Consolidated Statement of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2021		69,281
Beginning balance at Dec. 31, 2021	$ 82,423	$ 7	$ 133,662	$ (51,246)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under stock plans, net of shares withheld for employee taxes (in shares)		674
Common stock issued under stock plans, net of shares withheld for employee taxes	0
Stock-based compensation expense	$ 1,281		1,281
Proceeds from exercise of stock options (in shares)	3,863
Proceeds from exercise of stock options	$ 5,563		5,563
Net loss	(4,842)			(4,842)
Ending balance (in shares) at Jun. 30, 2022		73,818
Ending balance at Jun. 30, 2022	84,425	$ 7	140,506	(56,088)
Beginning balance (in shares) at Mar. 31, 2022		73,144
Beginning balance at Mar. 31, 2022	86,871	$ 7	139,783	(52,919)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under stock plans, net of shares withheld for employee taxes (in shares)		674
Common stock issued under stock plans, net of shares withheld for employee taxes	0
Stock-based compensation expense	723		723
Net loss	(3,169)			(3,169)
Ending balance (in shares) at Jun. 30, 2022		73,818
Ending balance at Jun. 30, 2022	$ 84,425	$ 7	140,506	(56,088)
Beginning balance (in shares) at Dec. 31, 2022	75,505	75,505
Beginning balance at Dec. 31, 2022	$ 84,485	$ 7	142,261	(57,783)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under stock plans, net of shares withheld for employee taxes (in shares)		583
Common stock issued under stock plans, net of shares withheld for employee taxes	(57)		(57)
Stock-based compensation expense	1,686		1,686
Proceeds from exercise of stock options (in shares)		0
Proceeds from exercise of stock options	0		0
Net loss	$ (8,194)			(8,194)
Ending balance (in shares) at Jun. 30, 2023	75,505	76,088
Ending balance at Jun. 30, 2023	$ 77,920	$ 7	143,890	(65,977)
Beginning balance (in shares) at Mar. 31, 2023		75,505
Beginning balance at Mar. 31, 2023	81,062	$ 7	143,059	(62,004)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under stock plans, net of shares withheld for employee taxes (in shares)		583
Common stock issued under stock plans, net of shares withheld for employee taxes	(57)		(57)
Stock-based compensation expense	888		888
Net loss	$ (3,973)			(3,973)
Ending balance (in shares) at Jun. 30, 2023	75,505	76,088
Ending balance at Jun. 30, 2023	$ 77,920	$ 7	$ 143,890	$ (65,977)