CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Common Stock and Additional Paid-In Capital	Accumulated Other Comprehensive Income	Accumulated Deficit	Treasury Stock
Beginning balance (in shares) at Dec. 31, 2020		39,161,214			12,143,433
Stockholders' Equity Attributable to Parent, Beginning Balance at Dec. 31, 2020	$ 63,981	$ 258,756	$ 122	$ (113,164)	$ (81,733)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,036			2,036
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	0
Exercise of stock options, net of shares withheld for employee taxes (in shares)		306,987
Exercise of stock options, net of shares withheld for employee taxes	2,724	$ 2,724
Release of restricted stock units and awards (in shares)		227,055
Stock Issued During Period Value Restricted Stock Units And Award Net Of Forfeitures	0
Issuance of stock for ESPP purchase (in shares)		15,543
Stock Issued During Period, Value, Employee Stock Purchase Plan	89	$ 89
Stock issued during period (in shares)		3,309,811
Stock issued during period	35,937	$ 35,937
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	531	$ 531
Ending balance (in shares) at Mar. 31, 2021		43,020,610			12,143,433
Ending balance at Mar. 31, 2021	105,298	$ 298,037	122	(111,128)	$ (81,733)
Beginning balance (in shares) at Dec. 31, 2021		46,534,198			12,143,433
Stockholders' Equity Attributable to Parent, Beginning Balance at Dec. 31, 2021	141,295	$ 323,296	412	(100,680)	$ (81,733)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,076			5,076
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	$ 241		241
Stock repurchase (in shares)	34,282				938,781
Treasury Stock, Value, Acquired, Cost Method	$ (4,442)				$ (4,442)
Release of restricted stock units and awards (in shares)		116,811
Stock Issued During Period Value Restricted Stock Units And Award Net Of Forfeitures	0
Issuance of stock for ESPP purchase (in shares)		7,725
Stock Issued During Period, Value, Employee Stock Purchase Plan	34	$ 34
Stock issued during period	5	5
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	1,141	$ 1,141
Ending balance (in shares) at Mar. 31, 2022		46,658,734			13,082,214
Ending balance at Mar. 31, 2022	$ 143,350	$ 324,476	$ 653	$ (95,604)	$ (86,175)