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	11,148			11,148
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	531
Issuance of stock for ESPP purchase (in shares)		25,033
Issuance of stock for ESPP purchase	150	$ 150
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)		448,772
Stock issued during period (in shares)		5,207,137
Stock issued during period	50,118	$ 50,118
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	1,997	$ 1,997
Ending balance (in shares) at Sep. 30, 2021		45,167,893			12,143,433
Ending balance at Sep. 30, 2021	130,789	$ 313,885	653	(102,016)	$ (81,733)
Beginning balance (in shares) at Jun. 30, 2021		43,252,670			12,143,433
Stockholders' Equity Attributable to Parent, Beginning Balance at Jun. 30, 2021	111,726	$ 299,124	122	(105,787)	$ (81,733)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,771			3,771
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	531		531
Issuance of stock for ESPP purchase (in shares)		9,490
Issuance of stock for ESPP purchase	61	$ 61
Release of restricted stock units and awards (in shares)		8,407
Stock Issued During Period Value Restricted Stock Units And Award Net Of Forfeitures	0
Stock issued during period (in shares)		1,897,326
Stock issued during period	14,285	$ 14,285
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	415	$ 415
Ending balance (in shares) at Sep. 30, 2021		45,167,893			12,143,433
Ending balance at Sep. 30, 2021	130,789	$ 313,885	653	(102,016)	$ (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	10,962			10,962
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	(469)		(469)
Stock repurchase (in shares)					2,174,793
Treasury Stock, Value, Acquired, Cost Method	(11,281)				$ (11,281)
Issuance of stock for ESPP purchase (in shares)		11,416
Issuance of stock for ESPP purchase	51	$ 51
Release of restricted stock units and awards (in shares)		344,944			28,317
Stock Issued During Period Value Restricted Stock Units And Award Net Of Forfeitures	(154)				$ (154)
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	2,661	$ 2,661
Ending balance (in shares) at Sep. 30, 2022		46,907,075			14,346,543
Ending balance at Sep. 30, 2022	143,154	$ 326,097	(57)	(89,718)	$ (93,168)
Beginning balance (in shares) at Jun. 30, 2022		46,851,509			13,378,528
Stockholders' Equity Attributable to Parent, Beginning Balance at Jun. 30, 2022	139,737	$ 325,351	(401)	(97,423)	$ (87,790)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,705			7,705
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	344		344
Stock repurchase (in shares)					954,247
Treasury Stock, Value, Acquired, Cost Method	(5,304)				$ (5,304)
Issuance of stock for ESPP purchase (in shares)		3,691
Issuance of stock for ESPP purchase	16	$ 16
Release of restricted stock units and awards (in shares)		51,875			13,768
Stock Issued During Period Value Restricted Stock Units And Award Net Of Forfeitures	(74)				$ (74)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	730	$ 730
Ending balance (in shares) at Sep. 30, 2022		46,907,075			14,346,543
Ending balance at Sep. 30, 2022	$ 143,154	$ 326,097	$ (57)	$ (89,718)	$ (93,168)