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, 2019		38,624,784			7,210,456
Stockholders' Equity Attributable to Parent, Beginning Balance at Dec. 31, 2019	$ 83,757	$ 253,289	$ 124	$ (118,565)	$ (51,091)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,401			5,401
Unrealized loss on available-for-sale securities, net of taxes	(2)		(2)
Stock repurchase (in shares)					4,932,977
Treasury Stock, Value, Acquired, Cost Method	(30,642)				$ (30,642)
Exercise of stock options, net of shares withheld for employee taxes (in shares)		75,675
Exercise of stock options, net of shares withheld for employee taxes	577	$ 577
Release of restricted stock units and awards (in shares)		438,199
Release of restricted stock units and awards	0	$ 0
Issuance of stock for ESPP purchase (in shares)		22,556
Issuance of stock for ESPP purchase	134	$ 134
Stock-based compensation	4,756	$ 4,756
Ending balance (in shares) at Dec. 31, 2020		39,161,214			12,143,433
Ending balance at Dec. 31, 2020	63,981	$ 258,756	122	(113,164)	$ (81,733)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	12,484			12,484
Unrealized loss on available-for-sale securities, net of taxes	290		290
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)		477,605
Release of restricted stock units and awards	0
Issuance of stock for ESPP purchase (in shares)		25,033
Issuance of stock for ESPP purchase	150	$ 150
Stock issued during period (in shares)		6,544,609
Stock issued during period	59,188	$ 59,188
Stock-based compensation	2,338	$ 2,338
Ending balance (in shares) at Dec. 31, 2021		46,534,198			12,143,433
Ending balance at Dec. 31, 2021	$ 141,295	$ 323,296	$ 412	$ (100,680)	$ (81,733)