CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK, REDEEMABLE SERIES A-1 PREFERRED STOCK, CONVERTIBLE AND REDEEMABLE SERIES A-2 PREFERRED STOCK AND STOCKHOLDERS EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Convertible Preferred Stock	Redeemable Series A-1 Preferred Stock	Convertible And Redeemable Series A-2 Preferred Stock	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Notes Receivable from Stockholders	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2017		$ 45,017
Beginning balance, shares at Dec. 31, 2017		69,817
Beginning balance at Dec. 31, 2017	$ 5,601					$ 30,079	$ (24,356)	$ (122)
Beginning balance, shares at Dec. 31, 2017					7,287,495
Net loss	(16,491)						(16,491)
Convertible preferred stock deemed dividend, net of return from holders	(932)					(932)
Convertible preferred stock deemed dividend, net of return from holders	932	$ 932
Conversion of convertible preferred stock into cash	(30,986)	$ (30,986)
Conversion of convertible preferred stock into cash, shares		(48,075)
Conversion of convertible preferred stock into common stock	$ 14,963					14,963
Conversion of convertible preferred stock into common stock, shares		(21,742)
Conversion of convertible preferred stock into common stock		$ (14,963)
Conversion of convertible preferred stock into common stock, shares	674,008				674,008
Issuance of convertible and redeemable preferred stock, net of transaction costs and warrant			$ 105,601
Issuance of convertible and redeemable preferred stock, net of transaction costs and warrant, shares			12,000
Accretion of the redeemable series A-1 preferred stock to redeemable value	$ (3,605)					(3,605)
Accretion of the redeemable series A-1 preferred stock to redeemable value			$ 3,605
Repurchase of common stock	(2,722)					(2,722)
Repurchase of common stock, shares					(277,714)
Repurchase of options	(1,372)					(1,372)
Stock-based compensation	5,794					5,794
Common stock issued	5,664					5,664
Common stock issued, shares					453,982
Ending balance at Dec. 31, 2018			$ 109,206
Ending balance, shares at Dec. 31, 2018			12,000
Ending balance at Dec. 31, 2018	6,900					47,869	(40,847)	(122)
Ending balance, shares at Dec. 31, 2018					8,137,771
Net loss	(23,557)						(23,557)
Accretion of the redeemable series A-1 preferred stock to redeemable value	(19,616)					(19,616)
Accretion of the redeemable series A-1 preferred stock to redeemable value			$ 19,616
Stock-based compensation	4,345					4,345
Common stock issued	$ 5,555					5,555
Common stock issued, shares	42,415				232,336
Collection of notes receivable from stockholders	$ 122							$ 122
Accumulated other comprehensive Income (loss)	(40)								$ (40)
Ending balance at Dec. 31, 2019			$ 128,822
Ending balance, shares at Dec. 31, 2019			12,000	0
Ending balance at Dec. 31, 2019	(26,291)					38,153	(64,404)		(40)
Ending balance, shares at Dec. 31, 2019					8,370,107
Net loss	(57,949)						(57,949)
Issuance of convertible and redeemable preferred stock, net of transaction costs and warrant				$ 152,928
Issuance of convertible and redeemable preferred stock, net of transaction costs and warrant, shares				17,500
Accretion of the redeemable series A-1 preferred stock to redeemable value	(17,601)					(17,601)
Accretion of the redeemable series A-1 preferred stock to redeemable value			$ 17,601
Series A-1 preferred stock deemed dividend			$ 24,341
Series A-1 preferred stock deemed dividend	$ (24,341)					(24,341)
Redemption of the series A-1, shares	(1,786,739)				1,786,739
Temporary equity redemption of the series A-1, shares			(12,000)
Redemption of the series A-1 preferred stock	$ 26,801					26,801
Temporary equity redemption of the series A-1			$ (170,764)
Dividend payment to the series A-2 preferred shareholders	(6,970)			$ (7,000)		(6,970)
Exercise of the series A-1 and A-2 preferred stock warrant	56,312					56,312
Exercise of the series A-1 and A-2 preferred stock warrant, shares					2,534,239
Stock-based compensation	4,849					4,849
Common stock issued	25,383					25,383
Common stock issued, shares					859,227
Issuance of common stock in connection with initial public offering,net of issuance costs of $15.6 million	$ 156,841					156,841
Issuance of common stock in connection with initial public offering, net of issuance costs of $15.6 million, shares					11,500,000
Cancellation of shares	(117,785)				(117,785)
Accumulated other comprehensive Income (loss)	$ 111								111
Ending balance at Dec. 31, 2020				$ 152,928
Ending balance, shares at Dec. 31, 2020			0	17,500
Ending balance at Dec. 31, 2020	$ 137,145					$ 259,427	$ (122,353)		$ 71
Ending balance, shares at Dec. 31, 2020					24,932,527