CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Operating activities
Net income (loss)		$ (81,697)	$ (56,514)	$ (52,934)
Less: Income (loss) from discontinued operations, net of tax		(616)	0	0
Income (loss) from continuing operations		(81,081)	(56,514)	(52,934)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization of property, equipment and software		17,121	27,889	43,401
Amortization of acquired intangible assets		1,481	3,011	7,817
Stock-based compensation		37,774	26,734	14,481
(Gain) loss from changes in fair value of investments		0	0	25,751
Deferred income taxes		(2,932)	4,496	1,735
Foreign currency (gains) losses, net		(21,452)	30,036	(5,105)
Foreign VAT assessments		0	8,692	0
(Gain) on sale of assets		0	(5,160)	0
(Gain) on sale of business		(10,650)	0	0
(Gain) on sale of investment		(5,998)	0	0
Loss on extinguishment of debt		99,925	1,631	0
Change in assets and liabilities:
Accounts receivable		3,009	15,276	(4,482)
Prepaid expenses and other current assets		(4,319)	18,598	21,364
Right-of-use assets - operating leases		3,443	2,525	9,747
Accounts payable		(2,980)	(3,637)	(44,594)
Accrued merchant and supplier payables		32,845	(9,694)	(18,286)
Accrued expenses and other current liabilities		8,486	(7,047)	(37,851)
Operating lease obligations		(3,831)	(6,144)	(27,149)
Payment for early lease termination		0	(2,155)	(9,724)
Other, net		(6,343)	7,357	(2,156)
Net cash provided by (used in) operating activities from continuing operations		64,498	55,894	(77,985)
Net cash provided by (used in) operating activities from discontinued operations		0	0	0
Net cash provided by (used in) operating activities		64,498	55,894	(77,985)
Investing activities
Purchases of property and equipment and capitalized software		(14,624)	(15,333)	(19,285)
Proceeds from sale of assets, net		0	9,116	1,489
Proceeds from sale of business, net		15,049	0	0
Proceeds from sale or divestment of investment		5,998	0	18,924
Acquisitions of intangible assets and other investing activities		0	(595)	(2,525)
Net cash provided by (used in) investing activities from continuing operations		6,423	(6,812)	(1,397)
Net cash provided by (used in) investing activities from discontinued operations		0	0	0
Net cash provided by (used in) investing activities		6,423	(6,812)	(1,397)
Financing activities
Payments of borrowings under revolving credit agreement		0	(42,776)	(32,224)
Proceeds from issuance of 2027 Notes		0	19,950	0
Proceeds from Rights Offering, net of issuance costs		0	79,619	0
Taxes paid related to net share settlements of stock-based compensation awards		(6,188)	(2,332)	(3,299)
Proceeds from settlement of Capped Call Transactions		2,732	0	0
Distributions to noncontrolling interest holders		(1,887)	(2,596)	(2,540)
Other financing activities		129	(372)	2,373
Net cash provided by (used in) financing activities		(7,510)	47,790	(35,690)
Effect of exchange rate changes on cash, cash equivalents and restricted cash		(368)	(1,941)	1,014
Net increase (decrease) in cash, cash equivalents and restricted cash		63,043	94,931	(114,058)
Less: Net increase (decrease) in cash classified within current assets of discontinued operations		0	0	0
Net increase (decrease) in cash, cash equivalents and restricted cash		63,043	94,931	(114,058)
Cash, cash equivalents and restricted cash, beginning of period	[1]	262,569	167,638	281,696
Cash, cash equivalents and restricted cash, end of period	[1]	325,612	262,569	167,638
6.25% Convertible Senior Notes Due 2027
Financing activities
Issuance costs for notes		0	(3,703)	0
2030 Notes, due June 30, 2030
Financing activities
Issuance costs for notes		$ (2,296)	$ 0	$ 0

[1] The following table provides a reconciliation of cash, cash equivalents and restricted cash shown above to amounts reported within the Consolidated Balance Sheets as of December 31, 2025, 2024 and 2023 (in thousands): December 31, 202520242023Cash and cash equivalents$296,080 $228,843 $141,563 Restricted cash included in prepaid expenses and other current assets29,532 33,726 26,075 Cash, cash equivalents and restricted cash$325,612 $262,569 $167,638  Year Ended December 31,202520242023 Supplemental disclosure of cash flow information Cash activity: Cash paid for interest$14,678 $3,366 $6,624  Income tax payments (2) 36,771 15,511 7,904 Cash paid for amounts included in the measurement of operating lease liabilities3,984 5,508 26,686  Non-cash investing activity: Right-of-use assets obtained in exchange for operating lease liabilities3,301 6,456 973 Increase (decrease) in liabilities related to purchases of property and equipment and capitalized software (127)356 (1,770) Non-cash financing activity: Exchanged 2026 Notes(20,000)(176,260)—  Exchanged 2027 Notes (150,000)— — Issuance of the 2027 Notes in exchange for 2026 Notes— 176,260 —  Issuance of the 2030 Notes in exchange for 2026 Notes and 2027 Notes 244,071 — —