohibiting Lenovo from continued infringement; (c) damages, including enhanced damages for willful infringement and supplemental damages; and (d) attorneys’ fees and costs.

On September 16, 2020, the Delaware District Court entered a schedule for the case, setting a patent jury trial. On March 8, 2021, the Delaware District Court held a claim construction hearing, and the court issued its order on May 10, 2021 construing various disputed terms. On March 24, 2021, the Delaware District Court consolidated the antitrust proceeding discussed below with this patent proceeding. Trial for the consolidated proceedings is scheduled for December 5, 2022.

District of Delaware Antitrust Proceeding

On April 9, 2020, Lenovo (United States) Inc. and Motorola Mobility LLC filed a complaint in the Delaware District Court against the Company and certain of its subsidiaries. The complaint alleges that the Company defendants have violated Sections 1 and 2 of the Sherman Act in connection with, among other things, their licensing of 3G and 4G standards essential patents ("SEPs"). The complaint further alleges that the Company defendants have violated their commitment to the ETSI with respect to the licensing of 3G and 4G SEPs on FRAND terms and conditions. The complaint seeks, among other things (i) rulings that the Company defendants have violated Sections 1 and 2 of the Sherman Act and are liable for breach of their ETSI FRAND commitments, (ii) a judgment that the plaintiffs are entitled to a license with respect to the Company's 3G and 4G SEPs on FRAND terms and conditions, and (iii) injunctions against any demand for allegedly excessive royalties or enforcement of the Company defendants' 3G and 4G U.S. SEPs against the plaintiffs or their customers via patent infringement proceedings.

On June 22, 2020, the Company filed a motion to dismiss Lenovo's Sherman Act claims with prejudice, and to dismiss Lenovo's breach of contract claim with leave to re-file as a counterclaim in the Company's legal proceeding against Lenovo in the Delaware District Court discussed above. Oral argument on the Company's motion to dismiss was held on October 27, 2020.

On March 24, 2021, the Delaware District Court ruled on the Company’s motion to dismiss. The Delaware District Court dismissed the Sherman Act Section 1 claim without prejudice, denied the motion to dismiss the Sherman Act Section 2 claim, and consolidated the Section 2 and breach of contract claims with Company’s patent proceeding against Lenovo in the Delaware District Court discussed above.

China Proceeding

On April 10, 2020, Lenovo (Beijing) Ltd. and certain of its affiliates filed a complaint against the Company and certain of its subsidiaries in the Beijing Intellectual Property Court (Beijing IP Court) seeking a determination of the FRAND royalty rates payable for the Company's Chinese 3G, 4G and 5G SEPs. On February 20, 2021, the Company filed an application challenging the jurisdiction of the Beijing IP Court to take up Lenovo’s complaint. The jurisdictional challenge remains pending.

Xiaomi

As a result of the license agreement between the Company and a subsidiary of Xiaomi Corporation ("Xiaomi"), the parties have ceased all activity in each of the disputes described below and will be taking timely action to formally withdraw all claims.

China Proceeding

On August 5, 2020, Xiaomi informed the Company that certain of its affiliates filed a complaint in the Wuhan Intermediate People's Court (the "Wuhan Court") seeking a determination of a global FRAND rate for a license to the Company's 3G and/or 4G/LTE SEPs. The Company was informed that the Wuhan Court held an ex parte hearing on or about September 23, 2020 and issued an order that enjoins the Company from seeking an injunction against Xiaomi and certain of its subsidiaries for infringement of certain of the Company's 3G and/or 4G/LTE SEPs on threat of a fine of up to one million yuan per day for violating that order.

14

On September 30, 2020, the Company filed a response seeking reconsideration of the anti-suit injunction, which was denied. The Company challenged that decision at the Supreme People's Court of the People's Republic of China, but that challenge was also denied.

The Wuhan Court held two evidentiary hearings in April and June 2021. On July 29, 2021, the Wuhan Court held the first of multiple substantive hearings during which the parties presented their respective claims, defenses and evidence.

India Proceeding

On July 29, 2020, the Company and certain of its subsidiaries filed two patent infringement actions in the Delhi High Court (the "Delhi High Court") against Xiaomi and certain of its subsidiaries. The first complaint alleges infringement of five of the Company's patents related to 3G and/or 4G/LTE standards: Indian Patent Nos. 262910; 295912; 298719; 313036; and 320182. The second complaint alleges infringement of three of the Company's patents related to H.265/HEVC standards: Indian Patent Nos. 242248; 299448; and 308108.

On September 29, 2020, the Company filed an anti-anti-suit injunction application against Xiaomi in the Delhi High Court seeking to enjoin Xiaomi from enforcing the Wuhan Court's anti-suit injunction order described above. On October 9, 2020, the Delhi High Court granted the Company's motion and issued an ad interim injunction. On May 3, 2021, the interim anti-anti-suit injunction was made permanent for the duration of the Indian cellular case.

On June 4, 2021, Xiaomi filed responses to the two complaints (cellular and H.265/HEVC), which included counterclaims seeking invalidation of the patents in the respective suits. The Company filed its replies on July 5, 2021.

German Proceeding

On October 30, 2020, the Company filed an anti-anti-suit injunction application against Xiaomi in the Munich District Court, seeking to enjoin Xiaomi from pursuing the Wuhan Court's anti-suit injunction order described above with respect to Germany. On November 11, 2020, the Munich District Court granted the Company's motion and issued an ex parte injunction restraining Xiaomi from enforcing the anti-suit injunction. Xiaomi opposed the injunction and requested a stay of enforcement. On January 28, 2021, the Munich District Court dismissed the request for stay of enforcement. On February 25, 2021 the Munich District Court confirmed its earlier ex parte anti-anti-suit injunction against Xiaomi. Xiaomi appealed the decision to the Higher Regional Court Munich.

On April 27, 2021, the Company was informed that the Munich Regional Court commenced service of three patent infringement actions filed against Xiaomi and certain of its subsidiaries by a subsidiary of the Company. The complaints involve infringement of the Company's German 3G and/or 4G/LTE patents (Patent Nos. EP 2,421,318; EP 2,485,558; and EP 3,355,537).

OTHER

We are party to certain other disputes and legal actions in the ordinary course of business, including legal proceedings with licensees regarding the terms of their agreements and the negotiation thereof. We do not currently believe that these matters, even if adversely adjudicated or settled, would have a material adverse effect on our financial condition, results of operations or cash flows. None of the preceding matters have met the requirements for accrual or disclosure of a potential range as of September 30, 2021.

6. CASH, CONCENTRATION OF CREDIT RISK AND FAIR VALUE OF FINANCIAL INSTRUMENTS

Cash, Cash Equivalents and Restricted Cash

Cash, cash equivalents and restricted cash currently consists of money market and demand accounts. The following table provides a reconciliation of total cash, cash equivalents and restricted cash as of September 30, 2021, December 31, 2020 and September 30, 2020 to the captions within the condensed consolidated balance sheets and condensed consolidated statements of cash flows (in thousands):

	September 30,		December 31,		September 30,
	2021		2020		2020
Cash and cash equivalents	$	467,606	$	473,474	$	746,561
Restricted cash included within prepaid and other current assets	1,300		3,108		4,401
Restricted cash included within other non-current assets	1,081		1,081		1,081
Total cash, cash equivalents and restricted cash	$	469,987	$	477,663	$	752,043

15

Concentration of Credit Risk and Fair Value of Financial Instruments

Financial instruments that potentially subject us to concentration of credit risk consist primarily of cash equivalents, short-term investments, and accounts receivable. We place our cash equivalents and short-term investments only in highly rated financial instruments and in United States government instruments.

Our accounts receivable and contract assets are derived principally from patent license and technology solutions agreements. As of September 30, 2021 two licensees comprised 93% and as of December 31, 2020 five licensees comprised 53%, respectively, of our net accounts receivable balance. We perform ongoing credit evaluations of our licensees, who generally include large, multinational, wireless telecommunications equipment manufacturers. We believe that the book values of our financial instruments approximate their fair values.

Fair Value Measurements

We use various valuation techniques and assumptions when measuring the fair value of our assets and liabilities. We utilize market data or assumptions that market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. This guidance established a hierarchy that prioritizes fair value measurements based on the types of input used for the various valuation techniques (market approach, income approach and cost approach). The levels of the hierarchy are described below:

Level 1 Inputs — Level 1 includes financial instruments for which quoted market prices for identical instruments are available in active markets.

Level 2 Inputs — Level 2 includes financial instruments for which there are inputs other than quoted prices included within Level 1 that are observable for the instrument such as quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets with insufficient volume or infrequent transactions (less active markets) or model-driven valuations in which significant inputs are observable or can be derived principally from, or corroborated by, observable market data, including market interest rate curves, referenced credit spreads and pre-payment rates.

Level 3 Inputs — Level 3 includes financial instruments for which fair value is derived from valuation techniques including pricing models and discounted cash flow models in which one or more significant inputs are unobservable, including the Company’s own assumptions. The pricing models incorporate transaction details such as contractual terms, maturity and, in certain instances, timing and amount of future cash flows, as well as assumptions related to liquidity and credit valuation adjustments of marketplace participants.

Our assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of financial assets and financial liabilities and their placement within the fair value hierarchy. We use quoted market prices for similar assets to estimate the fair value of our Level 2 investments.

Recurring Fair Value Measurements

Our financial assets are generally included within short-term investments on our condensed consolidated balance sheets, unless otherwise indicated. Our financial assets and liabilities that are accounted for at fair value on a recurring basis are presented in the tables below as of September 30, 2021 and December 31, 2020 (in thousands):

	Fair Value as of September 30, 2021
	Level 1		Level 2		Level 3		Total
Assets:
Money market and demand accounts (a)	$	469,987	$	—	$	—	$	469,987
Commercial paper (b)	—		254,688		—		254,688
U.S. government securities	—		129,017		—		129,017
Corporate bonds, asset backed and other securities	—		49,495		—		49,495
Total	$	469,987	$	433,200	$	—	$	903,187

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	Fair Value as of December 31, 2020
	Level 1		Level 2		Level 3		Total
Assets:
Money market and demand accounts (a)	$	397,522	$	—	$	—	$	397,522
Commercial paper(b)	—		285,242		—		285,242
U.S. government securities	—		166,223		—		166,223
Corporate bonds, asset backed and other securities	—		81,849		—		81,849
Total	$	397,522	$	533,314	$	—	$	930,836

______________________________

(a)Primarily included within cash and cash equivalents.

(b)As of September 30, 2021 and December 31, 2020, $0.0 million and $80.1 million, respectively, of commercial paper was included within cash and cash equivalents.

Non-Recurring Fair Value Measurements

Investments in Other Entities

During second quarter 2021, we recognized a $1.0 million unrealized gain resulting from observable price changes of one of our long-term strategic investments, which was included within “Other (expense) income, net” in the condensed consolidated statement of income.

During first quarter 2020, we recognized a $5.5 million unrealized gain resulting from observable price changes of one of our long-term strategic investments, which was included within “Other (expense) income, net” in the condensed consolidated statement of income.

Lease Assets

During first quarter 2020, we recognized a $1.1 million impairment, comprised of $0.8 million of Property, Plant, and Equipment, and $0.3 million of Right of Use Asset related to the abandonment of one of our leased properties, which was included within “Operating Expenses” in the condensed consolidated statement of income.

Patents

During second quarter 2021, Convida approved a plan to sell certain patent assets, which were classified as held-for sale. This resulted in an impairment of $11.0 million and was included within restructuring activities as more fully discussed below. The patents held for sale are recorded at fair value on September 30, 2021 and are included within "Prepaid and other current assets" in the condensed consolidated balance sheet.

Fair Value of Long-Term Debt

2024 Notes

The principal amount, carrying value and related estimated fair value of the Company's senior convertible debt reported in the condensed consolidated balance sheets as of September 30, 2021 and December 31, 2020 was as follows (in thousands). The aggregate fair value of the principal amount of the senior convertible long-term debt is a Level 2 fair value measurement.

	September 30, 2021						December 31, 2020
	Principal Amount		Carrying Value		Fair Value		Principal Amount		Carrying Value		Fair Value
Senior Convertible Long-Term Debt	$	400,000	$	395,217	$	432,000	$	400,000	$	343,821	$	418,760

Technicolor Patent Acquisition Long-term Debt

The carrying value and related estimated fair value of the Technicolor Patent Acquisition long-term debt reported in the condensed consolidated balance sheets as of September 30, 2021 and December 31, 2020 was as follows (in thousands). The aggregate fair value of the Technicolor Patent Acquisition long-term debt is a Level 3 fair value measurement.

	September 30, 2021				December 31, 2020
	Carrying Value		Fair Value		Carrying Value		Fair Value
Technicolor Patent Acquisition Long-Term Debt	$	26,203	$	33,192	$	24,171	$	27,016

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7. OBLIGATIONS

Technicolor Patent Acquisition Long-Term Debt

On July 30, 2018, we completed our acquisition of the patent licensing business of Technicolor SA ("Technicolor"), a worldwide technology leader in the media and entertainment sector (the "Technicolor Patent Acquisition"). In conjunction with the Technicolor Patent Acquisition we assumed Technicolor’s rights and obligations under a joint licensing program with Sony Corporation ("Sony") relating to digital televisions and standalone computer display monitors, which commenced in 2015 and is referred to as the "Madison Arrangement." An affiliate of CPPIB Credit Investments Inc. ("CPPIB Credit"), a wholly owned subsidiary of Canada Pension Plan Investment Board, is a third-party investor in the Madison Arrangement. CPPIB Credit has made certain payments to Technicolor and Sony and has agreed to contribute cash to fund certain capital reserve obligations under the arrangement in exchange for a percentage of future revenues, specifically through September 11, 2030 in regard to the Technicolor patents.

Upon our assumption of Technicolor’s rights and obligations under the Madison Arrangement, our relationship with CPPIB Credit meets the criteria in ASC 470-10-25 - Sales of Future Revenues or Various Other Measures of Income ("ASC 470"), which relates to cash received from an investor in exchange for a specified percentage or amount of revenue or other measure of income of a particular product line, business segment, trademark, patent, or contractual right for a defined period. Under this guidance, we recognized the fair value of our contingent obligation to CPPIB Credit, as of the acquisition date, as long-term debt in our condensed consolidated balance sheet. This initial fair value measurement was based on the perspective of a market participant and included significant unobservable inputs which are classified as Level 3 inputs within the fair value hierarchy. The fair value of the long-term debt as of September 30, 2021 and December 31, 2020 is disclosed within Note 6, "Cash, Concentration of Credit Risk and Fair Value of Financial Instruments." Our repayment obligations are contingent upon future royalty revenues generated from the Madison Arrangement and there are no minimum or maximum payments under the arrangement.

Under ASC 470, amounts recorded as debt are amortized under the interest method. At each reporting period, we will review the discounted expected future cash flows over the life of the obligation. The Company made an accounting policy election to utilize the catch-up method when there is a change in the estimated future cash flows, whereby we will adjust the carrying amount of the debt to the present value of the revised estimated future cash flows, discounted at the original effective interest rate, with a corresponding adjustment recognized as interest expense within “Interest Expense” in the condensed consolidated statements of income. The effective interest rate as of the acquisition date was approximately 14.5%. This rate represents the discount rate that equates the estimated future cash flows with the fair value of the debt as of the acquisition date, and is used to compute the amount of interest to be recognized each period based on the estimated life of the future revenue streams. During the three and nine months ended September 30, 2021, we recognized $0.4 million and $2.0 million, respectively, of interest expense related to this debt, compared to $0.8 million and $2.3 million during the three and nine months ended September 30, 2020, respectively. This was included within “Interest Expense” in the condensed consolidated statements of income. Any future payments made to CPPIB Credit, or additional proceeds received from CPPIB Credit, will decrease or increase the long-term debt balance accordingly.

2024 Notes, and Related Note Hedge and Warrant Transactions

On June 3, 2019, we issued $400.0 million in aggregate principal amount of 2.00% Senior Convertible Notes due 2024 (the "2024 Notes"). The net proceeds from the issuance of the 2024 Notes, after deducting the initial purchasers' transaction fees and offering expenses, were approximately $391.6 million. The 2024 Notes (i) bear interest at a rate of 2.00% per year, payable in cash on June 1 and December 1 of each year, commencing on December 1, 2019, and (ii) mature on June 1, 2024, unless earlier converted or repurchased. The effective interest rate of the 2024 Notes is 2.02%.

The 2024 Notes are convertible into cash, shares of our common stock or a combination thereof, at our election, at an initial conversion rate of 12.3018 shares of our common stock per $1,000 principal amount of 2024 Notes (which is equivalent to an initial conversion price of approximately $81.29 per share), as adjusted pursuant to the terms of the indenture governing the 2024 Notes (the "Indenture"). The conversion rate of the 2024 Notes, and thus the conversion price, may be adjusted in certain circumstances, including in connection with a conversion of the 2024 Notes made following certain fundamental changes and under other circumstances set forth in the Indenture. As of December 31, 2020, we made the irrevocable election to settle all conversions of the 2024 Notes through combination settlements of cash and shares of our common stock, with a specified dollar amount of $1,000 per $1,000 principal amount of 2024 Notes and any remaining amounts in shares of our common stock.

The 2024 Notes are senior unsecured obligations of the Company and rank equally in right of payment with any of our current and any future senior unsecured indebtedness. The 2024 Notes are effectively subordinated to all of our future secured indebtedness to the extent of the value of the related collateral, and the 2024 Notes are structurally subordinated to indebtedness and other liabilities, including trade payables, of our subsidiaries.

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On May 29 and May 31, 2019, in connection with the offering of the 2024 Notes, we entered into convertible note hedge transactions (collectively, the "2024 Note Hedge Transactions") that cover, subject to customary anti-dilution adjustments, approximately 4.9 million shares of common stock, in the aggregate, at a strike price that initially corresponds to the initial conversion price of the 2024 Notes, subject to adjustment, and are exercisable upon any conversion of the 2024 Notes. On May 29 and May 31, 2019, we also entered into privately negotiated warrant transactions (collectively, the "2024 Warrant Transactions" and, together with the 2024 Note Hedge Transactions, the "2024 Call Spread Transactions"), whereby we sold warrants to acquire, subject to customary anti-dilution adjustments, approximately 4.9 million shares of common stock at an initial strike price of approximately $109.43 per share, subject to adjustment.

There have been no material changes regarding the 2024 Notes and 2024 Call Spread Transactions from the disclosures included in Note 10, "Obligations" within the notes to the consolidated financial statements included in Part II, Item 8 of the 2020 Form 10-K.

2020 Notes

On March 11, 2015, we issued $316.0 million in aggregate principal amount of 1.50% Senior Convertible Notes due 2020 (the "2020 Notes"). The 2020 Notes bore interest at a rate of 1.50% per year and matured on March 1, 2020. On the maturity date, the outstanding balance of $94.9 million under the 2020 Notes was repaid in full.

The following table reflects the carrying value of our convertible notes long-term debt as of September 30, 2021 and December 31, 2020 (in thousands):

	September 30, 2021		December 31, 2020
Principal	$	400,000	$	400,000
Less:
Unamortized interest discount(a)	—		(51,567)
Deferred financing costs(a)	(4,783)		(4,612)
Net carrying amount of the 2024 Notes	$	395,217	$	343,821

______________________________

(a)Due to the adoption of ASU 2020-06 on January 1, 2021, the unamortized interest discount was reclassified back to the carrying value of the 2024 Notes. Refer to Note 1, "Basis of Presentation", for further information regarding this adoption.

The following table presents the amount of interest cost recognized, which is included within "Interest Expense" in our condensed consolidated statements of income, for the three and nine months ended September 30, 2021 and 2020 relating to the contractual interest coupon, accretion of the debt discount, and the amortization of deferred financing costs of the 2024 Notes and 2020 Notes (in thousands):

	Three months ended September 30,
	2021		2020
	2024 Notes		2024 Notes		2020 Notes		Total
Contractual coupon interest	$	2,000	$	2,000	$	—	$	2,000
Accretion of debt discount(a)	—		3,323		—		3,323
Amortization of deferred financing costs	411		297		—		297
Total	$	2,411	$	5,620	$	—	$	5,620

	Nine months ended September 30,
	2021		2020
	2024 Notes		2024 Notes		2020 Notes		Total
Contractual coupon interest	$	6,000	$	6,000	$	237	$	6,237
Accretion of debt discount(a)	—		9,800		669		10,469
Amortization of deferred financing costs	1,211		876		70		946
Total	$	7,211	$	16,676	$	976	$	17,652

______________________________

(a)Due to the adoption of ASU 2020-06, there is no longer accretion of the debt discount starting January 1, 2021. Refer to Note 1, "Basis of Presentation", for further information regarding this adoption.

19

Technicolor Contingent Consideration

As part of the Technicolor Patent Acquisition, we entered into a revenue-sharing arrangement with Technicolor that created a contingent consideration liability. Under the revenue-sharing arrangement, Technicolor receives 42.5% of future cash receipts from new licensing efforts from the Madison Arrangement only, subject to certain conditions and hurdles. As of September 30, 2021, the contingent consideration liability from the revenue-sharing arrangement was deemed not probable and is therefore not reflected within the consolidated financial statements.

