Consolidated Statements of Stockholders' (Deficit) Equity - USD ($) $ in Thousands	Common stock	Additional paid-in capital	Accumulated other comprehensive income (loss)	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)	82
Exercise of stock options		152			152
Exercise of stock options (in shares)	22,585
Foreign currency translation adjustment			(10)		(10)
Stock-based compensation expense		2,106			2,106
Stock-based compensation expense (in shares)	12,000
Reclassification of liability-classified stock-based compensation awards		82			82
Net loss				(16,391)	(16,391)
Balance at Ending period at Jun. 30, 2021	$ 14	248,076	(81)	(213,044)	34,965
Balance at Ending period (in shares) at Jun. 30, 2021	14,471,774
Balance at Beginning of period at Mar. 31, 2021	$ 14	246,548	(82)	(204,789)	41,691
Balance at Beginning of period (in shares) at Mar. 31, 2021	14,440,275
Vesting of common stock previously subject to repurchase (in shares)	36
Exercise of stock options		116			116
Exercise of stock options (in shares)	19,463
Foreign currency translation adjustment			1		1
Stock-based compensation expense		1,412			1,412
Stock-based compensation expense (in shares)	12,000
Net loss				(8,255)	(8,255)
Balance at Ending period at Jun. 30, 2021	$ 14	248,076	(81)	(213,044)	34,965
Balance at Ending period (in shares) at Jun. 30, 2021	14,471,774
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)	29
Exercise of stock options		12			$ 12
Exercise of stock options (in shares)	40,872				1,964
Shares withheld for employee taxes		(153)			$ (153)
Shares withheld for employee taxes (in shares)	(12,918)
Foreign currency translation adjustment			181		181
Stock-based compensation expense		1,923			1,923
Net loss				(23,603)	(23,603)
Balance at Ending period at Jun. 30, 2022	$ 15	251,846	129	(253,532)	(1,542)
Balance at Ending period (in shares) at Jun. 30, 2022	14,557,560
Balance at Beginning of period at Mar. 31, 2022	$ 15	250,819	(5)	(240,791)	10,038
Balance at Beginning of period (in shares) at Mar. 31, 2022	14,556,748
Vesting of common stock previously subject to repurchase (in shares)	2
Exercise of stock options		5			5
Exercise of stock options (in shares)	810
Foreign currency translation adjustment			134		134
Stock-based compensation expense		1,022			1,022
Net loss				(12,741)	(12,741)
Balance at Ending period at Jun. 30, 2022	$ 15	$ 251,846	$ 129	$ (253,532)	$ (1,542)
Balance at Ending period (in shares) at Jun. 30, 2022	14,557,560