Consolidated Statements of Changes In Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Balance (in shares) at Dec. 31, 2020		17,679,232
Balance at Dec. 31, 2020	$ 56,880	$ 18	$ 117,097	$ (60,235)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		24,090
Exercise of stock options	396		396
Purchase of capped call	(16,134)		(16,134)
Issuance of common stock in settlement of restricted and performance stock unites, net of shares withheld for employee taxes (in shares)		98,604
Issuance of common stock in settlement of restricted and performance stock units, net of shares withheld for employee taxes	(999)		(999)
Stock-based compensation expense	1,846		1,846
Net loss	(359)			(359)
Net change in unrealized loss on available-for-sale investments	0
Balance (in shares) at Mar. 31, 2021		17,801,926
Balance at Mar. 31, 2021	$ 41,630	$ 18	102,206	(60,594)	0
Balance (in shares) at Dec. 31, 2021	17,995,344	17,995,344
Balance at Dec. 31, 2021	$ 56,569	$ 18	114,724	(58,173)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)	7,459	7,459
Exercise of stock options	$ 151		151
Purchase of capped call	0
Issuance of common stock in settlement of restricted and performance stock unites, net of shares withheld for employee taxes (in shares)		130,146
Issuance of common stock in settlement of restricted and performance stock units, net of shares withheld for employee taxes	(2,450)		(2,450)
Stock-based compensation expense	4,043		4,043
Net loss	(15,142)			(15,142)
Net change in unrealized loss on available-for-sale investments	$ (11)				(11)
Balance (in shares) at Mar. 31, 2022	18,132,949	18,132,949
Balance at Mar. 31, 2022	$ 43,160	$ 18	$ 116,468	$ (73,315)	$ (11)