8. VARIABLE INTEREST ENTITIES

As further discussed below, we are the primary beneficiary of three variable interest entities. As of September 30, 2021, the combined book values of the assets and liabilities associated with these variable interest entities included in our condensed consolidated balance sheet were $37.6 million and $2.9 million, respectively. Assets included $13.3 million of cash and cash equivalents, $6.4 million of accounts receivable and prepaid and other current assets, and $17.9 million of patents, net. As of December 31, 2020, the combined book values of the assets and liabilities associated with these variable interest entities included in our condensed consolidated balance sheet were $62.0 million and $5.8 million, respectively. Assets included $24.5 million of cash and cash equivalents, $2.3 million of accounts receivable and prepaid and other current assets, and $35.2 million of patents, net.

Chordant

On January 31, 2019, we launched the Company’s Chordant™ business as a standalone company. The spinout of the unit, which includes an affiliate of Sony as an investor along with the Company, gave Chordant added independence and flexibility in driving into its core operator and smart city markets. Chordant is a variable interest entity and we have determined that we are the primary beneficiary for accounting purposes and consolidate Chordant.  For the three and nine months ended September 30, 2021, we have allocated approximately $0.0 million and $2.3 million, respectively, of Chordant's net loss to noncontrolling interests held by other parties, and for the three and nine months September 30, 2020, we allocated $0.4 million and $0.9 million, respectively, of Chordant's net loss to noncontrolling interests held by other parties. During second quarter 2021, Chordant began the process of ceasing operations.

Convida Wireless

Convida Wireless was launched in 2013 and most recently renewed in 2018 to combine Sony's consumer electronics expertise with our pioneering IoT expertise to drive IoT communications and connectivity.  Based on the terms of the agreement, the parties contribute funding and resources for additional research and platform development, which we will perform.  SCP IP Investment LLC, an affiliate of Stephens Inc., is a minority investor in Convida Wireless.

Convida Wireless is a variable interest entity. Based on our provision of research and platform development services to Convida Wireless, we have determined that we remain the primary beneficiary for accounting purposes and will continue to consolidate Convida Wireless.  For the three and nine months ended September 30, 2021, we allocated $1.0 million and $8.7 million, respectively, of Convida Wireless's net loss to noncontrolling interests held by other parties and for the three and nine months ended September 30, 2020, we allocated $1.5 million and $4.4 million, respectively.

During second quarter 2021, Convida approved a plan to sell certain patent assets, which were classified as held-for sale. This resulted in an impairment of $11.0 million and was included within restructuring activities as more fully discussed below. The patents held for sale are recorded at fair value on September 30, 2021 and are included within "Prepaid and other current assets" in the condensed consolidated balance sheet.

Signal Trust for Wireless Innovation

During 2013, we announced the establishment of the Signal Trust for Wireless Innovation (the “Trust”), the goal of which was to monetize a patent portfolio primarily related to 3G cellular infrastructure. In response to a request from the Trust, in first quarter 2021 we provided our consent, as major beneficiary, to dissolve the Trust.

The Trust has been accounted for as a variable interest entity. Based on the terms of the trust agreement, we determined that we are the primary beneficiary for accounting purposes and have included the Trust in our consolidated financial statements. Pending the dissolution of the Trust, we will continue to consolidate the Trust in our consolidated financial statements.

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9. OTHER (EXPENSE) INCOME, NET

The amounts included in "Other (expense) income, net" in the condensed consolidated statements of income for the three and nine months ended September 30, 2021 and 2020 were as follows (in thousands):

	Three months ended September 30,				Nine months ended September 30,
	2021		2020		2021		2020
Interest and investment income	$	385	$	825	$	1,384	$	5,044
Other	(1,922)		3,169		842		8,762
Other (expense) income, net	$	(1,537)	$	3,994	$	2,226	$	13,806

Interest and investment income decreased in both the three and nine months ended September 30, 2021, due to reduced rates of return on our short-term investments. Other decreased in the three months ended September 30, 2021, compared to the three months ended September 30, 2020 primarily due to a foreign currency translation loss in the three months ended September 30, 2021, compared to a gain in three months ended September 30, 2020 arising from euro translation of our foreign subsidiaries. The decrease in other in the nine months ended September 30, 2021, compared to the nine months ended September 30, 2020 was primarily driven by a decrease in gains resulting from observable price changes of our long-term strategic investments, which were $5.5 million during the nine months ended September 30, 2020 and $1.0 million during the nine months ended September 30, 2021. This decrease was partially offset by a $1.9 million gain on a contract termination in first quarter 2021.

10.    OTHER ASSETS

The amounts included in "Prepaid and other current assets" in the consolidated balance sheet as of September 30, 2021 and December 31, 2020 were as follows (in thousands):

			As Reported		As Revised (a)
	September 30, 2021		December 31, 2020		December 31, 2020
Tax receivables	$	49,734	$	69,592	$	45,262
Prepaid assets	8,520		10,899		10,899
Patents held for sale	6,228		—		—
Receivable from sale of long-term investments	3,016		—		—
Operating lease receivable	64		817		817
Other current assets	12,742		2,916		2,916
Total Prepaid and other current assets	$	80,304	$	84,224	$	59,894

The amounts included in "Other non-current assets, net" in the consolidated balance sheet as of September 30, 2021 and December 31, 2020 were as follows (in thousands):

			As Reported		As Revised (a)
	September 30, 2021		December 31, 2020		December 31, 2020
Tax receivables	$	29,969	$	—	$	24,330
Goodwill	22,421		22,421		22,421
Right-of-use assets	18,871		22,456		22,456
Long-term investments	14,580		15,489		15,489
Other non-current assets	11,115		13,677		13,677
Total Other non-current assets, net	$	96,956	$	74,043	$	98,373

_____________________________

(a)As discussed in Note 1, we revised our prior period presentation of "Prepaid and other current assets" and "Other non-current assets, net". This column represents the effect of the revision on the consolidated balance sheet.

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11.    RESTRUCTURING ACTIVITIES

During second quarter 2021, the Company began the process of a strategic review and undertook certain actions in order to increase focus on core technologies and markets.

On June 10, 2021, the Company announced that, as a result of a strategic review of its research and innovation priorities, it commenced the process of a collective economic layoff in which it proposed a reduction in force of 66 positions in its research and innovation unit, 60 of which are based in France. The Company launched an information-consultation process with respect to the contemplated reorganization with the works council of certain of its French subsidiaries, as required by French law. On September 28, 2021, the Company finalized an agreement with the representative trade unions of certain of its French subsidiaries to commence the reorganization of the research and innovation unit located in France as part of the reduction in force. This agreement was validated by the Regional Director of Economy, Employment, Labor and Solidarity on October 25, 2021. The majority of termination notices will be issued during the remainder of 2021.

During June 2021, Chordant began the process of ceasing operations. The Company implemented a reduction in workforce action in second quarter 2021, consisting of 18 employees.

Additionally, in June 2021, Convida approved a plan to sell certain patents. The proceeds from the sale of these patents will contribute to funding Convida's operations. These assets were evaluated as a separate asset group and reclassified as assets held for sale. Upon the reclassification, the patents to be sold are recorded at fair value, which resulted in the Company recognizing an $11.0 million impairment during the three months ended June 30, 2021. We determined the fair value based upon evaluation of market conditions. The patents held for sale are included within "Prepaid and other current assets" in the consolidated balance sheet.

Restructuring charges are estimated based on information available at the time such charges are recorded. Due to the inherent uncertainty involved in estimating restructuring expenses, actual amounts incurred for such activities may differ from amounts initially estimated. The Company may also incur additional costs not currently contemplated due to events that may occur as a result of, or that are associated with, the reduction in force or other restructuring activities.

The restructuring charges associated with the above activities totaling $7.0 million and $20.3 million in the three and nine months ended September 30, 2021, respectively, are presented net of any reimbursement arrangements and include $0.1 million and $1.2 million of outside services and other associated costs related to non-recurring consultant and legal fees in the three and nine months ended September 30, 2021. We expect additional charges to be recorded in fourth quarter 2021.

As of September 30, 2021, the Company's restructuring liability was $17.8 million, of which $6.9 million was included in "Other accrued expenses" and $10.9 million was included in "Other long-term liabilities" on our condensed consolidated balance sheet. The following table presents the change in our restructuring liability during the period (in thousands):

Balance as of March 31, 2021	$	—
Accrual	12,285
Cash payments	(628)
Balance as of June 30, 2021	$	11,657
Accrual	7,033
Cash payments	(859)
Balance as of September 30, 2021	$	17,831

The restructuring expenses included in "Restructuring activities" in the condensed consolidated statements of income for the three and nine months ended September 30, 2021 were as follows (in thousands):

	Three months ended September 30, 2021		Nine months ended September 30, 2021
Patent impairment	$	—	$	11,000
Severance and other benefits	6,998		18,084
Outside services and other associated costs	47		1,246
Reimbursement arrangements	—		(10,040)
Total	$	7,045	$	20,290

22

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS.

OVERVIEW

The following discussion should be read in conjunction with the unaudited, condensed consolidated financial statements and notes thereto contained in Part I, Item 1 of this Quarterly Report on Form 10-Q, in addition to our 2020 Form 10-K, other reports filed with the SEC and the Statement Pursuant to the Private Securities Litigation Reform Act of 1995 — Forward-Looking Statements below.

Throughout the following discussion and elsewhere in this Form 10-Q, we refer to “recurring revenues” and “non-recurring revenues.”  Recurring revenues are comprised of “current patent royalties” and “current technology solutions revenue.”  Non-recurring revenues are comprised of “non-current patent royalties,” which include past patent royalties and royalties from static agreements, as well as “patent sales.”

New Agreements

On August 3, 2021, we announced that we have entered into a multi-year, worldwide, non-exclusive, royalty bearing license with a subsidiary of Xiaomi. The license covers Xiaomi’s cellular-enabled mobile devices under our standard essential patents related to cellular wireless (including 3G, 4G and 5G), WiFi and HEVC video technology. As part of the agreement, we and Xiaomi have agreed to terminate all pending patent litigation and other proceedings between the companies. During third quarter 2021, we recognized a total of $45.0 million of revenue associated with the Xiaomi patent license agreement, including $30.0 million of non-recurring revenue.

During third quarter 2021, as part of the Madison Arrangement, we entered into a non-exclusive, per-unit royalty-bearing patent license agreement with a top ten global TV manufacturer, covering certain of the licensee’s sales of digital televisions. During third quarter 2021, we recognized a total of $20.9 million of revenue associated with the patent license agreement, including $19.2 million of non-recurring revenue.

Recurring Revenue

Third quarter 2021 recurring revenue was $93.4 million, compared to recurring revenue of $87.0 million in third quarter 2020, a 7% year-over-year increase. The increase in recurring revenue was primarily due to additional revenues from ten new patent license agreements signed in the last twelve months, including the Xiaomi and top ten global TV manufacturer patent license agreements signed in third quarter 2021, partially offset by a reduction in revenues resulting from LG's decision to exit the handset business. Refer to "Results of Operations --Third Quarter 2021 Compared to Third Quarter 2020" for further discussion of our 2021 revenue.

Restructuring Activities

On June 10, 2021, we announced that, as a result of a strategic review of our research and innovation priorities, we commenced the process of a collective economic layoff in which we proposed a reduction in force of 66 positions in our research and innovation unit, 60 of whom are based in France. We launched an information-consultation process with respect to the contemplated reorganization with the works council of certain of our French subsidiaries, as required by French law. On September 28, 2021, the Company finalized an agreement with the representative trade unions of certain of its French subsidiaries to commence the reorganization of the research and innovation unit located in France as part of the reduction in force announced in June. This agreement was validated by the Regional Director of Economy, Employment, Labor and Solidarity on October 25, 2021. The majority of termination notices will be issued during the remainder of 2021.

During third quarter 2021, we recognized $7.0 million of restructuring expenses including $6.9 million of severance and other benefits and $0.1 million of outside services and other associated costs which are included within “Restructuring Activities” in the condensed consolidated statement of income.

In October 2021, we expanded our restructuring efforts to include general and administrative functions largely centered in the U.S., which will result in a further reduction in force of approximately 8% of total headcount as well as cuts to our non-labor expenses.

We expect to recognize additional restructuring charges of $5 million to $6 million in fourth quarter 2021. Previously, we disclosed that our initial restructuring efforts would drive annualized recurring expense savings of approximately $15 million. While the expanded actions will increase these savings, we have begun to reinvest in our research activities in wireless, video, and other fundamental technologies and will continue to evaluate the extent of re-investment through the end of the year.

23

Impact of COVID-19 Pandemic

In March 2020, the World Health Organization categorized the novel coronavirus ("COVID-19") as a pandemic, and it continues to significantly impact the United States and the rest of the world. Though the COVID-19 pandemic and the measures taken to reduce its transmission, such as the imposition of social distancing and orders to work-from-home and shelter-in-place, have altered our business environment and overall working conditions, we continue to believe that our strategic strengths, including talent, our strong balance sheet, stable revenue base, and the strength of our patent portfolio, will allow us to weather a rapidly changing marketplace.

While the environment in which we conduct our business and our overall working conditions have changed as a result of the COVID-19 pandemic, we experienced a limited impact on our operations and financial position during three months ended September 30, 2021. As discussed in our 2020 Form 10-K, fixed-fee royalties accounted for nearly 89% of our revenues in 2020. To that end, in the nine months ended September 30, 2021, we did not experience a significant impact on our revenue due to COVID-19. Meanwhile, we have taken steps to protect the health and safety of our employees and their families, with our entire worldwide workforce continuing to work remotely with limited exceptions. We are currently planning for a return to in-person work as early as January 2022, however we continue to evaluate feasibility of this date based on the evolving environment and regulatory guidance. All of our locations are open on a limited and voluntary basis. Despite the remote working conditions, our business activities have continued to operate with minimal interruption, and we expect them to continue to operate efficiently. Although we have resumed work-related travel on a limited basis, we have conducted the majority of our licensing negotiations, investor presentations and participation in standards organizations and industry events virtually. Between March 12, 2020, when we began to work almost entirely remotely, and September 30, 2021, we successfully concluded thirteen new patent license agreements that we estimate will result in aggregate revenues exceeding $500.0 million over the terms of those agreements. Our financial position remains strong, we believe we have sufficient access to capital if needed, and we remain committed to our efforts around cost discipline.

Despite our success thus far in navigating the challenging environment that COVID-19 has presented, as more fully discussed in Part II, Item 1A "Risk Factors" in this Quarterly Report on Form 10-Q, the extent to which COVID-19 will adversely impact our business, financial condition and results of operations is dependent upon numerous factors resulting therefrom, many of which are highly uncertain, rapidly changing and uncontrollable. However, with a strong balance sheet and the vast majority of our current revenue coming from fixed price agreements, we believe that we are well-positioned to continue to overcome and adapt to the challenges that we have been presented with thus far.

Share Repurchase Program

During third quarter 2021, we repurchased 0.2 million shares for $11.9 million under our share repurchase program (the "2014 Repurchase Program"). As of September 30, 2021, there was approximately $48.5 million remaining under the stock repurchase authorization. Year-to-date through November 3, 2021, we repurchased 0.5 million shares for $30.0 million under the 2014 Repurchase Program.

Comparability of Financial Results

When comparing third quarter 2021 financial results against other periods, the following items should be taken into consideration:

•Our third quarter 2021 revenue includes $50.1 million of non-recurring revenue primarily related to the patent license agreements with Xiaomi and a top ten global TV manufacturer signed in third quarter 2021.

•During third quarter 2021, we incurred $11.1 million of one-time supplemental compensation costs driven by licensing success.

•During third quarter 2021, we recognized $7.0 million of restructuring expenses. These costs resulted from our restructuring activities as described in Note 11, "Restructuring Activities", within the notes to condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q, and are included within “Restructuring activities” expenses in the condensed consolidated statement of income.

•Interest expense decreased in third quarter 2021 by $4.6 million primarily due to a reduction in non-cash interest expense resulting from the accounting adoption of ASU 2020-06, related to the accounting for convertible debt.

24

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

Our significant accounting policies are described in Note 2, "Summary of Significant Accounting Policies and New Accounting Guidance", in the notes to consolidated financial statements included in our 2020 Form 10-K. A discussion of our critical accounting policies, and the estimates related to them, are included in Management’s Discussion and Analysis of Financial Condition and Results of Operations in our 2020 Form 10-K. There have been no material changes to our existing critical accounting policies from the disclosures included in our 2020 Form 10-K. In addition, we have analyzed the impact of COVID-19 on our financial statements as of September 30, 2021, and we have determined that the changes to our significant judgments and estimates did not have a material impact on our financial statements. Refer to Note 1, “Basis of Presentation,” in the notes to condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q for updates related to new accounting pronouncements and changes in accounting policies.

FINANCIAL POSITION, LIQUIDITY AND CAPITAL RESOURCES

Our primary sources of liquidity are cash, cash equivalents and short-term investments, as well as cash generated from operations. We believe we have the ability to obtain additional liquidity through debt and equity financings. Based on our past performance and current expectations, we believe our available sources of funds, including cash, cash equivalents and short-term investments and cash generated from our operations, will be sufficient to finance our operations, capital requirements, debt obligations, existing share repurchase program and dividend program for the next twelve months.

Cash, cash equivalents, restricted cash and short-term investments

As of September 30, 2021 and December 31, 2020, we had the following amounts of cash, cash equivalents, restricted cash and short-term investments (in thousands):

	September 30, 2021		December 31, 2020		Increase / (Decrease)
Cash and cash equivalents	$	467,606	$	473,474	$	(5,868)
Restricted cash included within prepaid and other current assets	1,300		3,108		(1,808)
Restricted cash included within other non-current assets	1,081		1,081		—
Short-term investments	433,200		453,173		(19,973)
Total cash, cash equivalents, restricted cash and short-term investments	$	903,187	$	930,836	$	(27,649)

The net decrease in cash, cash equivalents, restricted cash and short-term investments was attributable to cash used in financing activities of $54.3 million, primarily related to dividend payments and repurchases of common stock and cash used in investing activities of $31.1 million, excluding sales and purchases of short-term investments, offset by cash provided by operating activities of $59.2 million. Refer to the sections below for further discussion of these items.

Cash flows from operating activities

We generated the following cash flows from operating activities in the first nine months 2021 and 2020 (in thousands):

	Nine months ended September 30,
	2021		2020		Increase / (Decrease)
Net cash provided by operating activities	$	59,163	$	144,212	$	(85,049)

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Our cash flows provided by operating activities are principally derived from cash receipts from patent license and technology solutions agreements, offset by cash operating expenses and income tax payments. The $85.0 million change in net cash provided by operating activities was primarily driven by lower cash receipts, primarily attributable to the timing of cash receipts related to both new and existing patent license agreements. The table below sets forth the significant items comprising our cash flows provided by operating activities during the nine months ended September 30, 2021 and 2020 (in thousands):

	Nine months ended September 30,
	2021		2020		Increase / (Decrease)
Cash Receipts:
Patent royalties	$	225,914	$	303,918	$	(78,004)
Technology solutions	3,722		4,678		(956)
Total cash receipts	229,636		308,596		(78,960)
Cash Outflows:
Cash operating expenses a	176,996		147,310		29,686
Income taxes paid b	9,835		18,211		(8,376)
Total cash outflows	186,831		165,521		21,310
Other working capital adjustments	16,358		1,137		15,221
Cash flows provided by operating activities	$	59,163	$	144,212	$	(85,049)

______________________________

(a) Cash operating expenses include operating expenses less depreciation of fixed assets, amortization of patents, non-cash compensation and non-cash changes in fair value.

(b) Income taxes paid include foreign withholding taxes.

Cash flows from investing and financing activities

Net cash used in investing activities for the first nine months 2021 was $12.5 million, a $9.4 million change from $22.0 million of net cash used in investing activities in the first nine months 2020. During the first nine months 2021, we sold $18.6 million of short-term marketable securities, net of purchases, we capitalized $30.0 million of patent costs and property plant and equipment purchases, and invested $1.1 million in a new strategic investment. During the first nine months 2020, we sold $7.4 million of short-term marketable securities, net of purchases, and we capitalized $33.6 million of patent costs and property plant and equipment purchases and $4.3 million of cash receipts from the sale of one of our long-term strategic investments.

Net cash used in financing activities for the first nine months 2021 was $54.3 million, a change of $73.0 million from net cash used in financing activities of $127.3 million for the first nine months 2020. This change was primarily attributable to a $94.9 million payment on long-term debt related to the repayment of our 2020 Notes during first quarter 2020 offset by $22.7 million of additional repurchases of common stock and a $1.1 million non-controlling interest distribution in first quarter 2021.

Other

Our combined short-term and long-term deferred revenue balance as of September 30, 2021 was approximately $392.0 million, a net increase of $64.0 million from December 31, 2020. This increase in deferred revenue was primarily attributable to timing of cash receipts from our dynamic fixed-fee royalty agreements and amortization of deferred revenue recognized in the period.

