CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net loss	$ (22,538)	$ (20,963)	$ (12,528)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,710	3,112	6,023
Stock-based compensation expense	11,214	2,839	846
Change in fair value of deferred acquisition consideration	0	427	134
Provision for transaction losses, returns and refunds	781	701	810
Amortization of costs to obtain revenue contracts	310	447	487
Amortization of operating lease right-of-use assets	2,541	0	0
Deferred rent	0	(194)	(2,837)
Gain on sale of Design Manager	(9,684)	0	0
Other, net	195	21	(11)
Changes in operating assets and liabilities:
Accounts receivable	(497)	52	(652)
Prepaid expenses and other current assets	31	(1,418)	179
Receivables from payment processors	(323)	910	553
Other assets	(615)	(145)	(163)
Accounts payable and accrued expenses	(5,206)	5,055	2,219
Payables due to sellers	(3,041)	5,732	1,592
Operating lease liabilities	(2,735)	0	0
Other current liabilities and other liabilities	(1,057)	(977)	(95)
Net cash used in operating activities	(27,914)	(4,401)	(3,443)
Cash flows from investing activities:
Development of internal-use software	(1,871)	(2,110)	(1,782)
Proceeds from repayment of notes receivable with related party	0	0	3,112
Purchases of property and equipment	(93)	(129)	(44)
Proceeds from sale of Design Manager	14,611	0	0
Other, net	(6)	(30)	0
Net cash provided by (used in) investing activities	12,641	(2,269)	1,286
Cash flows from financing activities:
Proceeds from issuance of common stock in initial public offering, net of underwriting discounts and commissions	0	122,993	0
Proceeds from exercise of stock options	2,035	2,729	2,010
Payment of deferred acquisition consideration	0	(640)	0
Payment of deferred offering costs	0	(5,032)	(448)
Net cash provided by financing activities	2,035	120,050	1,562
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(278)	(16)	(14)
Net (decrease) increase in cash, cash equivalents, and restricted cash	(13,516)	113,364	(609)
Cash, cash equivalents, and restricted cash at beginning of the period	171,559	58,195	58,804
Cash, cash equivalents, and restricted cash at end of the period	158,043	171,559	58,195
Supplemental disclosure of cash flow information:
Cash paid for income taxes	26	69	11
Cash paid for interest	10	16	14
Supplemental disclosure of non-cash activities:
Accretion of redeemable convertible preferred stock to redemption value	0	7,061	15,095
Conversion of redeemable convertible preferred stock in connection with initial public offering	0	305,586	872
Change in deferred offering costs included in accounts payable and accrued expenses	0	(872)	0
Issuance of common stock for Design Manager acquisition	$ 0	$ 767	$ 0