Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2020		64,283,000
Beginning balance at Dec. 31, 2020	$ 170,103	$ 6	$ 536,516	$ (366,419)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)	422,964	423,000
Exercise of stock options	$ 2,700		2,700
Release of stock awards (in shares)		181,000
Employee stock-based compensation	8,360		8,360
Non-employee stock-based compensation	187		187
Taxes paid related to net share settlement of equity awards (in shares)		(54,000)
Taxes paid related to net share settlement of equity awards	(1,206)		(1,206)
Net income (loss)	(11,089)			(11,089)
Ending balance (in shares) at Sep. 30, 2021		64,833,000
Ending balance at Sep. 30, 2021	169,055	$ 6	546,557	(377,508)
Beginning balance (in shares) at Jun. 30, 2021		64,623,000
Beginning balance at Jun. 30, 2021	162,773	$ 6	542,519	(379,752)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		210,000
Exercise of stock options	1,022		1,022
Employee stock-based compensation	2,955		2,955
Non-employee stock-based compensation	61		61
Net income (loss)	2,244			2,244
Ending balance (in shares) at Sep. 30, 2021		64,833,000
Ending balance at Sep. 30, 2021	169,055	$ 6	546,557	(377,508)
Beginning balance (in shares) at Dec. 31, 2021		65,109,000
Beginning balance at Dec. 31, 2021	$ 164,391	$ 6	552,083	(387,698)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)	252,100	252,000
Exercise of stock options	$ 612		612
Release of stock awards (in shares)		332,000
Employee stock-based compensation	11,467		11,467
Non-employee stock-based compensation	133		133
Taxes paid related to net share settlement of equity awards (in shares)		(80,000)
Taxes paid related to net share settlement of equity awards	(1,484)		(1,484)
Net income (loss)	(20,988)			(20,988)
Ending balance (in shares) at Sep. 30, 2022		65,613,000
Ending balance at Sep. 30, 2022	154,131	$ 6	562,811	(408,686)
Beginning balance (in shares) at Jun. 30, 2022		65,494,000
Beginning balance at Jun. 30, 2022	159,459	$ 6	558,147	(398,694)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		77,000
Exercise of stock options	180		180
Release of stock awards (in shares)		47,000
Employee stock-based compensation	4,516		4,516
Non-employee stock-based compensation	15		15
Taxes paid related to net share settlement of equity awards (in shares)		(5,000)
Taxes paid related to net share settlement of equity awards	(47)		(47)
Net income (loss)	(9,992)			(9,992)
Ending balance (in shares) at Sep. 30, 2022		65,613,000
Ending balance at Sep. 30, 2022	$ 154,131	$ 6	$ 562,811	$ (408,686)