Based on current license agreements, we expect the amortization of dynamic fixed-fee royalty payments to reduce the September 30, 2021 deferred revenue balance of $392.0 million by $325.4 million over the next twelve months.

Convertible Notes

See Note 7, “Obligations” to the notes to condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q for definitions of capitalized terms below.

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Our 2024 Notes, which for purposes of this discussion are also referred to as the "Convertible Notes", are included in the dilutive earnings per share calculation using the if-converted method, as required by the adoption of ASU 2020-06. Under the if-converted method, we must assume that conversion of convertible securities occurs at the beginning of the reporting period. As of December 31, 2020, we made the irrevocable election to settle all conversions of the 2024 Notes through combination settlements of cash and shares of our common stock, with a specified dollar amount of $1,000 per $1,000 principal amount of 2024 Notes and any remaining amounts in shares of common stock. As the principal amount must be paid in cash and only the conversion spread is settled in shares, we only include the net number of incremental shares that would be issued upon conversion. We must calculate the number of shares of our common stock issuable under the terms of the Convertible Notes based on the average market price of our common stock during the applicable reporting period and include that number in the total diluted shares figure for the period.

At the time we issued the Convertible Notes, we entered into the 2024 Call Spread Transactions that together were designed to have the economic effect of reducing the net number of shares that will be issued in the event of conversion of the Convertible Notes by, in effect, increasing the conversion price of the Convertible Notes from our economic standpoint. However, under GAAP, since the impact of the 2024 Note Hedge Transactions is anti-dilutive, we exclude from the calculation of fully diluted shares the number of shares of our common stock that we would receive from the counterparties to these agreements upon settlement.

During periods in which the average market price of our common stock is above the applicable conversion price of the Convertible Notes ($81.29 per share for the 2024 Notes as of September 30, 2021) or above the strike price of the warrants ($109.43 per share for the 2024 Warrant Transactions as of September 30, 2021), the impact of conversion or exercise, as applicable, would be dilutive and such dilutive effect is reflected in diluted earnings per share. As a result, in periods where the average market price of our common stock is above the conversion price or strike price, as applicable, under the if-converted method, we calculate the number of shares issuable under the terms of the Convertible Notes and the warrants based on the average market price of the stock during the period, and include that number in the total diluted shares outstanding for the period.

Under the if-converted method, changes in the price per share of our common stock can have a significant impact on the number of shares that we must include in the fully diluted earnings per share calculation. As described in Note 7, "Obligations," we made the irrevocable election to settle all conversions of the 2024 Notes through combination settlements of cash and shares of our common stock, with a specified dollar amount of $1,000 per $1,000 principal amount of 2024 Notes and any remaining amounts in shares of our common stock ("net share settlement"). Assuming net share settlement upon conversion, the following table illustrates how, based on the $400.0 million aggregate principal amount of the 2024 Notes outstanding as of September 30, 2021, and the approximately 4.9 million warrants related to the 2024 Notes outstanding as of the same date, changes in our stock price would affect (i) the number of shares issuable upon conversion of the Convertible Notes, (ii) the number of shares issuable upon exercise of the warrants subject to the 2024 Warrant Transactions, (iii) the number of additional shares deemed outstanding with respect to the Convertible Notes, after applying the if-converted method, for purposes of calculating diluted earnings per share ("Total If-Converted Method Incremental Shares"), (iv) the number of shares of our common stock deliverable to us upon settlement of the 2024 Note Hedge Transactions and (v) the number of shares issuable upon concurrent conversion of the Convertible Notes, exercise of the warrants subject to the 2024 Warrant Transactions, and settlement of the 2024 Note Hedge Transactions:

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2024 Notes
Market Price Per Share	Shares Issuable Upon Conversion of the 2024 Notes	Shares Issuable Upon Exercise of the 2024 Warrant Transactions	Total If-Converted Method Incremental Shares	Shares Deliverable to InterDigital upon Settlement of the 2024 Note Hedge Transactions	Incremental Shares Issuable (a)
	(Shares in thousands)
$85	215	—	215	(215)	—
$90	476	—	476	(476)	—
$95	710	—	710	(710)	—
$100	921	—	921	(921)	—
$105	1,111	—	1,111	(1,111)	—
$110	1,284	25	1,309	(1,284)	25
$115	1,442	238	1,680	(1,442)	238
$120	1,587	433	2,020	(1,587)	433
$125	1,721	613	2,334	(1,721)	613
$130	1,844	779	2,623	(1,844)	779

______________________________

(a) Represents incremental shares issuable upon concurrent conversion of convertible notes, exercise of warrants and settlement of the hedge agreements.

RESULTS OF OPERATIONS

Third Quarter 2021 Compared to Third Quarter 2020

Revenues

The following table compares third quarter 2021 revenues to third quarter 2020 revenues (in thousands):

	Three months ended September 30,
	2021		2020		Total Increase/(Decrease)
Variable patent royalty revenue	$	8,346	$	7,377	$	969	13	%
Fixed-fee royalty revenue	84,295		77,338		6,957		9	%
Current patent royalties a	92,641		84,715		7,926		9	%
Non-current patent royalties b	50,108		507		49,601		9,783	%
Total patent royalties	142,749		85,222		57,527		68	%
Current technology solutions revenue a	747		2,271		(1,524)		(67)	%
Total revenue	$	143,496	$	87,493	$	56,003	64	%

a.    Recurring revenues are comprised of current patent royalties, inclusive of dynamic fixed-fee royalty payments, and current technology solutions revenue.

b.    Non-recurring revenues are comprised of non-current patent royalties, which include past patent royalties and royalties from static agreements, as well as patent sales.

The $56.0 million increase in total revenue was primarily driven by additional revenues from ten new patent license agreements signed in the last twelve months, including agreements with Xiaomi and a top ten global TV manufacturer signed in third quarter 2021, which primarily drove both a $6.4 million increase in recurring revenue and a $49.6 million increase in non-current patent royalties. These increases in revenue were partially offset by a reduction in revenues resulting from LG's decision to exit the handset business and a decrease in technology solutions revenues from a strategic partner.

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In third quarter 2021 and third quarter 2020, 79% and 67% of our total revenue, respectively, was attributable to companies that individually accounted for 10% or more of our total revenue. In third quarter 2021 and third quarter 2020, the following companies accounted for 10% or more of our total revenue:

	Three months ended September 30,
	2021	2020
Xiaomi	31%	—%
Apple	19%	32%
Vizio	15%	—%
Samsung	14%	22%
Huawei	<10%	13%

Operating Expenses

The following table summarizes the changes in operating expenses between third quarter 2021 and third quarter 2020 by category (in thousands):

	Three months ended September 30,
	2021		2020		Increase/(Decrease)
Patent administration and licensing	$	56,150	$	40,364	$	15,786	39	%
Development	22,546		20,845		1,701		8	%
Selling, general and administrative	20,978		10,854		10,124		93	%
Restructuring activities	7,045		—		7,045		100	%
Total operating expenses	$	106,719	$	72,063	$	34,656	48	%

Operating expenses increased to $106.7 million in third quarter 2021 from $72.1 million in third quarter 2020. The $34.7 million increase in total operating expenses was primarily due to changes in the following items (in thousands):

	Increase/(Decrease)
Supplemental compensation	$	16,479
Revenue share	8,817
Restructuring activities	7,045
Intellectual property enforcement and non-patent litigation	4,018
Other	(1,703)
Total increase in operating expenses	$	34,656

The $34.7 million increase in operating expenses was driven by supplemental compensation, including annual bonus and long-term compensation, and revenue share costs both driven by patent license agreements signed in third quarter 2021. The supplemental compensation increase includes one-time charges of approximately $11.1 million to increase compensation accruals based on licensing success achieved to date, including $6.4 million related to the vesting of performance components of the previously disclosed new hire equity award granted to our CEO, and $2.4 million related to the goal modification associated with the 2019 performance based grant that was modified for all plan participants in the first half 2021 in order to reinforce pay-for-performance and drive employee retention. The $8.8 million increase in revenue share costs related to the above-noted patent license agreement with a top ten global TV manufacturer. In addition, $7.0 million of the increase related to non-recurring restructuring costs incurred as part of our overall restructuring plan. Lastly, there was a $4.0 million increase in intellectual property enforcement costs, primarily driven by the ongoing Lenovo litigations.

Patent Administration and Licensing Expense: The $15.8 million increase in patent administration and licensing expense primarily resulted from the above noted $8.8 million increase in revenue share, as well as the supplemental compensation and, intellectual property enforcement costs discussed above.

Development Expense: Development expense increased $1.7 million primarily resulting from the increase in supplemental compensation costs discussed above.

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Selling, General and Administrative Expense: The $10.1 million increase in selling, general and administrative expense was primarily due to the increase in supplemental compensation costs discussed above, partially offset by a decrease in costs from outside consultants.

Restructuring Activities: We incurred $7.0 million of restructuring expenses associated with our overall restructuring plan, as described in Note 11, "Restructuring Activities" within the notes to condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.

Non-Operating Expense

The following table compares third quarter 2021 non-operating expense to third quarter 2020 non-operating expense (in thousands):

	Three months ended September 30,
	2021		2020		Increase/(Decrease)
Interest expense	$	(5,773)	$	(10,365)	$	4,592	44	%
Interest and investment income	385		825		(440)		(53)	%
Other (expense) income, net	(1,922)		3,169		(5,091)		(161)	%
Total non-operating expense	$	(7,310)	$	(6,371)	$	(939)	(15)	%

The change in non-operating expense between periods was driven by $4.6 million of reduced non-cash interest expense due to the removal of the accretion of the debt discount on the 2024 Notes resulting from the adoption of ASU 2020-06. Additionally, Other (expense) income, net decreased $5.1 million primarily related to a foreign currency translation loss in the three months ended September 30, 2021, compared to a gain in three months ended September 30, 2020 arising from euro translation of our foreign subsidiaries.

Income taxes

In third quarter 2021 and 2020, we had an effective tax rate of 14.4% and (141.8)%, respectively. The effective tax rate in both periods was impacted by losses in certain jurisdictions where the Company presently has recorded a valuation allowance against the related tax benefit, as well as by the foreign-derived intangible income deduction and non-deductible compensation. Excluding this valuation allowance, our third quarter 2021 and 2020 effective tax rate would have been 11.8% and (156.4)%, respectively.

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First Nine Months 2021 Compared to First Nine Months 2020

Revenues

The following table compares first nine months 2021 revenues to first nine months 2020 revenues (in thousands):

	Nine months ended September 30,
	2021		2020		Total Increase/(Decrease)
Variable patent royalty revenue	$	22,765	$	17,920	$	4,845	27	%
Fixed-fee royalty revenue	222,887		221,023		1,864		1	%
Current patent royalties a	245,652		238,943		6,709		3	%
Non-current patent royalties b	63,475		20,461		43,014		210	%
Total patent royalties	309,127		259,404		49,723		19	%
Current technology solutions revenue a	4,467		8,797		(4,330)		(49)	%
Total revenue	$	313,594	$	268,201	$	45,393	17	%

(a)    Recurring revenues are comprised of current patent royalties, inclusive of dynamic fixed-fee royalty payments, and current technology solutions revenue.

(b)    Non-recurring revenues are comprised of non-current patent royalties, which include past patent royalties and royalties from static agreements, as well as patent sales.

The $45.4 million increase in total revenue was primarily driven by the third quarter 2021 Xiaomi and top ten global TV manufacturer patent license agreements, which primarily drove both a $2.4 million increase in recurring revenue and a $43.0 million increase in non-current patent royalties. Revenue from another ten patent license agreements signed in the last eighteen months contributed to the increase in recurring revenue. These increases were partially offset by a reduction in revenues resulting from LG's decision to exit the handset business. The increase in non-current patent royalties was also related to revenues from a static fixed-fee patent license agreement signed in second quarter 2021. These increases in non-current patent royalties were partially offset by the prior period including past sales recognized from the Huawei patent license agreement signed in second quarter 2020. The decrease in technology solutions revenue was primarily due to reduced revenue from a strategic partner.

In first nine months 2021 and first nine months 2020, 71% and 68% of our total revenue, respectively, was attributable to companies that individually accounted for 10% or more of our total revenue. In first nine months 2021 and first nine months 2020, the following companies accounted for 10% or more of our total revenue:

	Nine months ended September 30,
	2021	2020
Apple	27%	31%
Samsung	19%	22%
Xiaomi	14%	—%
Huawei	11%	15%

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Operating Expenses

The following table summarizes the changes in operating expenses between first nine months 2021 and first nine months 2020 by category (in thousands):

	Nine months ended September 30,
	2021		2020		Increase/(Decrease)
Patent administration and licensing	$	133,694	$	119,167	$	14,527	12	%
Development	66,999		61,755		5,244		8	%
Selling, general and administrative	46,994		35,251		11,743		33	%
Restructuring activities	20,290		—		20,290		100	%
Total operating expenses	$	267,977	$	216,173	$	51,804	24	%

Operating expenses increased 24% to $268.0 million in first nine months 2021 from $216.2 million in first nine months 2020. The $51.8 million increase in total operating expenses was primarily due to changes in the following items (in thousands):

	Increase/(Decrease)
Restructuring activities	$	20,290
Supplemental compensation	15,294
Revenue share	8,921
Personnel-related costs	7,358
Intellectual property enforcement and non-patent litigation	6,404
Corporate initiatives	(2,552)
Depreciation and amortization	(1,466)
Other	(2,445)
Total increase in operating expenses	$	51,804

The $51.8 million increase in operating expenses was driven by supplemental compensation, including annual bonus and long-term compensation, and revenue share costs related to the license agreements signed in third quarter 2021. The supplemental compensation increase includes one-time charges of approximately $11.1 million to increase compensation accruals based on licensing success achieved to date, including $6.4 million related to the vesting of performance components of the previously disclosed new hire equity award granted to our CEO, and $2.4 million related to the goal modification associated with the 2019 performance based grant that was modified for all plan participants in the first half 2021 in order to reinforce pay-for-performance and drive employee retention. The $8.9 million increase in revenue share costs related to the above-noted patent license agreement with a top ten global TV manufacturer. In addition, $20.3 million of the increase related to non-recurring restructuring costs incurred as part of our overall restructuring plan, $7.4 million related to increased personnel-related costs primarily driven by new employment agreements, and $6.4 million related to an increase in intellectual property enforcement costs, primarily driven by the Xiaomi and ongoing Lenovo litigations. These increases were offset by a $1.5 million decrease in depreciation and patent amortization costs due to the ongoing efforts to effectively manage our patent portfolio size and a $2.6 million decrease due to ongoing efforts to optimize our cost structure, including the closure of our San Diego office.

Patent Administration and Licensing Expense: The $14.5 million increase in patent administration and licensing expense primarily resulted from the above noted $8.9 million increases in revenue share, as well as the supplemental compensation and intellectual property enforcement costs, discussed above. These increases were partially offset by the decrease in patent amortization discussed above

Development Expense: Development expense increased by $5.2 million primarily resulting from the increases in supplemental compensation and personnel-related costs discussed above.

Selling, General and Administrative Expense: The $11.7 million increase in selling, general and administrative expense primarily resulted from the above-noted increases in supplemental compensation and personnel-related costs, partially offset by the above-noted corporate initiatives, as well as a decrease in outside consulting costs.

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Restructuring Activities: The Company incurred $20.3 million of restructuring expenses associated with the Company's overall restructuring plan, as described in Note 11, "Restructuring Activities" within the notes to condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.

Non-Operating Expense

The following table compares first nine months 2021 non-operating expense to first nine months 2020 non-operating expense (in thousands):

	Nine months ended September 30,
	2021		2020		Increase/(Decrease)
Interest expense	$	(19,429)	$	(30,881)	$	11,452	37	%
Interest and investment income	1,384		5,044		(3,660)		(73)	%
Other income, net	842		8,762		(7,920)		90	%
Total non-operating expense	$	(17,203)	$	(17,075)	$	(128)	(1)	%

The change in non-operating expense between periods was driven by $11.5 million of reduced non-cash interest expense due to the removal of the accretion of the debt discount on the 2024 Notes resulting from the adoption of ASU 2020-06. Additionally, interest and investment income decreased by $3.7 million in the nine months ended September 30, 2021 due to reduced rates of return on our short-term investments. Lastly, the decrease in Other income, net was primarily driven by a decrease in gains resulting from observable price changes of our long-term strategic investments, which were $5.5 million during the nine months ended September 30, 2020 and $1.0 million during the nine months ended September 30, 2021. This decrease was partially offset by a $1.9 million gain on a contract termination in first quarter 2021.

Income taxes

In first nine months 2021 and 2020, we had an effective tax rate of 21.3% and (16.8)%, respectively. The effective tax rate in both periods was driven by losses in certain jurisdictions where the Company presently has recorded a valuation allowance against the related tax benefit, as well as by the foreign-derived intangible income deduction and non-deductible compensation. Excluding this valuation allowance, our first nine months 2021 and 2020 effective tax rate would have been 8.4% and (31.3)%, respectively. In the first nine months 2021 and 2020, we recorded a net discrete tax expense of $0.3 million and $18.2 million, respectively, primarily related to share-based compensation and the expected amendment of a prior year return to utilize a tax asset generated in the prior year.

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STATEMENT PURSUANT TO THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995 — FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended. Such statements include our current beliefs, plans and expectations, including, without limitation, our belief that we will continue to be able to execute strongly on our business during the ongoing COVID-19 pandemic. Words such as "believe," “anticipate,” “estimate,” “expect,” “project,” “intend,” “plan,” “forecast,” "goal," "could," "would," "should," "if," "may," "might," "future," "target," "trend," "seek to," "will continue," "predict," "likely," "in the event," and variations of any such words or similar expressions are intended to identify such forward-looking statements. Forward-looking statements are made on the basis of management’s current views and assumptions and are not guarantees of future performance. Forward-looking statements are inherently subject to risks and uncertainties that could cause actual results, and actual events that occur, to differ materially from results contemplated by the forward-looking statements. These risks and uncertainties include, but are not limited to, the risks and uncertainties described in Part I, Item 1A of our 2020 Form 10-K and Part II, Item 1A "Risk Factors" in this Quarterly Report on Form 10-Q and the risks and uncertainties set forth below:

•unanticipated delays, difficulties or accelerations in the execution of patent license agreements;

•our ability to leverage our strategic relationships and secure new patent license agreements on acceptable terms;

•our ability to enter into sales and/or licensing partnering arrangements for certain of our patent assets;

•our ability to enter into partnerships with leading inventors and research organizations and identify and acquire technology and patent portfolios that align with our roadmap;

•our ability to commercialize our technologies and enter into customer agreements;

•the failure of the markets for our current or new technologies and products to materialize to the extent or at the rate that we expect;

•unexpected delays or difficulties related to the development of our technologies and products;

•changes in our interpretations of, and assumptions and calculations with respect to the impact on us of, the 2017 Tax Cuts and Jobs Act, as well as further guidance that may be issued regarding such act;

•risks related to the potential impact of new accounting standards on our financial position, results of operations or cash flows;

•failure to accurately forecast the impact of our restructuring activities on our financial statements and our business;

•the resolution of current legal proceedings, including any awards or judgments relating to such proceedings, additional legal proceedings, changes in the schedules or costs associated with legal proceedings or adverse rulings in such proceedings;

•the timing and impact of potential administrative and legislative matters;

•changes or inaccuracies in market projections;

•our ability to obtain liquidity though debt and equity financings;

•the potential effects that the ongoing COVID-19 pandemic and/or corresponding macroeconomic uncertainty could have on our financial position, results of operations and cash flows; and

•changes in our business strategy.

We undertake no obligation to revise or update publicly any forward-looking statement for any reason, except as otherwise required by law.

Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

There have been no material changes in quantitative and qualitative market risk from the disclosures included in our 2020 Form 10-K.

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Item 4. CONTROLS AND PROCEDURES.

The Company’s principal executive officer and principal financial officer, with the assistance of other members of management, have evaluated the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended) as of the end of the period covered by this report. Based on that evaluation, the Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures were effective to ensure that the information required to be disclosed by us in the reports that we file or submit under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and to ensure that the information required to be disclosed by us in the reports that we file or submit under the Securities Exchange Act of 1934, as amended, is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure. There were no changes in our internal control over financial reporting that occurred during the quarter ended September 30, 2021, that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II — OTHER INFORMATION

Item 1. LEGAL PROCEEDINGS.

See Note 5, “Litigation and Legal Proceedings,” to the Notes to Condensed Consolidated Financial Statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q for a description of legal proceedings, which is incorporated herein by reference.

Item 1A. RISK FACTORS.

Reference is made to Part I, Item 1A, “Risk Factors” included in our 2020 Form 10-K for information concerning risk factors, which should be read in conjunction with the factors set forth in the Statement Pursuant to the Private Securities Litigation Reform Act of 1995 -- Forward-Looking Statements in Part I, Item 2 of this Quarterly Report on Form 10-Q. Except as set forth below, there have been no material changes with respect to the risk factors disclosed in our 2020 Form 10-K. The risk factors set forth below update, and should be read together with, the risk factors in our 2020 Form 10-K. You should carefully consider such factors, which could materially affect our business, financial condition or future results. The risks described in this Quarterly Report on Form 10-Q and in the 2020 Form 10-K are not the only risks facing our company. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially and adversely affect our business, financial condition and/or operating results.

