CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Common Stock and Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	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	7,377			7,377
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	0
Issuance of stock for ESPP purchase (in shares)		15,543
Issuance of stock for ESPP purchase	89	$ 89
Exercise of stock options, net of shares withheld for employee taxes (in shares)		325,737
Exercise of stock options, net of shares withheld for employee taxes	2,864	$ 2,864
Release of restricted stock units and awards (in shares)		440,365
Stock issued during period (in shares)		3,309,811
Stock issued during period	35,833	$ 35,833
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	1,582	$ 1,582
Ending balance (in shares) at Jun. 30, 2021		43,252,670			12,143,433
Ending balance at Jun. 30, 2021	111,726	$ 299,124	122	(105,787)	$ (81,733)
Beginning balance (in shares) at Mar. 31, 2021		43,020,610			12,143,433
Stockholders' Equity Attributable to Parent, Beginning Balance at Mar. 31, 2021	105,298	$ 298,037	122	(111,128)	$ (81,733)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,341			5,341
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)		18,750
Exercise of stock options, net of shares withheld for employee taxes	140	$ 140
Release of restricted stock units and awards (in shares)		213,310
Stock Issued During Period Value Restricted Stock Units And Award Net Of Forfeitures	0
Stock issued during period	(104)	$ (104)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	1,051	$ 1,051
Ending balance (in shares) at Jun. 30, 2021		43,252,670			12,143,433
Ending balance at Jun. 30, 2021	111,726	$ 299,124	122	(105,787)	$ (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	3,257			3,257
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	(813)		(813)
Stock repurchase (in shares)					1,220,546
Treasury Stock, Value, Acquired, Cost Method	(5,977)				$ (5,977)
Issuance of stock for ESPP purchase (in shares)		7,725
Issuance of stock for ESPP purchase	34	$ 34
Release of restricted stock units and awards (in shares)		293,069			14,549
Stock Issued During Period Value Restricted Stock Units And Award Net Of Forfeitures	(80)				$ (80)
Shares issued to an employee in lieu of cash compensation (in shares)		16,517
Shares issued to an employee in lieu of cash compensation	84	$ 84
Stock issued during period	5	5
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	1,932	$ 1,932
Ending balance (in shares) at Jun. 30, 2022		46,851,509			13,378,528
Ending balance at Jun. 30, 2022	139,737	$ 325,351	(401)	(97,423)	$ (87,790)
Beginning balance (in shares) at Mar. 31, 2022		46,658,734			13,082,214
Stockholders' Equity Attributable to Parent, Beginning Balance at Mar. 31, 2022	143,350	$ 324,476	653	(95,604)	$ (86,175)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(1,819)			(1,819)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	$ (1,054)		(1,054)
Stock repurchase (in shares)	281,765				281,765
Treasury Stock, Value, Acquired, Cost Method	$ (1,535)				$ (1,535)
Release of restricted stock units and awards (in shares)		176,258			14,549
Stock Issued During Period Value Restricted Stock Units And Award Net Of Forfeitures	(80)				$ (80)
Shares issued to an employee in lieu of cash compensation (in shares)		16,517
Shares issued to an employee in lieu of cash compensation	84	$ 84
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	791	$ 791
Ending balance (in shares) at Jun. 30, 2022		46,851,509			13,378,528
Ending balance at Jun. 30, 2022	$ 139,737	$ 325,351	$ (401)	$ (97,423)	$ (87,790)