CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities:
Net loss	$ (9,119)	$ (7,740)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	880	932
Stock-based compensation expense	7,592	7,106
Provision for transaction losses, returns and refunds	294	625
Amortization of operating lease right-of-use assets	1,777	1,661
Accretion of discounts and amortization of premiums on short-term investments, net	(250)	(1,499)
Other, net	(65)	162
Changes in operating assets and liabilities:
Accounts receivable	(305)	(193)
Prepaid expenses and other current assets	(1,261)	(1,271)
Receivables from payment processors	(895)	(633)
Other assets	(406)	(1,181)
Accounts payable and accrued expenses	(1,680)	(3,601)
Payables due to sellers	352	1,611
Operating lease liabilities	(2,031)	(1,394)
Other current liabilities and other liabilities	(122)	(290)
Net cash used in operating activities	(5,239)	(5,705)
Cash flows from investing activities:
Maturities of short-term investments	37,795	49,177
Sales of short-term investments	988	18,667
Purchases of short-term investments	(32,484)	(51,507)
Development of internal-use software	(366)	(797)
Purchases of property and equipment	(83)	(554)
Other, net	0	297
Net cash provided by investing activities	5,850	15,283
Cash flows from financing activities:
Proceeds from exercise of stock options	0	786
Payments for repurchase of common stock	(1,794)	(21,877)
Payments for taxes related to net share settlement of stock-based compensation awards	(1,333)	(1,973)
Net cash used in financing activities	(3,127)	(23,064)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	338	(62)
Net decrease in cash, cash equivalents, and restricted cash	(2,178)	(13,548)
Cash, cash equivalents, and restricted cash at beginning of the period	29,621	40,975
Cash, cash equivalents, and restricted cash at end of the period	27,443	27,427
Supplemental disclosure of non-cash activities:
Recording of right of use asset	698	3,483
Recording of lease liability	$ (698)	$ (3,483)