Risks related to the implementation of our strategic review.

As described in this Quarterly Report on Form 10-Q, during second quarter 2021, we began the process of a strategic review in order to increase focus on core technologies and markets. Related to this review, during second quarter 2021, we commenced the process of a collective economic layoff in which we proposed a reduction in force of 66 positions in our research and innovation unit, the majority of whom are based in France. The process to undertake this collective economic layoff is governed by French labor law, and could take more time and be more costly than anticipated. As part of our further restructuring efforts, in October 2021, we expanded the scope of our reduction in force to include general and administrative functions largely in the U.S. These restructuring initiatives have placed substantial demands on our management, which could lead to the diversion of management’s attention from other business priorities, and we expect these demands will continue. These initiatives could also lead to unanticipated work stoppages, low employee morale, decreased productivity, and a failure to deliver under existing commitments to third parties for research services, which could harm our business. As a result of these or any other factors, we could fail to realize the anticipated benefits associated with the strategic review, which could in turn materially harm our business, financial condition and operating results.

The extent to which the COVID-19 pandemic or any other potential future public health crises, pandemics or similar events will adversely impact our business, financial condition and results of operations is highly uncertain and cannot be predicted.

The COVID-19 pandemic has created significant worldwide uncertainty, volatility and economic disruption. The extent to which COVID-19 and any other potential future public health crises, pandemics or similar events will adversely impact our business, financial condition and results of operations is dependent upon numerous factors, many of which are highly uncertain, rapidly changing and uncontrollable. These factors include, but are not limited to: (i) the duration and scope of the pandemic; (ii) governmental, business and individual actions that have been and continue to be taken in response to the pandemic or other event, including travel restrictions, quarantines, social distancing, work-from-home and shelter-in-place orders and shut-downs; (iii) the impact on our customers, including those that are presently unlicensed, and other business partners; (iv) the impact on U.S. and global economies and the timing and rate of economic recovery; (v) potential adverse effects on the financial markets and access to capital; (vi) potential goodwill or other impairment charges; (vii) increased cybersecurity risks as a result of pervasive remote working conditions; (viii) our ability to effectively carry out our operations due to any adverse impacts on the health and safety of our employees and their families; (ix) the ability of our customers to timely satisfy their payment obligations to us; and (x) fluctuations in global shipments of handsets and consumer electronics devices. Furthermore, as a result of the COVID-19 pandemic, our employees have been required to work from for an extended period of time. The significant increase in remote working could exacerbate certain risks to our business, including an increased risk of cybersecurity events, improper dissemination of personal or confidential information and breakdowns in internal controls and processes. Further, as our employees begin to return to work in our physical locations, they may be exposed to COVID-19, and we may face claims by such employees or regulatory authorities that we have not provided adequate protection to our employees with respect to the spread of COVID-19 at our physical locations, which may affect our business, results of operations, and reputation.

36

Potential patent and litigation reform legislation, potential USPTO and international patent rule changes, potential legislation affecting mechanisms for patent enforcement and available remedies, and potential changes to the intellectual property rights (“IPR”) policies of worldwide standards bodies, as well as rulings in legal proceedings, may affect our investments in research and development and our strategies for patent prosecution, licensing and enforcement and could have a material adverse effect on our licensing business as well as our business as a whole.

Potential changes to certain U.S. and international patent laws, rules and regulations may occur in the future, some or all of which may affect our research and development investments, patent prosecution costs, the scope of future patent coverage we secure, the number of forums in which we can seek to enforce our patents, the remedies that we may be entitled to in patent litigation, and attorneys’ fees or other remedies that could be sought against us, and may require us to reevaluate and modify our research and development activities and patent prosecution, licensing and enforcement strategies. For example, President Biden recently issued an executive order which, among other things, proposed considering changes to the USPTO, DOJ and National Institute of Standards and Technology’s joint policy statement on remedies for SEPs subject to FRAND commitments. The European Commission has also initiated a process to review the EU’s IP policies, in particular as they relate to SEPs and FRAND. Any change as it relates to these matters could impact our ability to negotiate license agreements on favorable terms or at all, limit our potential legal remedies and materially impact our business. Further, legislation designed to reduce the jurisdiction and remedial authority of the USITC has periodically been introduced in Congress.

Any potential changes in the law, the IPR policies of standards bodies or other developments that reduce the number of forums available or the type of relief available in such forums (such as injunctive relief), restrict permissible licensing practices (such as our ability to license on a worldwide portfolio basis) or that otherwise cause us to seek alternative forums (such as arbitration or state court), would make it more difficult for us to enforce our patents, whether in adversarial proceedings or in negotiations. Because we have historically depended on the availability of certain forms of legal process to enforce our patents and obtain fair and adequate compensation for our investments in research and development and the unauthorized use of our intellectual property, developments that undermine our ability to do so could have a negative impact on future licensing efforts.

Rulings in our legal proceedings as well as those of third parties may affect our strategies for patent prosecution, licensing and enforcement. For example, in recent years, the USITC and U.S. courts, including the U.S. Supreme Court and the U.S. Court of Appeals for the Federal Circuit, have taken some actions that have been viewed as unfavorable to patentees, including us. Decisions that occur in the U.S. or in international forums may change the law applicable to various patent law issues, such as, for example, patentability, validity, claim construction, patent exhaustion, patent misuse, permissible licensing practices, available forums, and remedies such as damages and injunctive relief, in ways that are detrimental to the ability of patentees to enforce patents and obtain suitable relief

We continue to monitor and evaluate our strategies for prosecution, licensing and enforcement with regard to these developments; however, any resulting change in such strategies may have an adverse impact on our business and financial condition.

We regularly make strategic decisions about our patent portfolio. Although we seek to focus our operations in areas where we see the potential for growth and to divest assets where we see more limited opportunities, dispositions we decide to undertake may involve risks, and the anticipated benefits of such actions may not be realized.

From time to time, we intend to make strategic decisions about our patent portfolio, whether through a formal portfolio review or opportunistic dispositions. Cost savings expectations of any portfolio review are inherently uncertain and, therefore, we cannot provide assurance that we will achieve any expected, or any actual cost savings from any such action. Our portfolio review activities may place substantial demands on our management, which could lead to the diversion of management’s attention from other business priorities. We have divested a number of assets, including as part of a recent strategic portfolio rationalization review. Any assets that we divest could turn out to be more valuable than we had anticipated and we may not realize the anticipated benefits of any strategic decision about our patent portfolio.

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

Issuer Purchases of Equity Securities

The following table provides information regarding the Company’s purchases of its common stock during third quarter 2021.

Period	Total Number of Shares Purchased (1)	Average Price Paid Per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs (2)	Maximum Number (or Approximate Dollar Value) of Shares That May Yet Be Purchased Under the Plans or Programs (3)
July 1, 2021 - July 31, 2021	119,625	$	65.00	119,625	$	52,545,104
August 1, 2021 - August 31, 2021	24,601	$	66.17	24,601	$	50,916,683
September 1, 2021 - September 30, 2021	36,308	$	67.53	36,308	$	48,464,207
Total	180,534	$	65.67	180,534	$	48,464,207

(1) Total number of shares purchased during each period reflects share purchase transactions that were completed (i.e., settled) during the period indicated.

(2) Shares were purchased pursuant to the 2014 Repurchase Program, $300 million of which was authorized by the Company’s Board of Directors in June 2014, with an additional $100 million authorized by the Company’s Board of Directors in each of June 2015, September 2017, December 2018, and May 2019, respectively. The 2014 Repurchase Program has no expiration date. The Company may repurchase shares under the 2014 Repurchase Program through open market purchases, pre-arranged trading plans, or privately negotiated purchases.

(3) Amounts shown in this column reflect the amounts remaining under the 2014 Repurchase Program.    

Item 4. MINE SAFETY DISCLOSURES.

Not applicable.

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Item 6. EXHIBITS.

The following is a list of exhibits filed with this Quarterly Report on Form 10-Q:

Exhibit Number	Exhibit Description
31.1	Certification of Principal Executive Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934, as amended.
31.2	Certification of Principal Financial Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934, as amended.
32.1+	Certification of Principal Executive Officer pursuant to 18 U.S.C. Section 1350.
32.2+	Certification of Principal Financial Officer pursuant to 18 U.S.C. Section 1350.
101.INS	Inline Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH	Inline Schema Document
101.CAL	Inline Calculation Linkbase Document
101.DEF	Inline Definition Linkbase Document
101.LAB	Inline Labels Linkbase Document
101.PRE	Inline Presentation Linkbase Document
104	Inline Cover Page Interactive Data File (formatted as Inline XBRL with applicable taxonomy extension information contained in Exhibits 101)

______________________________

+ This exhibit will not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (15 U.S.C. 78r), or otherwise subject to the liability of that section. Such exhibit will not be deemed to be incorporated by reference into any filing under the Securities Act or Securities Exchange Act, except to the extent that InterDigital, Inc. specifically incorporates it by reference.

39

SIGNATURES

Pursuant to the requirements 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.

	INTERDIGITAL, INC.
Date: November 4, 2021	/s/ LIREN CHEN
	Liren Chen
	President and Chief Executive Officer
Date: November 4, 2021	/s/ RICHARD J. BREZSKI
	Richard J. Brezski
	Chief Financial Officer

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EX-31.1

EXHIBIT 31.1

CERTIFICATIONS

I, Liren Chen, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of InterDigital, 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: November 4, 2021	/s/ Liren Chen
	Liren Chen
	President and Chief Executive Officer

EX-31.2

EXHIBIT 31.2

CERTIFICATIONS

I, Richard J. Brezski, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of InterDigital, 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: November 4, 2021	/s/ Richard J. Brezski
	Richard J. Brezski
	Chief Financial Officer

EX-32.1

EXHIBIT 32.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

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 accompanying Quarterly Report on Form 10-Q of InterDigital, Inc. (the “Company”) for the quarter ended September 30, 2021, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Liren Chen, President and Chief Executive Officer of the Company, hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 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.

Date: November 4, 2021	/s/ Liren Chen
	Liren Chen
	President and Chief Executive Officer

EX-32.2

EXHIBIT 32.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

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 accompanying Quarterly Report on Form 10-Q of InterDigital, Inc. (the “Company”) for the quarter ended September 30, 2021, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Richard J. Brezski, Chief Financial Officer of the Company, hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 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.

Date: November 4, 2021	/s/ Richard J. Brezski
	Richard J. Brezski
	Chief Financial Officer

XML

Cover Page - shares	9 Months Ended
	Sep. 30, 2021	Nov. 02, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	1-33579
Entity Registrant Name	INTERDIGITAL, INC.
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	82-4936666
Entity Address, Address Line One	200 Bellevue Parkway
Entity Address, Address Line Two	Suite 300
Entity Address, City or Town	Wilmington
Entity Address, State or Province	DE
Entity Address, Postal Zip Code	19809-3727
City Area Code	302
Local Phone Number	281-3600
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	IDCC
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		30,677,998
Entity Central Index Key	0001405495
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Amendment Flag	false

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 467,606	$ 473,474
Short-term investments	433,200	453,173
Accounts receivable, less allowances of $322 and $0	141,657	16,008
Prepaid and other current assets	80,304	59,894
Total current assets	1,122,767	1,002,549
PROPERTY AND EQUIPMENT, NET	14,182	16,630
PATENTS, NET	371,857	418,343
DEFERRED TAX ASSETS	94,850	80,380
OTHER NON-CURRENT ASSETS, NET	96,956	98,373
Total non-current assets	577,845	613,726
TOTAL ASSETS	1,700,612	1,616,275
CURRENT LIABILITIES:
Accounts payable	9,555	10,979
Accrued compensation and related expenses	33,838	32,413
Deferred revenue	325,375	219,935
Dividends payable	10,740	10,786
Other accrued expenses	38,521	21,649
Total current liabilities	418,029	295,762
LONG-TERM DEBT	421,420	367,992
LONG-TERM DEFERRED REVENUE	66,673	108,069
OTHER LONG-TERM LIABILITIES	59,173	47,886
TOTAL LIABILITIES	965,295	819,709
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS’ EQUITY:
Preferred Stock, $0.10 par value, 14,399 shares authorized, 0 shares issued and outstanding	0	0
Common Stock, $0.01 par value, 100,000 shares authorized, 71,616 and 71,389 shares issued and 30,689 and 30,816 shares outstanding	716	714
Additional paid-in capital	762,178	738,481
Retained earnings	1,364,378	1,413,969
Accumulated other comprehensive loss	(390)	(184)
TOTAL SHAREHOLDERS’ EQUITY	2,126,882	2,152,980
Treasury stock, 40,927 and 40,573 shares of common held at cost	1,402,611	1,379,611
Total InterDigital, Inc. shareholders’ equity	724,271	773,369
Noncontrolling interest	11,046	23,197
Total equity	735,317	796,566
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 1,700,612	$ 1,616,275

XML

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
CURRENT ASSETS:
Accounts receivable, less allowances of $322 and $0	$ 322	$ 0
SHAREHOLDERS’ EQUITY:
Preferred stock, par value (in USD per share)	$ 0.10	$ 0.10
Preferred stock, shares authorized (in shares)	14,399,000	14,399,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	71,616,000	71,389,000
Common stock, shares outstanding (in shares)	30,689,000	30,816,000
Treasury stock, shares of common held at cost (in shares)	40,927,000	40,573,000

XML

Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
REVENUES	$ 143,496	$ 87,493	$ 313,594	$ 268,201
OPERATING EXPENSES:
Patent administration and licensing	56,150	40,364	133,694	119,167
Development	22,546	20,845	66,999	61,755
Selling, general and administrative	20,978	10,854	46,994	35,251
Restructuring activities	7,045	0	20,290	0
Total Operating expenses	106,719	72,063	267,977	216,173
Income from operations	36,777	15,430	45,617	52,028
INTEREST EXPENSE	(5,773)	(10,365)	(19,429)	(30,881)
OTHER (EXPENSE) INCOME, NET	(1,537)	3,994	2,226	13,806
Income before income taxes	29,467	9,059	28,414	34,953
INCOME TAX (PROVISION) BENEFIT	(4,253)	12,843	(6,039)	5,879
NET INCOME	25,214	21,902	22,375	40,832
Net loss attributable to noncontrolling interest	(1,014)	(1,882)	(11,042)	(5,319)
NET INCOME ATTRIBUTABLE TO INTERDIGITAL, INC.	$ 26,228	$ 23,784	$ 33,417	$ 46,151
NET INCOME PER COMMON SHARE — BASIC (in USD per share)	$ 0.85	$ 0.77	$ 1.09	$ 1.50
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING — BASIC (in shares)	30,737	30,804	30,792	30,762
NET INCOME PER COMMON SHARE — DILUTED (in USD per share)	$ 0.83	$ 0.76	$ 1.07	$ 1.49
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING — DILUTED (in shares)	31,431	31,119	31,272	31,029
Patent licensing royalties
REVENUES	$ 142,749	$ 85,222	$ 309,127	$ 259,404
Technology solutions
REVENUES	$ 747	$ 2,271	$ 4,467	$ 8,797

XML

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 25,214	$ 21,902	$ 22,375	$ 40,832
Unrealized (loss) gain on investments, net of tax	(67)	(362)	(206)	82
Comprehensive income	25,147	21,540	22,169	40,914
Comprehensive loss attributable to noncontrolling interest	(1,014)	(1,882)	(11,042)	(5,319)
Total comprehensive income attributable to InterDigital, Inc.	$ 26,161	$ 23,422	$ 33,211	$ 46,233

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Condensed Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-In Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Loss	Treasury Stock	Non-Controlling Interest
Beginning balance (in shares) at Dec. 31, 2019			71,268					40,567
Beginning balance at Dec. 31, 2019	$ 786,281		$ 712	$ 727,402	$ 1,412,779		$ (74)	$ (1,379,262)	$ 24,724
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to InterDigital, Inc.	116				116
Net loss attributable to noncontrolling interest	(1,777)								(1,777)
Net change in unrealized loss on short-term investments	32						32
Dividends declared ($0.35 per share)	(10,763)			84	(10,847)
Exercise of common stock options (in shares)			27
Exercise of common stock options	778		$ 1	777
Issuance of common stock, net (in shares)			27
Issuance of common stock, net	(725)			(725)
Amortization of unearned compensation	2,003			2,003
Repurchase of common stock (in shares)								6
Repurchase of common stock	(349)							$ (349)
Ending balance (in shares) at Mar. 31, 2020			71,322					40,573
Ending balance at Mar. 31, 2020	775,596		$ 713	729,541	1,402,048		(42)	$ (1,379,611)	22,947
Beginning balance (in shares) at Dec. 31, 2019			71,268					40,567
Beginning balance at Dec. 31, 2019	786,281		$ 712	727,402	1,412,779		(74)	$ (1,379,262)	24,724
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to InterDigital, Inc.	46,151
Net loss attributable to noncontrolling interest	(5,319)
Net change in unrealized loss on short-term investments	82
Ending balance (in shares) at Sep. 30, 2020			71,379					40,573
Ending balance at Sep. 30, 2020	802,676		$ 713	735,922	1,426,239		8	$ (1,379,611)	19,405
Beginning balance (in shares) at Mar. 31, 2020			71,322					40,573
Beginning balance at Mar. 31, 2020	775,596		$ 713	729,541	1,402,048		(42)	$ (1,379,611)	22,947
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to InterDigital, Inc.	22,251				22,251
Net loss attributable to noncontrolling interest	(1,660)								(1,660)
Net change in unrealized loss on short-term investments	412						412
Dividends declared ($0.35 per share)	(10,781)			136	(10,917)
Exercise of common stock options (in shares)			19
Exercise of common stock options	1,014			1,014
Issuance of common stock, net (in shares)			36
Issuance of common stock, net	(755)			(755)
Amortization of unearned compensation	4,629			4,629
Ending balance (in shares) at Jun. 30, 2020			71,377					40,573
Ending balance at Jun. 30, 2020	790,706		$ 713	734,565	1,413,382		370	$ (1,379,611)	21,287
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to InterDigital, Inc.	23,784				23,784
Net loss attributable to noncontrolling interest	(1,882)								(1,882)
Net change in unrealized loss on short-term investments	(362)						(362)
Dividends declared ($0.35 per share)	(10,782)			145	(10,927)
Issuance of common stock, net (in shares)			2
Issuance of common stock, net	(55)			(55)
Amortization of unearned compensation	1,267			1,267
Ending balance (in shares) at Sep. 30, 2020			71,379					40,573
Ending balance at Sep. 30, 2020	802,676		$ 713	735,922	1,426,239		8	$ (1,379,611)	19,405
Beginning balance (in shares) at Dec. 31, 2020			71,389					40,573
Beginning balance at Dec. 31, 2020	796,566	$ (50,184)	$ 714	738,481	1,413,969	$ (50,184)	(184)	$ (1,379,611)	23,197
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to InterDigital, Inc.	5,571				5,571
Net loss attributable to noncontrolling interest	(1,613)								(1,613)
Noncontrolling interest distribution	(1,109)								(1,109)
Net change in unrealized loss on short-term investments	(70)						(70)
Dividends declared ($0.35 per share)	(10,766)			210	(10,976)
Exercise of common stock options (in shares)			32
Exercise of common stock options	737		$ 0	737
Issuance of common stock, net (in shares)			55
Issuance of common stock, net	(2,962)			(2,962)
Amortization of unearned compensation	2,153			2,153
Repurchase of common stock (in shares)								91
Repurchase of common stock	(5,750)							$ (5,750)
Ending balance (in shares) at Mar. 31, 2021			71,476					40,664
Ending balance at Mar. 31, 2021	732,573		$ 714	738,619	1,358,380		(254)	$ (1,385,361)	20,475
Beginning balance (in shares) at Dec. 31, 2020			71,389					40,573
Beginning balance at Dec. 31, 2020	796,566	$ (50,184)	$ 714	738,481	1,413,969	$ (50,184)	(184)	$ (1,379,611)	23,197
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to InterDigital, Inc.	33,417
Net loss attributable to noncontrolling interest	(11,042)
Net change in unrealized loss on short-term investments	(206)
Ending balance (in shares) at Sep. 30, 2021			71,616					40,927
Ending balance at Sep. 30, 2021	735,317		$ 716	762,178	1,364,378		(390)	$ (1,402,611)	11,046
Beginning balance (in shares) at Mar. 31, 2021			71,476					40,664
Beginning balance at Mar. 31, 2021	732,573		$ 714	738,619	1,358,380		(254)	$ (1,385,361)	20,475
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to InterDigital, Inc.	1,618				1,618
Net loss attributable to noncontrolling interest	(8,415)								(8,415)
Net change in unrealized loss on short-term investments	(69)						(69)
Dividends declared ($0.35 per share)	(10,767)			158	(10,925)
Exercise of common stock options (in shares)			71
Exercise of common stock options	3,632		$ 1	3,631
Issuance of common stock, net (in shares)			41
Issuance of common stock, net	(711)			(711)
Amortization of unearned compensation	3,775			3,775
Repurchase of common stock (in shares)								82
Repurchase of common stock	(5,391)							$ (5,391)
Ending balance (in shares) at Jun. 30, 2021			71,588					40,746
Ending balance at Jun. 30, 2021	716,245		$ 715	745,472	1,349,073		(323)	$ (1,390,752)	12,060
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to InterDigital, Inc.	26,228				26,228
Net loss attributable to noncontrolling interest	(1,014)								(1,014)
Net change in unrealized loss on short-term investments	(67)						(67)
Dividends declared ($0.35 per share)	(10,740)			183	(10,923)
Exercise of common stock options (in shares)			23
Exercise of common stock options	1,516		$ 1	1,515
Issuance of common stock, net (in shares)			5
Issuance of common stock, net	(74)			(74)
Amortization of unearned compensation	15,082			15,082
Repurchase of common stock (in shares)								181
Repurchase of common stock	(11,859)							$ (11,859)
Ending balance (in shares) at Sep. 30, 2021			71,616					40,927
Ending balance at Sep. 30, 2021	$ 735,317		$ 716	$ 762,178	$ 1,364,378		$ (390)	$ (1,402,611)	$ 11,046

