Consolidated Statements of Stockholders Equity - USD ($) $ in Thousands	Common stock	Additional paid-in capital	Accumulated other comprehensive (loss) income	Accumulated deficit	Total
Balance at Beginning of period at Dec. 31, 2020	$ 14	$ 245,736	$ (71)	$ (196,653)	$ 49,026
Balance at Beginning of period (in shares) at Dec. 31, 2020	14,437,107
Vesting of common stock previously subject to repurchase (in shares)	46
Vesting of share-based awards and exercise of stock options		36			36
Vesting of share-based awards and exercise of stock options (in shares)	3,122
Foreign currency translation adjustment			(11)		(11)
Stock-based compensation expense		694			694
Reclassification of liability-classified stock-based compensation awards		82			82
Net loss				(8,136)	(8,136)
Balance at Ending period at Mar. 31, 2021	$ 14	246,548	(82)	(204,789)	41,691
Balance at Ending period (in shares) at Mar. 31, 2021	14,440,275
Balance at Beginning of period at Dec. 31, 2021	$ 15	250,064	(52)	(229,929)	20,098
Balance at Beginning of period (in shares) at Dec. 31, 2021	14,529,577
Vesting of common stock previously subject to repurchase (in shares)	27
Vesting of share-based awards and exercise of stock options		7			$ 7
Vesting of share-based awards and exercise of stock options (in shares)	40,062				1,154
Shares withheld for employee taxes		(153)			$ (153)
Shares withheld for employee taxes (in shares)	(12,918)
Foreign currency translation adjustment			47		47
Stock-based compensation expense		901			901
Net loss				(10,862)	(10,862)
Balance at Ending period at Mar. 31, 2022	$ 15	$ 250,819	$ (5)	$ (240,791)	$ 10,038
Balance at Ending period (in shares) at Mar. 31, 2022	14,556,748