Consolidated Statements of Stockholders' 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)	118
Vesting of share-based awards and exercise of stock options	$ 1	410			411
Vesting of share-based awards and exercise of stock options (in shares)	54,293
Foreign currency translation adjustment			28		28
Stock-based compensation expense		2,839			2,839
Stock-based compensation expense (in shares)	12,000
Reclassification of liability-classified stock-based compensation awards		82			82
Net loss				(24,657)	(24,657)
Balance at Ending period at Sep. 30, 2021	$ 15	249,067	(43)	(221,310)	27,729
Balance at Ending period (in shares) at Sep. 30, 2021	14,503,518
Balance at Beginning of period at Jun. 30, 2021	$ 14	248,076	(81)	(213,044)	34,965
Balance at Beginning of period (in shares) at Jun. 30, 2021	14,471,774
Vesting of common stock previously subject to repurchase (in shares)	36
Vesting of share-based awards and exercise of stock options	$ 1	258			259
Vesting of share-based awards and exercise of stock options (in shares)	31,708
Foreign currency translation adjustment			38		38
Stock-based compensation expense		733			733
Net loss				(8,266)	(8,266)
Balance at Ending period at Sep. 30, 2021	$ 15	249,067	(43)	(221,310)	27,729
Balance at Ending period (in shares) at Sep. 30, 2021	14,503,518
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
Vesting of share-based awards and exercise of stock options		13			$ 13
Vesting of share-based awards and exercise of stock options (in shares)	42,987				2,204
Shares withheld for employee taxes		(157)			$ (157)
Shares withheld for employee taxes (in shares)	(13,448)
Foreign currency translation adjustment			314		314
Stock-based compensation expense		2,950			2,950
Sale of common stock, net of underwriting discounts, commissions and offering costs	$ 4	34,396			34,400
Sale of common stock, net of underwriting discounts, commissions and offering costs (in shares)	4,600,000
Net loss				(34,317)	(34,317)
Balance at Ending period at Sep. 30, 2022	$ 19	287,266	262	(264,246)	23,301
Balance at Ending period (in shares) at Sep. 30, 2022	19,159,145
Balance at Beginning of period at Jun. 30, 2022	$ 15	251,846	129	(253,532)	(1,542)
Balance at Beginning of period (in shares) at Jun. 30, 2022	14,557,560
Vesting of share-based awards and exercise of stock options		1			1
Vesting of share-based awards and exercise of stock options (in shares)	2,115
Shares withheld for employee taxes		(4)			(4)
Shares withheld for employee taxes (in shares)	(530)
Foreign currency translation adjustment			133		133
Stock-based compensation expense		1,027			1,027
Sale of common stock, net of underwriting discounts, commissions and offering costs	$ 4	34,396			34,400
Sale of common stock, net of underwriting discounts, commissions and offering costs (in shares)	4,600,000
Net loss				(10,714)	(10,714)
Balance at Ending period at Sep. 30, 2022	$ 19	$ 287,266	$ 262	$ (264,246)	$ 23,301
Balance at Ending period (in shares) at Sep. 30, 2022	19,159,145