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Condensed Consolidated Statements of Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Statement of Stockholders' Equity [Abstract]
Dividends declared (in USD per share)	$ 0.35	$ 0.35	$ 0.35	$ 0.35	$ 0.35	$ 0.35
Accounting Standards Update [Extensible List]			Accounting Standards Update 2020-06
Unrealized (loss) gain on investments, net of tax	$ (67)	$ (69)	$ (70)	$ (362)	$ 412	$ 32
Repurchase of common stock	(11,859)	(5,391)	(5,750)			(349)
Amortization of unearned compensation	15,082	3,775	2,153	1,267	4,629	2,003
Exercise of common stock options	1,516	3,632	737		1,014	778
Issuance of common stock, net	(74)	(711)	(2,962)	(55)	(755)	(725)
Dividends declared ($0.35 per share)	(10,740)	(10,767)	(10,766)	(10,782)	(10,781)	(10,763)
Net income attributable to InterDigital, Inc.	26,228	1,618	5,571	23,784	22,251	116
Net loss attributable to noncontrolling interest	(1,014)	(8,415)	(1,613)	(1,882)	(1,660)	(1,777)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 735,317	$ 716,245	$ 732,573	$ 802,676	$ 790,706	$ 775,596

XML

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 22,375	$ 40,832
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	58,971	61,027
Non-cash interest expense, net	5,240	13,202
Non-cash change in fair-value	(949)	(5,501)
Change in deferred revenue	64,044	53,066
Deferred income taxes	(14,416)	(5,518)
Share-based compensation	21,010	7,899
Patent impairment	11,000	0
Other	0	(63)
Increase in assets
Receivables	(125,649)	(10)
Deferred charges and other assets	(13,464)	(26,745)
Increase (decrease) in liabilities:
Accounts payable	2,266	(1,675)
Accrued compensation and other expenses	28,735	7,698
Net cash provided by operating activities	59,163	144,212
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of short-term investments	(498,151)	(187,707)
Sales of short-term investments	516,715	195,072
Purchases of property and equipment	(1,877)	(9,875)
Capitalized patent costs	(28,145)	(23,726)
Long-term investments	(1,091)	4,260
Net cash used in investing activities	(12,549)	(21,976)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from exercise of stock options	5,885	1,792
Payments on long-term debt	0	(94,909)
Repurchase of common stock	(23,000)	(349)
Non-controlling interest distribution	(1,109)	0
Taxes withheld upon restricted stock unit vestings	(3,747)	(1,535)
Dividends paid	(32,319)	(32,290)
Net cash used in financing activities	(54,290)	(127,291)
NET DECREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(7,676)	(5,055)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF PERIOD	477,663	757,098
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD	$ 469,987	$ 752,043

XML

Basis of Presentation

9 Months Ended

Sep. 30, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

BASIS OF PRESENTATION

BASIS OF PRESENTATION

In the opinion of management, the accompanying unaudited, condensed consolidated financial statements contain all adjustments, consisting only of normal recurring adjustments, necessary for a fair statement of the financial position of InterDigital, Inc. (individually and/or collectively with its subsidiaries referred to as “InterDigital,” the “Company,” “we,” “us” or “our,” unless otherwise indicated) as of September 30, 2021, the results of our operations for the three and nine months ended September 30, 2021 and 2020 and our cash flows for the nine months ended September 30, 2021 and 2020. The accompanying unaudited, condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and, accordingly, do not include all of the detailed schedules, information and notes necessary to state fairly the financial condition, results of operations and cash flows in conformity with United States generally accepted accounting principles (“GAAP”). The year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by GAAP for year-end financial statements. Therefore, these financial statements should be read in conjunction with the financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020 (our “2020 Form 10-K”) as filed with the Securities and Exchange Commission (“SEC”) on February 18, 2021. Definitions of capitalized terms not defined herein appear within our 2020 Form 10-K. The results of operations for interim periods are not necessarily indicative of the results to be expected for the entire year. We have one reportable segment.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the date of the financial statements, as well as the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates.

InterDigital has analyzed the impact of the ongoing Coronavirus pandemic (“COVID-19”) on its financial statements as of September 30, 2021.  InterDigital has determined that the changes to its significant judgments and estimates as a result of COVID-19 did not have a material impact on its financial statements.  The potential impact of COVID-19 will continue to be analyzed going forward.

Change in Accounting Policies

There have been no material changes or updates to our existing accounting policies from the disclosures included in our 2020 Form 10-K, except as indicated below in "New Accounting Guidance".

Prior Periods' Financial Statement Revision

In connection with the preparation of the condensed consolidated financial statements as of and for the three months ended June 30, 2021, it was identified that we incorrectly classified certain tax receivables, representing approximately 1.5% of total assets as of December 31, 2020, as other current assets instead of non-current in the presentation of our consolidated balance sheet.

We assessed the materiality of this misstatement on prior periods’ financial statements in accordance with ASC Topic 250, Accounting Changes and Error Corrections, (“ASC 250”) and concluded it was not material to any prior annual or interim periods. In accordance with ASC 250, we have corrected our presentation of other current and non-current assets for prior periods presented in this Form 10-Q by revising the condensed consolidated financial statements and other consolidated financial information included herein. We will continue to present the prior periods on this revised basis to the extent we present such prior periods in future filings. Refer to Note 10, "Other Assets" for additional information on the revision.

Reclassifications

Certain reclassifications have been made to prior year amounts to conform to the current year presentation.

Supplemental Cash Flow Information

The following table presents additional supplemental cash flow information for the nine months ended September 30, 2021 and 2020 (in thousands):

	FOR THE NINE MONTHS ENDED SEPTEMBER 30,
SUPPLEMENTAL CASH FLOW INFORMATION:	2021		2020
Interest paid	$	4,000	$	4,712
Income taxes paid, including foreign withholding taxes	9,835		18,211
Non-cash investing and financing activities:
Dividend payable	10,740		10,782
Non-cash acquisition of patents	—		33,300
Accrued capitalized patent costs and property and equipment	3,690		(419)
Unsettled repurchase of common stock	499		—

New Accounting Guidance

Accounting Standards Update: Simplifying the Accounting for Income Taxes

In December 2019, the FASB issued ASU No. 2019-12, "Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes" ("ASU 2019-12"). The amendments in this ASU are intended to simplify various aspects related to accounting for income taxes. ASU 2019-12 removes certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve consistent application. ASU 2019-12 is effective for fiscal years beginning after December 15, 2020 with early adoption allowed. We adopted this guidance as of January 1, 2021 and the adoption did not have a material impact on our consolidated financial statements.

Accounting Standards Update: Simplifying the Accounting for Convertible Instruments

In August 2020, the FASB issued ASU No. 2020-06, “Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity” (“ASU 2020-06”). The amendments in this ASU are intended to simplify accounting for convertible debt instruments and convertible preferred stock by removing certain accounting models which separate the embedded conversion features from the host contract. ASU 2020-06 also amends certain guidance in ASC 260 on the computation of earnings per share for convertible instruments and contracts on an entity’s own equity. ASU 2020-06 is effective for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years, and early adoption is permitted for fiscal years beginning after December 15, 2020. This update permits the use of either the modified retrospective or fully retrospective methods of transition. We elected to early adopt this standard on a modified retrospective approach as of January 1, 2021.

This adoption increased long-term debt by $50.2 million at January 1, 2021, which was comprised of $51.6 million of unamortized interest discount and was partially offset by a net increase of $1.4 million equity component of deferred financing costs. This was due to the standard no longer requiring bifurcation of the embedded conversion feature from the host contract on the 2024 Notes, as defined in Note 7, "Obligations." This adoption also reduced non-cash interest expense starting in 2021 due to the removal of the accretion of the debt discount on the 2024 Notes.

Lastly, the adoption requires the use of the if-converted method of calculating diluted earnings per share rather than the treasury stock method for convertible instruments and requires the inclusion of the potential effect of shares settled in cash or shares in the diluted earnings per share calculation. Due to the reduction in non-cash interest expense, this adoption increased both basic and diluted earnings per share by $0.09 in the three months ended September 30, 2021 and $0.26 in the nine months ended September 30, 2021.

Accounting Standards Update: Issuer’s Accounting for Certain Modifications or Exchanges of Freestanding Equity Classified Written Call Options

In May 2021, the FASB issued ASU No. 2021-04. The amendments in this ASU are intended to clarify and reduce diversity in an issuer’s accounting for modifications or exchanges of freestanding equity-classified written call options, including warrants, that remain equity classified after modification or exchange. ASU 2021-04 is effective for fiscal years beginning after December 15, 2021, with early adoption allowed. The Company is currently evaluating the anticipated impact of the adoption of ASU 2021-04 on its consolidated financial statements.

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Revenue

9 Months Ended

Sep. 30, 2021

Revenue from Contract with Customer [Abstract]

REVENUE

REVENUE

Disaggregated Revenue

The following table presents the disaggregation of our revenue for the three and nine months ended September 30, 2021 and 2020 (in thousands):

	Three months ended September 30,
	2021		2020		Increase/(Decrease)
Variable patent royalty revenue	$	8,346	$	7,377	$	969	13	%
Fixed-fee royalty revenue	84,295		77,338		6,957		9	%
Current patent royalties a	92,641		84,715		7,926		9	%
Non-current patent royalties b	50,108		507		49,601		9,783	%
Total patent royalties	142,749		85,222		57,527		68	%
Current technology solutions revenue a	747		2,271		(1,524)		(67)	%
Total revenue	$	143,496	$	87,493	$	56,003	64	%

	Nine months ended September 30,
	2021		2020		Increase/(Decrease)
Variable patent royalty revenue	$	22,765	$	17,920	$	4,845	27	%
Fixed-fee royalty revenue	222,887		221,023		1,864		1	%
Current patent royalties a	245,652		238,943		6,709		3	%
Non-current patent royalties b	63,475		20,461		43,014		210	%
Total patent royalties	309,127		259,404		49,723		19	%
Current technology solutions revenue a	4,467		8,797		(4,330)		(49)	%
Total revenue	$	313,594	$	268,201	$	45,393	17	%

a.    Recurring revenues are comprised of current patent royalties, inclusive of dynamic fixed-fee royalty payments, and current technology solutions revenue.

b.    Non-recurring revenues are comprised of non-current patent royalties, which include past patent royalties and royalties from static agreements, as well as patent sales.

During the nine months ended September 30, 2021, we recognized $186.9 million of revenue that had been included in deferred revenue as of the beginning of the period. As of September 30, 2021, we had contract assets of $20.5 million and $8.7 million included within "Accounts receivable" and "Other non-current assets, net" in the condensed consolidated balance sheet, respectively. As of December 31, 2020, we had contract assets of $9.7 million and $8.9 million included within "Accounts receivable" and "Other non-current assets, net" in the condensed consolidated balance sheet, respectively.

Contracted Revenue

Based on contracts signed and committed as of September 30, 2021, we expect to recognize the following revenue from dynamic fixed-fee royalty payments over the term of such contracts (in thousands):

	Revenue
Remainder 2021	$	89,541
2022	299,307
2023	104,469
2024	60,089
2025 and beyond	60,000
Total Revenue	$	613,406

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Income Taxes

9 Months Ended

Sep. 30, 2021

Income Tax Disclosure [Abstract]

INCOME TAXES

INCOME TAXES

In the nine months ended September 30, 2021 and 2020, the Company had an effective tax rate of 21.3% and (16.8)%, respectively. The effective tax rate in both periods was impacted by losses in certain jurisdictions where the Company presently has recorded a valuation allowance against the related tax benefit, as well as by the foreign-derived intangible income deduction and non-deductible compensation. Excluding this valuation allowance, our effective tax rate for the nine months ended September 30, 2021 and 2020 would have been 8.4% and (31.3)% respectively. During the nine months ended September 30, 2021 and 2020, the Company recorded a discrete net expense of $0.3 million and $18.2 million, respectively, primarily related to share-based compensation and the expected amendment of a prior year return to utilize a tax asset generated in the prior year. Due to the closing of the statute of limitations on certain tax years, the Company believes it is reasonably possible that it will have a reduction in the liability for unrecognized tax benefits of $1.1 million, excluding interest and penalties.

The effective tax rate reported in any given year will continue to be influenced by a variety of factors, including timing differences between the recognition of book and tax revenue, the level of pre-tax income or loss, the foreign vs. domestic classification of the Company’s customers, and any discrete items that may occur.

During the nine months ended September 30, 2021 and 2020, the Company paid approximately $8.9 million and $17.8 million, respectively, in foreign source creditable withholding tax.

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Net Income (Loss) Per Share

9 Months Ended

Sep. 30, 2021

Earnings Per Share [Abstract]

NET INCOME (LOSS) PER SHARE

NET INCOME PER SHARE

Basic Earnings Per Share ("EPS") is calculated by dividing net income or loss available to common shareholders by the weighted-average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if options or other securities with features that could result in the issuance of common stock were exercised or converted to common stock or resulting from the unvested outstanding RSUs. The following tables reconcile the numerator and the denominator of the basic and diluted net income per share computation (in thousands, except for per share data):

	Three months ended September 30,				Nine months ended September 30,
	2021		2020		2021		2020
Net income applicable to InterDigital, Inc.	$	26,228	$	23,784	$	33,417	$	46,151
Weighted-average shares outstanding:
Basic	30,737		30,804		30,792		30,762
Dilutive effect of stock options, RSUs, convertible securities and warrants	694		315		480		267
Diluted	31,431		31,119		31,272		31,029
Earnings per share:
Basic	$	0.85	$	0.77	$	1.09	$	1.50
Dilutive effect of stock options, RSUs, convertible securities and warrants	(0.02)		(0.01)		(0.02)		(0.01)
Diluted	$	0.83	$	0.76	$	1.07	$	1.49

Shares of common stock issuable upon the exercise or conversion of certain securities have been excluded from our computation of EPS because the strike price or conversion rate, as applicable, of such securities was greater than the average market price of our common stock and, as a result, the effect of such exercise or conversion would have been anti-dilutive. Set forth below are the securities and the weighted average number of shares of common stock underlying such securities that were excluded from our computation of EPS for the periods presented (in thousands):

	Three months ended September 30,		Nine months ended September 30,
	2021	2020	2021	2020
Restricted stock units and stock options	441	156	289	154
Convertible securities(a)	—	4,921	—	5,222
Warrants	4,921	5,319	4,921	5,931
Total	5,362	10,396	5,210	11,307

______________________________

(a)As of December 31, 2020, we made the irrevocable election to settle all conversions of the 2024 Notes through combination settlements of cash and shares of our common stock, with a specified dollar amount of $1,000 per $1,000 principal amount of 2024 Notes and any remaining amounts in shares of our common stock.

Convertible Notes and Warrants

Refer to Note 7, "Obligations," for information about the Company's convertible notes and warrants and related conversion and strike prices. During periods in which the average market price of the Company's common stock is above the applicable conversion price of the Company's convertible notes, or above the strike price of the Company's outstanding warrants, the impact of conversion or exercise, as applicable, would be dilutive and such dilutive effect is reflected in diluted EPS. As a result, in periods where the average market price of the Company's common stock is above the conversion price or strike price, as applicable, under the if-converted method, the Company calculates the number of shares issuable under the terms of the convertible notes and the warrants based on the average market price of the stock during the period, and includes that number in the total diluted shares outstanding for the period.

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Litigation and Legal Proceedings

9 Months Ended

Sep. 30, 2021

Litigation Settlement [Abstract]

LITIGATION AND LEGAL PROCEEDINGS

LITIGATION AND LEGAL PROCEEDINGS

COURT PROCEEDINGS

Lenovo

UK Proceeding

On August 27, 2019, the Company and certain of its subsidiaries filed a claim in the UK High Court against Lenovo Group Limited and certain of its subsidiaries. The claim, as amended, alleges infringement of five of the Company's patents relating to 3G and/or 4G/LTE standards: European Patent (U.K.) Nos. 2,363,008; 2,421,318; 2,485,558; 2,557,714; and 3,355,537.

The UK High Court held case management conferences on October 6, 2020 and December 16, 2020, a disclosure hearing on January 19, 2021 and pre-trial review hearings for the first trial on January 28, 2021 and February 8, 2021. At those hearings, the UK High Court entered a schedule for the technical and non-technical FRAND proceedings. Two technical trials were scheduled for March 2021 and June 2021 and the non-technical FRAND trial is scheduled in January 2022. There are three additional technical trials scheduled for the remaining patents following the FRAND trial. The first and second technical trials were completed, and on July 29, 2021, the UK High Court issued its decision regarding the first technical trial finding European Patent (UK) No. 2 485 558 valid, infringed, and essential to Release 8 of LTE. The Company is awaiting the court’s decision regarding the merits of the second technical trial.

District of Delaware Patent Proceeding

On August 28, 2019, the Company and certain of its subsidiaries filed a complaint in the United States District Court for the District of Delaware (the "Delaware District Court") against Lenovo Holding Company, Inc. and certain of its subsidiaries alleging that Lenovo infringes eight of InterDigital's U.S. patents—U.S. Patent Nos. 8,085,665; 8,199,726; 8,427,954; 8,619,747; 8,675,612; 8,797,873; 9,203,580; and 9,456,449—by making, using, offering for sale, and/or selling Lenovo wireless devices with 3G and/or 4G LTE capabilities. As relief, InterDigital is seeking: (a) a declaration that InterDigital is not in breach of its relevant FRAND commitments with respect to Lenovo; (b) to the extent Lenovo does not agree to negotiate a worldwide patent license, does not agree to enter into binding international arbitration to set the terms of a FRAND license, and does not agree to be bound by the FRAND terms to be set by the UK High Court in the separately filed UK proceedings described above, an injunction prohibiting Lenovo from continued infringement; (c) damages, including enhanced damages for willful infringement and supplemental damages; and (d) attorneys’ fees and costs.

On September 16, 2020, the Delaware District Court entered a schedule for the case, setting a patent jury trial. On March 8, 2021, the Delaware District Court held a claim construction hearing, and the court issued its order on May 10, 2021 construing various disputed terms. On March 24, 2021, the Delaware District Court consolidated the antitrust proceeding discussed below with this patent proceeding. Trial for the consolidated proceedings is scheduled for December 5, 2022.

District of Delaware Antitrust Proceeding

On April 9, 2020, Lenovo (United States) Inc. and Motorola Mobility LLC filed a complaint in the Delaware District Court against the Company and certain of its subsidiaries. The complaint alleges that the Company defendants have violated Sections 1 and 2 of the Sherman Act in connection with, among other things, their licensing of 3G and 4G standards essential patents ("SEPs"). The complaint further alleges that the Company defendants have violated their commitment to the ETSI with respect to the licensing of 3G and 4G SEPs on FRAND terms and conditions. The complaint seeks, among other things (i) rulings that the Company defendants have violated Sections 1 and 2 of the Sherman Act and are liable for breach of their ETSI FRAND commitments, (ii) a judgment that the plaintiffs are entitled to a license with respect to the Company's 3G and 4G SEPs on FRAND terms and conditions, and (iii) injunctions against any demand for allegedly excessive royalties or enforcement of the Company defendants' 3G and 4G U.S. SEPs against the plaintiffs or their customers via patent infringement proceedings.

On June 22, 2020, the Company filed a motion to dismiss Lenovo's Sherman Act claims with prejudice, and to dismiss Lenovo's breach of contract claim with leave to re-file as a counterclaim in the Company's legal proceeding against Lenovo in the Delaware District Court discussed above. Oral argument on the Company's motion to dismiss was held on October 27, 2020.

On March 24, 2021, the Delaware District Court ruled on the Company’s motion to dismiss. The Delaware District Court dismissed the Sherman Act Section 1 claim without prejudice, denied the motion to dismiss the Sherman Act Section 2 claim, and consolidated the Section 2 and breach of contract claims with Company’s patent proceeding against Lenovo in the Delaware District Court discussed above.

China Proceeding

On April 10, 2020, Lenovo (Beijing) Ltd. and certain of its affiliates filed a complaint against the Company and certain of its subsidiaries in the Beijing Intellectual Property Court (Beijing IP Court) seeking a determination of the FRAND royalty rates payable for the Company's Chinese 3G, 4G and 5G SEPs. On February 20, 2021, the Company filed an application challenging the jurisdiction of the Beijing IP Court to take up Lenovo’s complaint. The jurisdictional challenge remains pending.

Xiaomi

As a result of the license agreement between the Company and a subsidiary of Xiaomi Corporation ("Xiaomi"), the parties have ceased all activity in each of the disputes described below and will be taking timely action to formally withdraw all claims.

China Proceeding

On August 5, 2020, Xiaomi informed the Company that certain of its affiliates filed a complaint in the Wuhan Intermediate People's Court (the "Wuhan Court") seeking a determination of a global FRAND rate for a license to the Company's 3G and/or 4G/LTE SEPs. The Company was informed that the Wuhan Court held an ex parte hearing on or about September 23, 2020 and issued an order that enjoins the Company from seeking an injunction against Xiaomi and certain of its subsidiaries for infringement of certain of the Company's 3G and/or 4G/LTE SEPs on threat of a fine of up to one million yuan per day for violating that order.

On September 30, 2020, the Company filed a response seeking reconsideration of the anti-suit injunction, which was denied. The Company challenged that decision at the Supreme People's Court of the People's Republic of China, but that challenge was also denied.

The Wuhan Court held two evidentiary hearings in April and June 2021. On July 29, 2021, the Wuhan Court held the first of multiple substantive hearings during which the parties presented their respective claims, defenses and evidence.

India Proceeding

On July 29, 2020, the Company and certain of its subsidiaries filed two patent infringement actions in the Delhi High Court (the "Delhi High Court") against Xiaomi and certain of its subsidiaries. The first complaint alleges infringement of five of the Company's patents related to 3G and/or 4G/LTE standards: Indian Patent Nos. 262910; 295912; 298719; 313036; and 320182. The second complaint alleges infringement of three of the Company's patents related to H.265/HEVC standards: Indian Patent Nos. 242248; 299448; and 308108.

On September 29, 2020, the Company filed an anti-anti-suit injunction application against Xiaomi in the Delhi High Court seeking to enjoin Xiaomi from enforcing the Wuhan Court's anti-suit injunction order described above. On October 9, 2020, the Delhi High Court granted the Company's motion and issued an ad interim injunction. On May 3, 2021, the interim anti-anti-suit injunction was made permanent for the duration of the Indian cellular case.

On June 4, 2021, Xiaomi filed responses to the two complaints (cellular and H.265/HEVC), which included counterclaims seeking invalidation of the patents in the respective suits. The Company filed its replies on July 5, 2021.

German Proceeding

On October 30, 2020, the Company filed an anti-anti-suit injunction application against Xiaomi in the Munich District Court, seeking to enjoin Xiaomi from pursuing the Wuhan Court's anti-suit injunction order described above with respect to Germany. On November 11, 2020, the Munich District Court granted the Company's motion and issued an ex parte injunction restraining Xiaomi from enforcing the anti-suit injunction. Xiaomi opposed the injunction and requested a stay of enforcement. On January 28, 2021, the Munich District Court dismissed the request for stay of enforcement. On February 25, 2021 the Munich District Court confirmed its earlier ex parte anti-anti-suit injunction against Xiaomi. Xiaomi appealed the decision to the Higher Regional Court Munich.

On April 27, 2021, the Company was informed that the Munich Regional Court commenced service of three patent infringement actions filed against Xiaomi and certain of its subsidiaries by a subsidiary of the Company. The complaints involve infringement of the Company's German 3G and/or 4G/LTE patents (Patent Nos. EP 2,421,318; EP 2,485,558; and EP 3,355,537).

OTHER

We are party to certain other disputes and legal actions in the ordinary course of business, including legal proceedings with licensees regarding the terms of their agreements and the negotiation thereof. We do not currently believe that these matters, even if adversely adjudicated or settled, would have a material adverse effect on our financial condition, results of operations or cash flows. None of the preceding matters have met the requirements for accrual or disclosure of a potential range as of September 30, 2021.

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Cash, Concentration of Credit Risk and Fair Value of Financial Instruments

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

CASH, CONCENTRATION OF CREDIT RISK AND FAIR VALUE OF FINANCIAL INSTRUMENTS

CASH, CONCENTRATION OF CREDIT RISK AND FAIR VALUE OF FINANCIAL INSTRUMENTS

Cash, Cash Equivalents and Restricted Cash

Cash, cash equivalents and restricted cash currently consists of money market and demand accounts. The following table provides a reconciliation of total cash, cash equivalents and restricted cash as of September 30, 2021, December 31, 2020 and September 30, 2020 to the captions within the condensed consolidated balance sheets and condensed consolidated statements of cash flows (in thousands):

	September 30,		December 31,		September 30,
	2021		2020		2020
Cash and cash equivalents	$	467,606	$	473,474	$	746,561
Restricted cash included within prepaid and other current assets	1,300		3,108		4,401
Restricted cash included within other non-current assets	1,081		1,081		1,081
Total cash, cash equivalents and restricted cash	$	469,987	$	477,663	$	752,043

Concentration of Credit Risk and Fair Value of Financial Instruments

Financial instruments that potentially subject us to concentration of credit risk consist primarily of cash equivalents, short-term investments, and accounts receivable. We place our cash equivalents and short-term investments only in highly rated financial instruments and in United States government instruments.

Our accounts receivable and contract assets are derived principally from patent license and technology solutions agreements. As of September 30, 2021 two licensees comprised 93% and as of December 31, 2020 five licensees comprised 53%, respectively, of our net accounts receivable balance. We perform ongoing credit evaluations of our licensees, who generally include large, multinational, wireless telecommunications equipment manufacturers. We believe that the book values of our financial instruments approximate their fair values.

Fair Value Measurements

We use various valuation techniques and assumptions when measuring the fair value of our assets and liabilities. We utilize market data or assumptions that market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. This guidance established a hierarchy that prioritizes fair value measurements based on the types of input used for the various valuation techniques (market approach, income approach and cost approach). The levels of the hierarchy are described below:

Level 1 Inputs — Level 1 includes financial instruments for which quoted market prices for identical instruments are available in active markets.

Level 2 Inputs — Level 2 includes financial instruments for which there are inputs other than quoted prices included within Level 1 that are observable for the instrument such as quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets with insufficient volume or infrequent transactions (less active markets) or model-driven valuations in which significant inputs are observable or can be derived principally from, or corroborated by, observable market data, including market interest rate curves, referenced credit spreads and pre-payment rates.

Level 3 Inputs — Level 3 includes financial instruments for which fair value is derived from valuation techniques including pricing models and discounted cash flow models in which one or more significant inputs are unobservable, including the Company’s own assumptions. The pricing models incorporate transaction details such as contractual terms, maturity and, in certain instances, timing and amount of future cash flows, as well as assumptions related to liquidity and credit valuation adjustments of marketplace participants.

Our assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of financial assets and financial liabilities and their placement within the fair value hierarchy. We use quoted market prices for similar assets to estimate the fair value of our Level 2 investments.

Recurring Fair Value Measurements

Our financial assets are generally included within short-term investments on our condensed consolidated balance sheets, unless otherwise indicated. Our financial assets and liabilities that are accounted for at fair value on a recurring basis are presented in the tables below as of September 30, 2021 and December 31, 2020 (in thousands):

	Fair Value as of September 30, 2021
	Level 1		Level 2		Level 3		Total
Assets:
Money market and demand accounts (a)	$	469,987	$	—	$	—	$	469,987
Commercial paper (b)	—		254,688		—		254,688
U.S. government securities	—		129,017		—		129,017
Corporate bonds, asset backed and other securities	—		49,495		—		49,495
Total	$	469,987	$	433,200	$	—	$	903,187

	Fair Value as of December 31, 2020
	Level 1		Level 2		Level 3		Total
Assets:
Money market and demand accounts (a)	$	397,522	$	—	$	—	$	397,522
Commercial paper(b)	—		285,242		—		285,242
U.S. government securities	—		166,223		—		166,223
Corporate bonds, asset backed and other securities	—		81,849		—		81,849
Total	$	397,522	$	533,314	$	—	$	930,836

______________________________

(a)Primarily included within cash and cash equivalents.

(b)As of September 30, 2021 and December 31, 2020, $0.0 million and $80.1 million, respectively, of commercial paper was included within cash and cash equivalents.

Non-Recurring Fair Value Measurements

Investments in Other Entities

During second quarter 2021, we recognized a $1.0 million unrealized gain resulting from observable price changes of one of our long-term strategic investments, which was included within “Other (expense) income, net” in the condensed consolidated statement of income.

During first quarter 2020, we recognized a $5.5 million unrealized gain resulting from observable price changes of one of our long-term strategic investments, which was included within “Other (expense) income, net” in the condensed consolidated statement of income.

Lease Assets

During first quarter 2020, we recognized a $1.1 million impairment, comprised of $0.8 million of Property, Plant, and Equipment, and $0.3 million of Right of Use Asset related to the abandonment of one of our leased properties, which was included within “Operating Expenses” in the condensed consolidated statement of income.

Patents

During second quarter 2021, Convida approved a plan to sell certain patent assets, which were classified as held-for sale. This resulted in an impairment of $11.0 million and was included within restructuring activities as more fully discussed below. The patents held for sale are recorded at fair value on September 30, 2021 and are included within "Prepaid and other current assets" in the condensed consolidated balance sheet.

Fair Value of Long-Term Debt

2024 Notes

The principal amount, carrying value and related estimated fair value of the Company's senior convertible debt reported in the condensed consolidated balance sheets as of September 30, 2021 and December 31, 2020 was as follows (in thousands). The aggregate fair value of the principal amount of the senior convertible long-term debt is a Level 2 fair value measurement.

	September 30, 2021						December 31, 2020
	Principal Amount		Carrying Value		Fair Value		Principal Amount		Carrying Value		Fair Value
Senior Convertible Long-Term Debt	$	400,000	$	395,217	$	432,000	$	400,000	$	343,821	$	418,760

Technicolor Patent Acquisition Long-term Debt

The carrying value and related estimated fair value of the Technicolor Patent Acquisition long-term debt reported in the condensed consolidated balance sheets as of September 30, 2021 and December 31, 2020 was as follows (in thousands). The aggregate fair value of the Technicolor Patent Acquisition long-term debt is a Level 3 fair value measurement.

	September 30, 2021				December 31, 2020
	Carrying Value		Fair Value		Carrying Value		Fair Value
Technicolor Patent Acquisition Long-Term Debt	$	26,203	$	33,192	$	24,171	$	27,016

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Obligations

9 Months Ended

Sep. 30, 2021

Debt Disclosure [Abstract]

OBLIGATIONS

OBLIGATIONS

Technicolor Patent Acquisition Long-Term Debt

On July 30, 2018, we completed our acquisition of the patent licensing business of Technicolor SA ("Technicolor"), a worldwide technology leader in the media and entertainment sector (the "Technicolor Patent Acquisition"). In conjunction with the Technicolor Patent Acquisition we assumed Technicolor’s rights and obligations under a joint licensing program with Sony Corporation ("Sony") relating to digital televisions and standalone computer display monitors, which commenced in 2015 and is referred to as the "Madison Arrangement." An affiliate of CPPIB Credit Investments Inc. ("CPPIB Credit"), a wholly owned subsidiary of Canada Pension Plan Investment Board, is a third-party investor in the Madison Arrangement. CPPIB Credit has made certain payments to Technicolor and Sony and has agreed to contribute cash to fund certain capital reserve obligations under the arrangement in exchange for a percentage of future revenues, specifically through September 11, 2030 in regard to the Technicolor patents.

Upon our assumption of Technicolor’s rights and obligations under the Madison Arrangement, our relationship with CPPIB Credit meets the criteria in ASC 470-10-25 - Sales of Future Revenues or Various Other Measures of Income ("ASC 470"), which relates to cash received from an investor in exchange for a specified percentage or amount of revenue or other measure of income of a particular product line, business segment, trademark, patent, or contractual right for a defined period. Under this guidance, we recognized the fair value of our contingent obligation to CPPIB Credit, as of the acquisition date, as long-term debt in our condensed consolidated balance sheet. This initial fair value measurement was based on the perspective of a market participant and included significant unobservable inputs which are classified as Level 3 inputs within the fair value hierarchy. The fair value of the long-term debt as of September 30, 2021 and December 31, 2020 is disclosed within Note 6, "Cash, Concentration of Credit Risk and Fair Value of Financial Instruments." Our repayment obligations are contingent upon future royalty revenues generated from the Madison Arrangement and there are no minimum or maximum payments under the arrangement.

Under ASC 470, amounts recorded as debt are amortized under the interest method. At each reporting period, we will review the discounted expected future cash flows over the life of the obligation. The Company made an accounting policy election to utilize the catch-up method when there is a change in the estimated future cash flows, whereby we will adjust the carrying amount of the debt to the present value of the revised estimated future cash flows, discounted at the original effective interest rate, with a corresponding adjustment recognized as interest expense within “Interest Expense” in the condensed consolidated statements of income. The effective interest rate as of the acquisition date was approximately 14.5%. This rate represents the discount rate that equates the estimated future cash flows with the fair value of the debt as of the acquisition date, and is used to compute the amount of interest to be recognized each period based on the estimated life of the future revenue streams. During the three and nine months ended September 30, 2021, we recognized $0.4 million and $2.0 million, respectively, of interest expense related to this debt, compared to $0.8 million and $2.3 million during the three and nine months ended September 30, 2020, respectively. This was included within “Interest Expense” in the condensed consolidated statements of income. Any future payments made to CPPIB Credit, or additional proceeds received from CPPIB Credit, will decrease or increase the long-term debt balance accordingly.

2024 Notes, and Related Note Hedge and Warrant Transactions

On June 3, 2019, we issued $400.0 million in aggregate principal amount of 2.00% Senior Convertible Notes due 2024 (the "2024 Notes"). The net proceeds from the issuance of the 2024 Notes, after deducting the initial purchasers' transaction fees and offering expenses, were approximately $391.6 million. The 2024 Notes (i) bear interest at a rate of 2.00% per year, payable in cash on June 1 and December 1 of each year, commencing on December 1, 2019, and (ii) mature on June 1, 2024, unless earlier converted or repurchased. The effective interest rate of the 2024 Notes is 2.02%.

The 2024 Notes are convertible into cash, shares of our common stock or a combination thereof, at our election, at an initial conversion rate of 12.3018 shares of our common stock per $1,000 principal amount of 2024 Notes (which is equivalent to an initial conversion price of approximately $81.29 per share), as adjusted pursuant to the terms of the indenture governing the 2024 Notes (the "Indenture"). The conversion rate of the 2024 Notes, and thus the conversion price, may be adjusted in certain circumstances, including in connection with a conversion of the 2024 Notes made following certain fundamental changes and under other circumstances set forth in the Indenture. As of December 31, 2020, we made the irrevocable election to settle all conversions of the 2024 Notes through combination settlements of cash and shares of our common stock, with a specified dollar amount of $1,000 per $1,000 principal amount of 2024 Notes and any remaining amounts in shares of our common stock.

The 2024 Notes are senior unsecured obligations of the Company and rank equally in right of payment with any of our current and any future senior unsecured indebtedness. The 2024 Notes are effectively subordinated to all of our future secured indebtedness to the extent of the value of the related collateral, and the 2024 Notes are structurally subordinated to indebtedness and other liabilities, including trade payables, of our subsidiaries.

On May 29 and May 31, 2019, in connection with the offering of the 2024 Notes, we entered into convertible note hedge transactions (collectively, the "2024 Note Hedge Transactions") that cover, subject to customary anti-dilution adjustments, approximately 4.9 million shares of common stock, in the aggregate, at a strike price that initially corresponds to the initial conversion price of the 2024 Notes, subject to adjustment, and are exercisable upon any conversion of the 2024 Notes. On May 29 and May 31, 2019, we also entered into privately negotiated warrant transactions (collectively, the "2024 Warrant Transactions" and, together with the 2024 Note Hedge Transactions, the "2024 Call Spread Transactions"), whereby we sold warrants to acquire, subject to customary anti-dilution adjustments, approximately 4.9 million shares of common stock at an initial strike price of approximately $109.43 per share, subject to adjustment.

There have been no material changes regarding the 2024 Notes and 2024 Call Spread Transactions from the disclosures included in Note 10, "Obligations" within the notes to the consolidated financial statements included in Part II, Item 8 of the 2020 Form 10-K.

2020 Notes

On March 11, 2015, we issued $316.0 million in aggregate principal amount of 1.50% Senior Convertible Notes due 2020 (the "2020 Notes"). The 2020 Notes bore interest at a rate of 1.50% per year and matured on March 1, 2020. On the maturity date, the outstanding balance of $94.9 million under the 2020 Notes was repaid in full.

The following table reflects the carrying value of our convertible notes long-term debt as of September 30, 2021 and December 31, 2020 (in thousands):

	September 30, 2021		December 31, 2020
Principal	$	400,000	$	400,000
Less:
Unamortized interest discount(a)	—		(51,567)
Deferred financing costs(a)	(4,783)		(4,612)
Net carrying amount of the 2024 Notes	$	395,217	$	343,821

______________________________

(a)Due to the adoption of ASU 2020-06 on January 1, 2021, the unamortized interest discount was reclassified back to the carrying value of the 2024 Notes. Refer to Note 1, "Basis of Presentation", for further information regarding this adoption.

The following table presents the amount of interest cost recognized, which is included within "Interest Expense" in our condensed consolidated statements of income, for the three and nine months ended September 30, 2021 and 2020 relating to the contractual interest coupon, accretion of the debt discount, and the amortization of deferred financing costs of the 2024 Notes and 2020 Notes (in thousands):

	Three months ended September 30,
	2021		2020
	2024 Notes		2024 Notes		2020 Notes		Total
Contractual coupon interest	$	2,000	$	2,000	$	—	$	2,000
Accretion of debt discount(a)	—		3,323		—		3,323
Amortization of deferred financing costs	411		297		—		297
Total	$	2,411	$	5,620	$	—	$	5,620

	Nine months ended September 30,
	2021		2020
	2024 Notes		2024 Notes		2020 Notes		Total
Contractual coupon interest	$	6,000	$	6,000	$	237	$	6,237
Accretion of debt discount(a)	—		9,800		669		10,469
Amortization of deferred financing costs	1,211		876		70		946
Total	$	7,211	$	16,676	$	976	$	17,652

______________________________

(a)Due to the adoption of ASU 2020-06, there is no longer accretion of the debt discount starting January 1, 2021. Refer to Note 1, "Basis of Presentation", for further information regarding this adoption.

Technicolor Contingent Consideration

As part of the Technicolor Patent Acquisition, we entered into a revenue-sharing arrangement with Technicolor that created a contingent consideration liability. Under the revenue-sharing arrangement, Technicolor receives 42.5% of future cash receipts from new licensing efforts from the Madison Arrangement only, subject to certain conditions and hurdles. As of September 30, 2021, the contingent consideration liability from the revenue-sharing arrangement was deemed not probable and is therefore not reflected within the consolidated financial statements.

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Variable Interest Entities

9 Months Ended

Sep. 30, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

VARIABLE INTEREST ENTITIES

VARIABLE INTEREST ENTITIES

As further discussed below, we are the primary beneficiary of three variable interest entities. As of September 30, 2021, the combined book values of the assets and liabilities associated with these variable interest entities included in our condensed consolidated balance sheet were $37.6 million and $2.9 million, respectively. Assets included $13.3 million of cash and cash equivalents, $6.4 million of accounts receivable and prepaid and other current assets, and $17.9 million of patents, net. As of December 31, 2020, the combined book values of the assets and liabilities associated with these variable interest entities included in our condensed consolidated balance sheet were $62.0 million and $5.8 million, respectively. Assets included $24.5 million of cash and cash equivalents, $2.3 million of accounts receivable and prepaid and other current assets, and $35.2 million of patents, net.

Chordant

On January 31, 2019, we launched the Company’s Chordant™ business as a standalone company. The spinout of the unit, which includes an affiliate of Sony as an investor along with the Company, gave Chordant added independence and flexibility in driving into its core operator and smart city markets. Chordant is a variable interest entity and we have determined that we are the primary beneficiary for accounting purposes and consolidate Chordant.  For the three and nine months ended September 30, 2021, we have allocated approximately $0.0 million and $2.3 million, respectively, of Chordant's net loss to noncontrolling interests held by other parties, and for the three and nine months September 30, 2020, we allocated $0.4 million and $0.9 million, respectively, of Chordant's net loss to noncontrolling interests held by other parties. During second quarter 2021, Chordant began the process of ceasing operations.

Convida Wireless

Convida Wireless was launched in 2013 and most recently renewed in 2018 to combine Sony's consumer electronics expertise with our pioneering IoT expertise to drive IoT communications and connectivity.  Based on the terms of the agreement, the parties contribute funding and resources for additional research and platform development, which we will perform.  SCP IP Investment LLC, an affiliate of Stephens Inc., is a minority investor in Convida Wireless.

Convida Wireless is a variable interest entity. Based on our provision of research and platform development services to Convida Wireless, we have determined that we remain the primary beneficiary for accounting purposes and will continue to consolidate Convida Wireless.  For the three and nine months ended September 30, 2021, we allocated $1.0 million and $8.7 million, respectively, of Convida Wireless's net loss to noncontrolling interests held by other parties and for the three and nine months ended September 30, 2020, we allocated $1.5 million and $4.4 million, respectively.

During second quarter 2021, Convida approved a plan to sell certain patent assets, which were classified as held-for sale. This resulted in an impairment of $11.0 million and was included within restructuring activities as more fully discussed below. The patents held for sale are recorded at fair value on September 30, 2021 and are included within "Prepaid and other current assets" in the condensed consolidated balance sheet.

Signal Trust for Wireless Innovation

During 2013, we announced the establishment of the Signal Trust for Wireless Innovation (the “Trust”), the goal of which was to monetize a patent portfolio primarily related to 3G cellular infrastructure. In response to a request from the Trust, in first quarter 2021 we provided our consent, as major beneficiary, to dissolve the Trust.

The Trust has been accounted for as a variable interest entity. Based on the terms of the trust agreement, we determined that we are the primary beneficiary for accounting purposes and have included the Trust in our consolidated financial statements. Pending the dissolution of the Trust, we will continue to consolidate the Trust in our consolidated financial statements.

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Other (Expense) Income, Net

9 Months Ended

Sep. 30, 2021

Other Income and Expenses [Abstract]

OTHER (EXPENSE) INCOME, NET

OTHER (EXPENSE) INCOME, NET

The amounts included in "Other (expense) income, net" in the condensed consolidated statements of income for the three and nine months ended September 30, 2021 and 2020 were as follows (in thousands):

	Three months ended September 30,				Nine months ended September 30,
	2021		2020		2021		2020
Interest and investment income	$	385	$	825	$	1,384	$	5,044
Other	(1,922)		3,169		842		8,762
Other (expense) income, net	$	(1,537)	$	3,994	$	2,226	$	13,806

Interest and investment income decreased in both the three and nine months ended September 30, 2021, due to reduced rates of return on our short-term investments. Other decreased in the three months ended September 30, 2021, compared to the three months ended September 30, 2020 primarily due to a foreign currency translation loss in the three months ended September 30, 2021, compared to a gain in three months ended September 30, 2020 arising from euro translation of our foreign subsidiaries. The decrease in other in the nine months ended September 30, 2021, compared to the nine months ended September 30, 2020 was primarily driven by a decrease in gains resulting from observable price changes of our long-term strategic investments, which were $5.5 million during the nine months ended September 30, 2020 and $1.0 million during the nine months ended September 30, 2021. This decrease was partially offset by a $1.9 million gain on a contract termination in first quarter 2021.

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Other Assets

9 Months Ended

Sep. 30, 2021

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

OTHER ASSETS

OTHER ASSETS

The amounts included in "Prepaid and other current assets" in the consolidated balance sheet as of September 30, 2021 and December 31, 2020 were as follows (in thousands):

			As Reported		As Revised (a)
	September 30, 2021		December 31, 2020		December 31, 2020
Tax receivables	$	49,734	$	69,592	$	45,262
Prepaid assets	8,520		10,899		10,899
Patents held for sale	6,228		—		—
Receivable from sale of long-term investments	3,016		—		—
Operating lease receivable	64		817		817
Other current assets	12,742		2,916		2,916
Total Prepaid and other current assets	$	80,304	$	84,224	$	59,894

The amounts included in "Other non-current assets, net" in the consolidated balance sheet as of September 30, 2021 and December 31, 2020 were as follows (in thousands):

			As Reported		As Revised (a)
	September 30, 2021		December 31, 2020		December 31, 2020
Tax receivables	$	29,969	$	—	$	24,330
Goodwill	22,421		22,421		22,421
Right-of-use assets	18,871		22,456		22,456
Long-term investments	14,580		15,489		15,489
Other non-current assets	11,115		13,677		13,677
Total Other non-current assets, net	$	96,956	$	74,043	$	98,373

_____________________________

(a)As discussed in Note 1, we revised our prior period presentation of "Prepaid and other current assets" and "Other non-current assets, net". This column represents the effect of the revision on the consolidated balance sheet.

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Restructuring Activities

9 Months Ended

Sep. 30, 2021

Restructuring and Related Activities [Abstract]

RESTRUCTURING ACTIVITIES

RESTRUCTURING ACTIVITIES

During second quarter 2021, the Company began the process of a strategic review and undertook certain actions in order to increase focus on core technologies and markets.

On June 10, 2021, the Company announced that, as a result of a strategic review of its research and innovation priorities, it commenced the process of a collective economic layoff in which it proposed a reduction in force of 66 positions in its research and innovation unit, 60 of which are based in France. The Company launched an information-consultation process with respect to the contemplated reorganization with the works council of certain of its French subsidiaries, as required by French law. On September 28, 2021, the Company finalized an agreement with the representative trade unions of certain of its French subsidiaries to commence the reorganization of the research and innovation unit located in France as part of the reduction in force. This agreement was validated by the Regional Director of Economy, Employment, Labor and Solidarity on October 25, 2021. The majority of termination notices will be issued during the remainder of 2021.

During June 2021, Chordant began the process of ceasing operations. The Company implemented a reduction in workforce action in second quarter 2021, consisting of 18 employees.

Additionally, in June 2021, Convida approved a plan to sell certain patents. The proceeds from the sale of these patents will contribute to funding Convida's operations. These assets were evaluated as a separate asset group and reclassified as assets held for sale. Upon the reclassification, the patents to be sold are recorded at fair value, which resulted in the Company recognizing an $11.0 million impairment during the three months ended June 30, 2021. We determined the fair value based upon evaluation of market conditions. The patents held for sale are included within "Prepaid and other current assets" in the consolidated balance sheet.

Restructuring charges are estimated based on information available at the time such charges are recorded. Due to the inherent uncertainty involved in estimating restructuring expenses, actual amounts incurred for such activities may differ from amounts initially estimated. The Company may also incur additional costs not currently contemplated due to events that may occur as a result of, or that are associated with, the reduction in force or other restructuring activities.

The restructuring charges associated with the above activities totaling $7.0 million and $20.3 million in the three and nine months ended September 30, 2021, respectively, are presented net of any reimbursement arrangements and include $0.1 million and $1.2 million of outside services and other associated costs related to non-recurring consultant and legal fees in the three and nine months ended September 30, 2021. We expect additional charges to be recorded in fourth quarter 2021.

As of September 30, 2021, the Company's restructuring liability was $17.8 million, of which $6.9 million was included in "Other accrued expenses" and $10.9 million was included in "Other long-term liabilities" on our condensed consolidated balance sheet. The following table presents the change in our restructuring liability during the period (in thousands):

Balance as of March 31, 2021	$	—
Accrual	12,285
Cash payments	(628)
Balance as of June 30, 2021	$	11,657
Accrual	7,033
Cash payments	(859)
Balance as of September 30, 2021	$	17,831

The restructuring expenses included in "Restructuring activities" in the condensed consolidated statements of income for the three and nine months ended September 30, 2021 were as follows (in thousands):

	Three months ended September 30, 2021		Nine months ended September 30, 2021
Patent impairment	$	—	$	11,000
Severance and other benefits	6,998		18,084
Outside services and other associated costs	47		1,246
Reimbursement arrangements	—		(10,040)
Total	$	7,045	$	20,290

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Basis of Presentation (Policies)

9 Months Ended

Sep. 30, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

The accompanying unaudited, condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and, accordingly, do not include all of the detailed schedules, information and notes necessary to state fairly the financial condition, results of operations and cash flows in conformity with United States generally accepted accounting principles (“GAAP”). The year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by GAAP for year-end financial statements. Therefore, these financial statements should be read in conjunction with the financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020 (our “2020 Form 10-K”) as filed with the Securities and Exchange Commission (“SEC”) on February 18, 2021. Definitions of capitalized terms not defined herein appear within our 2020 Form 10-K. The results of operations for interim periods are not necessarily indicative of the results to be expected for the entire year. We have one reportable segment.

Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the date of the financial statements, as well as the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates.

Reclassifications

Certain reclassifications have been made to prior year amounts to conform to the current year presentation.

New Accounting Guidance

Accounting Standards Update: Simplifying the Accounting for Income Taxes

In December 2019, the FASB issued ASU No. 2019-12, "Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes" ("ASU 2019-12"). The amendments in this ASU are intended to simplify various aspects related to accounting for income taxes. ASU 2019-12 removes certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve consistent application. ASU 2019-12 is effective for fiscal years beginning after December 15, 2020 with early adoption allowed. We adopted this guidance as of January 1, 2021 and the adoption did not have a material impact on our consolidated financial statements.

Accounting Standards Update: Simplifying the Accounting for Convertible Instruments

In August 2020, the FASB issued ASU No. 2020-06, “Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity” (“ASU 2020-06”). The amendments in this ASU are intended to simplify accounting for convertible debt instruments and convertible preferred stock by removing certain accounting models which separate the embedded conversion features from the host contract. ASU 2020-06 also amends certain guidance in ASC 260 on the computation of earnings per share for convertible instruments and contracts on an entity’s own equity. ASU 2020-06 is effective for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years, and early adoption is permitted for fiscal years beginning after December 15, 2020. This update permits the use of either the modified retrospective or fully retrospective methods of transition. We elected to early adopt this standard on a modified retrospective approach as of January 1, 2021.

This adoption increased long-term debt by $50.2 million at January 1, 2021, which was comprised of $51.6 million of unamortized interest discount and was partially offset by a net increase of $1.4 million equity component of deferred financing costs. This was due to the standard no longer requiring bifurcation of the embedded conversion feature from the host contract on the 2024 Notes, as defined in Note 7, "Obligations." This adoption also reduced non-cash interest expense starting in 2021 due to the removal of the accretion of the debt discount on the 2024 Notes.

Lastly, the adoption requires the use of the if-converted method of calculating diluted earnings per share rather than the treasury stock method for convertible instruments and requires the inclusion of the potential effect of shares settled in cash or shares in the diluted earnings per share calculation. Due to the reduction in non-cash interest expense, this adoption increased both basic and diluted earnings per share by $0.09 in the three months ended September 30, 2021 and $0.26 in the nine months ended September 30, 2021.

Accounting Standards Update: Issuer’s Accounting for Certain Modifications or Exchanges of Freestanding Equity Classified Written Call Options

In May 2021, the FASB issued ASU No. 2021-04. The amendments in this ASU are intended to clarify and reduce diversity in an issuer’s accounting for modifications or exchanges of freestanding equity-classified written call options, including warrants, that remain equity classified after modification or exchange. ASU 2021-04 is effective for fiscal years beginning after December 15, 2021, with early adoption allowed. The Company is currently evaluating the anticipated impact of the adoption of ASU 2021-04 on its consolidated financial statements.

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Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of supplemental cash flow information

The following table presents additional supplemental cash flow information for the nine months ended September 30, 2021 and 2020 (in thousands):

	FOR THE NINE MONTHS ENDED SEPTEMBER 30,
SUPPLEMENTAL CASH FLOW INFORMATION:	2021		2020
Interest paid	$	4,000	$	4,712
Income taxes paid, including foreign withholding taxes	9,835		18,211
Non-cash investing and financing activities:
Dividend payable	10,740		10,782
Non-cash acquisition of patents	—		33,300
Accrued capitalized patent costs and property and equipment	3,690		(419)
Unsettled repurchase of common stock	499		—

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Revenue (Tables)

9 Months Ended

Sep. 30, 2021

Revenue from Contract with Customer [Abstract]

Schedule of disaggregation of revenue

The following table presents the disaggregation of our revenue for the three and nine months ended September 30, 2021 and 2020 (in thousands):

	Three months ended September 30,
	2021		2020		Increase/(Decrease)
Variable patent royalty revenue	$	8,346	$	7,377	$	969	13	%
Fixed-fee royalty revenue	84,295		77,338		6,957		9	%
Current patent royalties a	92,641		84,715		7,926		9	%
Non-current patent royalties b	50,108		507		49,601		9,783	%
Total patent royalties	142,749		85,222		57,527		68	%
Current technology solutions revenue a	747		2,271		(1,524)		(67)	%
Total revenue	$	143,496	$	87,493	$	56,003	64	%

	Nine months ended September 30,
	2021		2020		Increase/(Decrease)
Variable patent royalty revenue	$	22,765	$	17,920	$	4,845	27	%
Fixed-fee royalty revenue	222,887		221,023		1,864		1	%
Current patent royalties a	245,652		238,943		6,709		3	%
Non-current patent royalties b	63,475		20,461		43,014		210	%
Total patent royalties	309,127		259,404		49,723		19	%
Current technology solutions revenue a	4,467		8,797		(4,330)		(49)	%
Total revenue	$	313,594	$	268,201	$	45,393	17	%

a.    Recurring revenues are comprised of current patent royalties, inclusive of dynamic fixed-fee royalty payments, and current technology solutions revenue.

b.    Non-recurring revenues are comprised of non-current patent royalties, which include past patent royalties and royalties from static agreements, as well as patent sales.

Schedule of contracted revenue

Based on contracts signed and committed as of September 30, 2021, we expect to recognize the following revenue from dynamic fixed-fee royalty payments over the term of such contracts (in thousands):

	Revenue
Remainder 2021	$	89,541
2022	299,307
2023	104,469
2024	60,089
2025 and beyond	60,000
Total Revenue	$	613,406

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Net Income (Loss) Per Share (Tables)

9 Months Ended

Sep. 30, 2021

Earnings Per Share [Abstract]

Schedule of numerator and the denominator of the basic and diluted

The following tables reconcile the numerator and the denominator of the basic and diluted net income per share computation (in thousands, except for per share data):

	Three months ended September 30,				Nine months ended September 30,
	2021		2020		2021		2020
Net income applicable to InterDigital, Inc.	$	26,228	$	23,784	$	33,417	$	46,151
Weighted-average shares outstanding:
Basic	30,737		30,804		30,792		30,762
Dilutive effect of stock options, RSUs, convertible securities and warrants	694		315		480		267
Diluted	31,431		31,119		31,272		31,029
Earnings per share:
Basic	$	0.85	$	0.77	$	1.09	$	1.50
Dilutive effect of stock options, RSUs, convertible securities and warrants	(0.02)		(0.01)		(0.02)		(0.01)
Diluted	$	0.83	$	0.76	$	1.07	$	1.49

Schedule of excluded from our computation of EPS

Set forth below are the securities and the weighted average number of shares of common stock underlying such securities that were excluded from our computation of EPS for the periods presented (in thousands):

	Three months ended September 30,		Nine months ended September 30,
	2021	2020	2021	2020
Restricted stock units and stock options	441	156	289	154
Convertible securities(a)	—	4,921	—	5,222
Warrants	4,921	5,319	4,921	5,931
Total	5,362	10,396	5,210	11,307

______________________________

(a)As of December 31, 2020, we made the irrevocable election to settle all conversions of the 2024 Notes through combination settlements of cash and shares of our common stock, with a specified dollar amount of $1,000 per $1,000 principal amount of 2024 Notes and any remaining amounts in shares of our common stock.

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Cash, Concentration of Credit Risk and Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

Schedule of cash and cash equivalents

The following table provides a reconciliation of total cash, cash equivalents and restricted cash as of September 30, 2021, December 31, 2020 and September 30, 2020 to the captions within the condensed consolidated balance sheets and condensed consolidated statements of cash flows (in thousands):

	September 30,		December 31,		September 30,
	2021		2020		2020
Cash and cash equivalents	$	467,606	$	473,474	$	746,561
Restricted cash included within prepaid and other current assets	1,300		3,108		4,401
Restricted cash included within other non-current assets	1,081		1,081		1,081
Total cash, cash equivalents and restricted cash	$	469,987	$	477,663	$	752,043

Schedule of restricted cash and cash equivalents

The following table provides a reconciliation of total cash, cash equivalents and restricted cash as of September 30, 2021, December 31, 2020 and September 30, 2020 to the captions within the condensed consolidated balance sheets and condensed consolidated statements of cash flows (in thousands):

	September 30,		December 31,		September 30,
	2021		2020		2020
Cash and cash equivalents	$	467,606	$	473,474	$	746,561
Restricted cash included within prepaid and other current assets	1,300		3,108		4,401
Restricted cash included within other non-current assets	1,081		1,081		1,081
Total cash, cash equivalents and restricted cash	$	469,987	$	477,663	$	752,043

Schedule of fair value on a recurring basis

Our financial assets and liabilities that are accounted for at fair value on a recurring basis are presented in the tables below as of September 30, 2021 and December 31, 2020 (in thousands):

	Fair Value as of September 30, 2021
	Level 1		Level 2		Level 3		Total
Assets:
Money market and demand accounts (a)	$	469,987	$	—	$	—	$	469,987
Commercial paper (b)	—		254,688		—		254,688
U.S. government securities	—		129,017		—		129,017
Corporate bonds, asset backed and other securities	—		49,495		—		49,495
Total	$	469,987	$	433,200	$	—	$	903,187

	Fair Value as of December 31, 2020
	Level 1		Level 2		Level 3		Total
Assets:
Money market and demand accounts (a)	$	397,522	$	—	$	—	$	397,522
Commercial paper(b)	—		285,242		—		285,242
U.S. government securities	—		166,223		—		166,223
Corporate bonds, asset backed and other securities	—		81,849		—		81,849
Total	$	397,522	$	533,314	$	—	$	930,836

______________________________

(a)Primarily included within cash and cash equivalents.

(b)As of September 30, 2021 and December 31, 2020, $0.0 million and $80.1 million, respectively, of commercial paper was included within cash and cash equivalents.

Schedule of aggregate fair value

The aggregate fair value of the principal amount of the senior convertible long-term debt is a Level 2 fair value measurement.

	September 30, 2021						December 31, 2020
	Principal Amount		Carrying Value		Fair Value		Principal Amount		Carrying Value		Fair Value
Senior Convertible Long-Term Debt	$	400,000	$	395,217	$	432,000	$	400,000	$	343,821	$	418,760

The aggregate fair value of the Technicolor Patent Acquisition long-term debt is a Level 3 fair value measurement.

	September 30, 2021				December 31, 2020
	Carrying Value		Fair Value		Carrying Value		Fair Value
Technicolor Patent Acquisition Long-Term Debt	$	26,203	$	33,192	$	24,171	$	27,016

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Obligations (Tables)

9 Months Ended

Sep. 30, 2021

Debt Disclosure [Abstract]

Schedule of carrying value of the 2024 Notes and 2020 Notes

The following table reflects the carrying value of our convertible notes long-term debt as of September 30, 2021 and December 31, 2020 (in thousands):

	September 30, 2021		December 31, 2020
Principal	$	400,000	$	400,000
Less:
Unamortized interest discount(a)	—		(51,567)
Deferred financing costs(a)	(4,783)		(4,612)
Net carrying amount of the 2024 Notes	$	395,217	$	343,821

______________________________

(a)Due to the adoption of ASU 2020-06 on January 1, 2021, the unamortized interest discount was reclassified back to the carrying value of the 2024 Notes. Refer to Note 1, "Basis of Presentation", for further information regarding this adoption.

Schedule of accretion of the debt discount, and the amortization of financing costs

The following table presents the amount of interest cost recognized, which is included within "Interest Expense" in our condensed consolidated statements of income, for the three and nine months ended September 30, 2021 and 2020 relating to the contractual interest coupon, accretion of the debt discount, and the amortization of deferred financing costs of the 2024 Notes and 2020 Notes (in thousands):

	Three months ended September 30,
	2021		2020
	2024 Notes		2024 Notes		2020 Notes		Total
Contractual coupon interest	$	2,000	$	2,000	$	—	$	2,000
Accretion of debt discount(a)	—		3,323		—		3,323
Amortization of deferred financing costs	411		297		—		297
Total	$	2,411	$	5,620	$	—	$	5,620

	Nine months ended September 30,
	2021		2020
	2024 Notes		2024 Notes		2020 Notes		Total
Contractual coupon interest	$	6,000	$	6,000	$	237	$	6,237
Accretion of debt discount(a)	—		9,800		669		10,469
Amortization of deferred financing costs	1,211		876		70		946
Total	$	7,211	$	16,676	$	976	$	17,652

______________________________

(a)Due to the adoption of ASU 2020-06, there is no longer accretion of the debt discount starting January 1, 2021. Refer to Note 1, "Basis of Presentation", for further information regarding this adoption.

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Other (Expense) Income, Net (Tables)

9 Months Ended

Sep. 30, 2021

Other Income and Expenses [Abstract]

Schedule of other income expense, net

The amounts included in "Other (expense) income, net" in the condensed consolidated statements of income for the three and nine months ended September 30, 2021 and 2020 were as follows (in thousands):

	Three months ended September 30,				Nine months ended September 30,
	2021		2020		2021		2020
Interest and investment income	$	385	$	825	$	1,384	$	5,044
Other	(1,922)		3,169		842		8,762
Other (expense) income, net	$	(1,537)	$	3,994	$	2,226	$	13,806

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Other Assets (Tables)

9 Months Ended

Sep. 30, 2021

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Schedule of Prepaid and Other Current Assets

The amounts included in "Prepaid and other current assets" in the consolidated balance sheet as of September 30, 2021 and December 31, 2020 were as follows (in thousands):

			As Reported		As Revised (a)
	September 30, 2021		December 31, 2020		December 31, 2020
Tax receivables	$	49,734	$	69,592	$	45,262
Prepaid assets	8,520		10,899		10,899
Patents held for sale	6,228		—		—
Receivable from sale of long-term investments	3,016		—		—
Operating lease receivable	64		817		817
Other current assets	12,742		2,916		2,916
Total Prepaid and other current assets	$	80,304	$	84,224	$	59,894

Schedule of Other Assets, Noncurrent

The amounts included in "Other non-current assets, net" in the consolidated balance sheet as of September 30, 2021 and December 31, 2020 were as follows (in thousands):

			As Reported		As Revised (a)
	September 30, 2021		December 31, 2020		December 31, 2020
Tax receivables	$	29,969	$	—	$	24,330
Goodwill	22,421		22,421		22,421
Right-of-use assets	18,871		22,456		22,456
Long-term investments	14,580		15,489		15,489
Other non-current assets	11,115		13,677		13,677
Total Other non-current assets, net	$	96,956	$	74,043	$	98,373

_____________________________

(a)As discussed in Note 1, we revised our prior period presentation of "Prepaid and other current assets" and "Other non-current assets, net". This column represents the effect of the revision on the consolidated balance sheet.

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Restructuring Activities (Tables)

9 Months Ended

Sep. 30, 2021

Restructuring and Related Activities [Abstract]

Schedule of Restructuring Reserve by Type of Cost

The following table presents the change in our restructuring liability during the period (in thousands):

Balance as of March 31, 2021	$	—
Accrual	12,285
Cash payments	(628)
Balance as of June 30, 2021	$	11,657
Accrual	7,033
Cash payments	(859)
Balance as of September 30, 2021	$	17,831

The restructuring expenses included in "Restructuring activities" in the condensed consolidated statements of income for the three and nine months ended September 30, 2021 were as follows (in thousands):

	Three months ended September 30, 2021		Nine months ended September 30, 2021
Patent impairment	$	—	$	11,000
Severance and other benefits	6,998		18,084
Outside services and other associated costs	47		1,246
Reimbursement arrangements	—		(10,040)
Total	$	7,045	$	20,290

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Basis of Presentation - Narrative (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($) $ / shares	Sep. 30, 2020 $ / shares	Sep. 30, 2021 USD ($) segment $ / shares	Sep. 30, 2020 $ / shares	Jan. 01, 2021 USD ($)	Dec. 31, 2020 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments | segment			1
Error in accounting (as a percent)	1.50%		1.50%
Debt Instrument [Line Items]
Net income per common share: basic (in USD per share) | $ / shares	$ 0.85	$ 0.77	$ 1.09	$ 1.50
Accounting Standards Update 2020-06
Debt Instrument [Line Items]
Net income per common share: basic (in USD per share) | $ / shares	$ 0.09		$ 0.26
Senior Convertible Long-Term Debt
Debt Instrument [Line Items]
Unamortized discount	$ 0		$ 0			$ 51,567
Senior Convertible Long-Term Debt | Accounting Standards Update 2020-06
Debt Instrument [Line Items]
Long-term debt					$ (50,200)
Unamortized discount					51,600
Debt issuance costs equity component					$ 1,400

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Basis of Presentation - Schedule of Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid	$ 4,000	$ 4,712
Income taxes paid, including foreign withholding taxes	9,835	18,211
Non-cash investing and financing activities:
Dividend payable	10,740	10,782	$ 10,786
Non-cash acquisition of patents	0	33,300
Accrued capitalized patent costs and property and equipment	3,690	(419)
Unsettled repurchase of common stock	$ 499	$ 0

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Revenue - Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 143,496	$ 87,493	$ 313,594	$ 268,201
Increase/(decrease) in disaggregated revenue	$ 56,003		$ 45,393
Percentage increase/(decrease) in disaggregated revenue	64.00%		17.00%
Total patent royalties
Disaggregation of Revenue [Line Items]
Revenue	$ 142,749	85,222	$ 309,127	259,404
Increase/(decrease) in disaggregated revenue	$ 57,527		$ 49,723
Percentage increase/(decrease) in disaggregated revenue	68.00%		19.00%
Total patent royalties | Current revenue
Disaggregation of Revenue [Line Items]
Revenue	$ 92,641	84,715	$ 245,652	238,943
Increase/(decrease) in disaggregated revenue	$ 7,926		$ 6,709
Percentage increase/(decrease) in disaggregated revenue	9.00%		3.00%
Total patent royalties | Non-current revenue
Disaggregation of Revenue [Line Items]
Revenue	$ 50,108	507	$ 63,475	20,461
Increase/(decrease) in disaggregated revenue	$ 49,601		$ 43,014
Percentage increase/(decrease) in disaggregated revenue	9783.00%		210.00%
Technology solutions
Disaggregation of Revenue [Line Items]
Revenue	$ 747	2,271	$ 4,467	8,797
Increase/(decrease) in disaggregated revenue	$ (1,524)		$ (4,330)
Percentage increase/(decrease) in disaggregated revenue	(67.00%)		(49.00%)
Variable patent royalty revenue
Disaggregation of Revenue [Line Items]
Revenue	$ 8,346	7,377	$ 22,765	17,920
Increase/(decrease) in disaggregated revenue	$ 969		$ 4,845
Percentage increase/(decrease) in disaggregated revenue	13.00%		27.00%
Fixed-fee royalty revenue
Disaggregation of Revenue [Line Items]
Revenue	$ 84,295	$ 77,338	$ 222,887	$ 221,023
Increase/(decrease) in disaggregated revenue	$ 6,957		$ 1,864
Percentage increase/(decrease) in disaggregated revenue	9.00%		1.00%

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Revenue - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Revenue recognized that had been included in deferred revenue as of the beginning of the period	$ 186.9
Contract assets, current	20.5	$ 9.7
Contract assets, non-current	$ 8.7	$ 8.9

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Revenue - Remaining Performance Obligation (Details) $ in Thousands	Sep. 30, 2021 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 89,541
Revenue, remaining performance obligation, expected timing of satisfaction, period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 299,307
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 104,469
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 60,089
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 60,000
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 613,406
Revenue, remaining performance obligation, expected timing of satisfaction, period

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Income Taxes (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Income Tax Contingency [Line Items]
Effective tax rate	21.30%	(16.80%)
Effective tax rate before valuation allowance is included (as percent)	8.40%	(31.30%)
Discrete tax expense (benefit)	$ 300	$ 18,200
Reasonably possible decrease in unrecognized tax benefits	1,100
Income taxes paid, including foreign withholding taxes	9,835	18,211
Foreign Country
Income Tax Contingency [Line Items]
Income taxes paid, including foreign withholding taxes	$ 8,900	$ 17,800

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Net Income (Loss) Per Share - Numerator and Denominator of Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net income applicable to InterDigital, Inc.	$ 26,228	$ 1,618	$ 5,571	$ 23,784	$ 22,251	$ 116	$ 33,417	$ 46,151
Weighted-average shares outstanding:
Weighted-average shares outstanding: basic (in shares)	30,737			30,804			30,792	30,762
Dilutive effect of stock options, RSUs, convertible securities and warrants (in shares)	694			315			480	267
Weighted-average shares outstanding: diluted (in shares)	31,431			31,119			31,272	31,029
Earnings per share:
Net income per common share: basic (in USD per share)	$ 0.85			$ 0.77			$ 1.09	$ 1.50
Dilutive effect of stock options, RSUs, convertible securities and warrants (in USD per share)	0.02			0.01			0.02	0.01
Net income per common share: diluted (in USD per share)	$ 0.83			$ 0.76			$ 1.07	$ 1.49

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Net Income (Loss) Per Share - Antidilutive Securities Excluded from Earnings Per Share (Details) - USD ($) shares in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 03, 2019	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)		5,362	10,396	5,210	11,307
Convertible Notes 2024 | Senior Convertible Long-Term Debt
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Debt conversion converted instrument amount	$ 1,000					$ 1,000
Restricted stock units and stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)		441	156	289	154
Convertible securities
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)		0	4,921	0	5,222
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)		4,921	5,319	4,921	5,931

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Litigation and Legal Proceedings (Details)	Apr. 27, 2021 patent	Aug. 05, 2020 CNY (¥)	Jul. 29, 2020 patent	Aug. 28, 2019 patent	Aug. 27, 2019 patent
Xiaomi
Loss Contingencies [Line Items]
Court fine per day | ¥		¥ 1,000,000
Pending Litigation | U.K. Proceedings
Loss Contingencies [Line Items]
Loss contingency, number of patents alleged infringement					5
Pending Litigation | District Of Delaware Proceedings
Loss Contingencies [Line Items]
Loss contingency, number of patents alleged infringement				8
Pending Litigation | India Proceedings
Loss Contingencies [Line Items]
Loss contingency, number of patents alleged infringement			2
Pending Litigation | India Proceedings One
Loss Contingencies [Line Items]
Loss contingency, number of patents alleged infringement			5
Pending Litigation | India Proceedings Two
Loss Contingencies [Line Items]
Loss contingency, number of patents alleged infringement			3
Pending Litigation | German Proceedings
Loss Contingencies [Line Items]
Loss contingency, number of patents alleged infringement	3

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Cash, Concentration of Credit Risk and Fair Value of Financial Instruments - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Cash and cash equivalents	$ 467,606	$ 473,474	$ 746,561
Restricted cash included within prepaid and other current assets	1,300	3,108	4,401
Restricted cash included within other non-current assets	1,081	1,081	1,081
Total cash, cash equivalents and restricted cash	$ 469,987	$ 477,663	$ 752,043	$ 757,098

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Cash, Concentration of Credit Risk and Fair Value of Financial Instruments - Narrative (Details) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2020	Mar. 31, 2021 property
Concentration Risk [Line Items]
Unrealized gain		$ 1,000	$ 5,500
Lease asset impairment			1,100
Lease property, plant and equipment impairment			800
Lease right of use asset impairment			$ 300
Number of abandoned leased properties | property							1
Impairment of Patents held for sale	$ 0			$ 11,000	$ 0
Accounts Receivable | Licensee Concentration Risk | Five Largest Licensees
Concentration Risk [Line Items]
Accounts receivable percentage				93.00%		53.00%

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Cash, Concentration of Credit Risk and Fair Value of Financial Instruments - Fair Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Assets:
Total	$ 903,187	$ 930,836
Amount of commercial paper included in cash and cash equivalents	467,606	473,474	$ 746,561
U.S. government securities
Assets:
Securities	129,017	166,223
Corporate bonds, asset backed and other securities
Assets:
Securities	49,495	81,849
Money market and demand accounts
Assets:
Cash and cash equivalents	469,987	397,522
Commercial Paper
Assets:
Cash and cash equivalents	254,688	285,242
Amount of commercial paper included in cash and cash equivalents	0	80,100
Level 1
Assets:
Total	469,987	397,522
Level 1 | U.S. government securities
Assets:
Securities	0	0
Level 1 | Corporate bonds, asset backed and other securities
Assets:
Securities	0	0
Level 1 | Money market and demand accounts
Assets:
Cash and cash equivalents	469,987	397,522
Level 1 | Commercial Paper
Assets:
Cash and cash equivalents	0	0
Level 2
Assets:
Total	433,200	533,314
Level 2 | U.S. government securities
Assets:
Securities	129,017	166,223
Level 2 | Corporate bonds, asset backed and other securities
Assets:
Securities	49,495	81,849
Level 2 | Money market and demand accounts
Assets:
Cash and cash equivalents	0	0
Level 2 | Commercial Paper
Assets:
Cash and cash equivalents	254,688	285,242
Level 3
Assets:
Total	0	0
Level 3 | U.S. government securities
Assets:
Securities	0	0
Level 3 | Corporate bonds, asset backed and other securities
Assets:
Securities	0	0
Level 3 | Money market and demand accounts
Assets:
Cash and cash equivalents	0	0
Level 3 | Commercial Paper
Assets:
Cash and cash equivalents	$ 0	$ 0

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Cash, Concentration of Credit Risk and Fair Value of Financial Instruments - Fair Value of Long-Term Debt (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Technicolor Patent Acquisition Long-Term Debt
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Carrying Value	$ 26,203,000	$ 24,171,000
Fair Value	33,192,000	27,016,000
Senior Convertible Long-Term Debt
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Principal	400,000,000	400,000,000
Carrying Value	395,217,000	343,821,000
Fair Value	$ 432,000,000	$ 418,760,000

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Obligations - Technicolor Patent Acquisition Long-Term Debt (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Business Acquisition [Line Items]
Interest debt expense		$ 5,620		$ 17,652
Technicolor
Business Acquisition [Line Items]
Effective interest rate acquisition percentage	14.50%		14.50%
Interest debt expense	$ 400	$ 800	$ 2,000	$ 2,300

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Obligations - 2024 and 2020 Senior Convertible Notes, and Related Note Hedge and Warrant Transactions (Details) $ / shares in Units, shares in Millions			9 Months Ended		12 Months Ended
	Mar. 01, 2020 USD ($)	Jun. 03, 2019 USD ($) $ / shares	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	May 31, 2019 $ / shares shares	Mar. 11, 2015 USD ($)
Debt Instrument [Line Items]
Initial strike price (in USD per share) | $ / shares						$ 109.43
Payments on long-term debt			$ 0	$ 94,909,000
Convertible Notes 2020
Debt Instrument [Line Items]
Payments on long-term debt	$ 94,900,000
Convertible Debt | Convertible Notes 2024
Debt Instrument [Line Items]
Aggregate principal amount		$ 400,000,000
Debt instrument interest rate, stated percentage		2.00%
Transaction fees and offering expenses		$ 391,600,000
Debt instrument interest rate, effective percentage			2.02%
Initial conversion rate		12.3018
Debt conversion converted instrument amount		$ 1,000			$ 1,000
Initial conversion price (in USD per share) | $ / shares		$ 81.29
Convertible note hedge (in shares) | shares						4.9
Anti-dilution adjustments of common stock (in shares) | shares						4.9
Convertible Debt | Convertible Notes 2020
Debt Instrument [Line Items]
Aggregate principal amount							$ 316,000,000
Debt instrument interest rate, stated percentage							1.50%

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Obligations - Carrying Value of 2024 Notes and 2020 Notes (Details) - Convertible Debt - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Principal	$ 400,000,000	$ 400,000,000
Less:
Unamortized interest discount	0	(51,567,000)
Deferred financing costs	(4,783,000)	(4,612,000)
Net carrying amount of the 2024 Notes	$ 395,217,000	$ 343,821,000

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Obligations - Accretion of Debt Discount and Amortization of Financing Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Debt Instrument [Line Items]
Contractual coupon interest		$ 2,000		$ 6,237
Accretion of debt discount(a)		3,323		10,469
Amortization of deferred financing costs		297		946
Total		5,620		17,652
Convertible Debt | Convertible Notes 2024
Debt Instrument [Line Items]
Contractual coupon interest	$ 2,000	2,000	$ 6,000	6,000
Accretion of debt discount(a)	0	3,323	0	9,800
Amortization of deferred financing costs	411	297	1,211	876
Total	$ 2,411	5,620	$ 7,211	16,676
Convertible Debt | Convertible Notes 2020
Debt Instrument [Line Items]
Contractual coupon interest		0		237
Accretion of debt discount(a)		0		669
Amortization of deferred financing costs		0		70
Total		$ 0		$ 976

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Obligations - Additional Information (Details)	May 31, 2019
Technicolor
Business Acquisition [Line Items]
Receive future cash receipts percentage	42.50%

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Variable Interest Entities (Details) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Sep. 30, 2021 USD ($) variable_interest_entity	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Variable Interest Entity [Line Items]
Assets	$ 1,700,612						$ 1,700,612		$ 1,616,275
Liabilities	965,295						965,295		819,709
Cash and cash equivalents	467,606			$ 746,561			467,606	$ 746,561	473,474
Patents, net	371,857						371,857		418,343
Accounts receivable	141,657						141,657		16,008
Noncontrolling interests	(1,014)	$ (8,415)	$ (1,613)	(1,882)	$ (1,660)	$ (1,777)	(11,042)	(5,319)
Chordant
Variable Interest Entity [Line Items]
Noncontrolling interests	0			400			(2,300)	900
Convida
Variable Interest Entity [Line Items]
Noncontrolling interests	(1,000)			(8,700)			$ (1,000)	(8,700)
Other Parties
Variable Interest Entity [Line Items]
Noncontrolling interests				$ 1,500				$ 4,400
Primary Beneficiary
Variable Interest Entity [Line Items]
Number of variable interest entities | variable_interest_entity							3
Assets	37,600						$ 37,600		62,000
Liabilities	2,900						2,900		5,800
Cash and cash equivalents	13,300						13,300		24,500
Accounts receivable and prepaid assets	6,400						6,400
Patents, net	$ 17,900						$ 17,900		35,200
Accounts receivable									$ 2,300

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Other (Expense) Income, Net - Other Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Income and Expenses [Abstract]
Interest and investment income	$ 385	$ 825	$ 1,384	$ 5,044
Other	(1,922)	3,169	842	8,762
Other (expense) income, net	$ (1,537)	$ 3,994	$ 2,226	$ 13,806

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Other (Expense) Income, Net - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Mar. 31, 2021	Sep. 30, 2021	Sep. 30, 2020
Other Income and Expenses [Abstract]
Gain from observable price changes in orderly transactions of a long-term strategic investment	$ 1.9	$ 1.0	$ 5.5

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Other Assets - Prepaid and Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Current Assets [Line Items]
Tax receivables	$ 49,734	$ 45,262
Prepaid assets	8,520	10,899
Patents held for sale	6,228	0
Receivable from sale of long-term investments	3,016	0
Operating lease receivable	64	817
Other current assets	12,742	2,916
Total Prepaid and other current assets	$ 80,304	59,894
As Reported
Other Current Assets [Line Items]
Tax receivables		69,592
Prepaid assets		10,899
Patents held for sale		0
Receivable from sale of long-term investments		0
Operating lease receivable		817
Other current assets		2,916
Total Prepaid and other current assets		$ 84,224

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Other Assets - Other Non-Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Non-Current Assets [Line Items]
Tax receivables	$ 29,969	$ 24,330
Goodwill	22,421	22,421
Right-of-use assets	18,871	22,456
Long-term investments	14,580	15,489
Other non-current assets	11,115	13,677
Other Assets, Noncurrent, Total	$ 96,956	98,373
As Reported
Other Non-Current Assets [Line Items]
Tax receivables		0
Goodwill		22,421
Right-of-use assets		22,456
Long-term investments		15,489
Other non-current assets		13,677
Other Assets, Noncurrent, Total		$ 74,043

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Restructuring Activities - Narrative (Details) $ in Thousands	3 Months Ended			7 Months Ended	9 Months Ended
	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($) employee	Sep. 30, 2020 USD ($)	Dec. 31, 2021 employee	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Mar. 31, 2021 USD ($)
Restructuring Cost and Reserve [Line Items]
Patent impairment	$ 0				$ 11,000	$ 0
Restructuring activities	7,045		$ 0		20,290	$ 0
Outside services and other associated costs	47				1,246
Restructuring Reserve	17,831	$ 11,657			17,831		$ 0
Restructuring reserve, current	6,900				6,900
Restructuring reserve, noncurrent	10,900				$ 10,900
Maximum
Restructuring Cost and Reserve [Line Items]
Outside services and other associated costs	$ 100
Chordant Cease of Operations
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | employee		18
Patents
Restructuring Cost and Reserve [Line Items]
Patent impairment		$ 11,000
Forecast | Economic Reduction in Force
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | employee				66
Forecast | FRANCE | Economic Reduction in Force
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | employee				60

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Restructuring Activities - Restructuring Activity Included in Other Accrued Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2021	Jun. 30, 2021
Restructuring Reserve [Roll Forward]
Beginning balance	$ 11,657	$ 0
Accrual	7,033	12,285
Cash payments	(859)	(628)
Ending balance	$ 17,831	$ 11,657

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Restructuring Activities - Restructuring Activity Included in Operating Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Restructuring and Related Activities [Abstract]
Patent impairment	$ 0		$ 11,000	$ 0
Severance and other benefits	6,998		18,084
Outside services and other associated costs	47		1,246
Reimbursement arrangements	0		(10,040)
Total	$ 7,045	$ 0	$ 20,290	$ 0