CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - 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, 2021		46,534,198			12,143,433
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
Unrealized gain (loss) on available-for-sale securities, net of taxes	(469)		(469)
Stock repurchases (in shares)					2,174,793
Stock repurchases	(11,281)				$ (11,281)
Release of restricted stock units and awards, net of shares withheld (in shares)		344,944			28,317
Release of restricted stock units and awards, net of shares withheld	(154)				$ (154)
Issuance of stock for ESPP purchase (in shares)		11,416
Issuance of stock for ESPP purchase	51	$ 51
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
Shares issued in connection with public offering, net of issuance costs	5	5
Stock-based compensation	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
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
Unrealized gain (loss) on available-for-sale securities, net of taxes	344		344
Stock repurchases (in shares)					954,247
Stock repurchases	(5,304)				$ (5,304)
Release of restricted stock units and awards, net of shares withheld (in shares)		51,875			13,768
Release of restricted stock units and awards, net of shares withheld	(74)				$ (74)
Issuance of stock for ESPP purchase (in shares)		3,691
Issuance of stock for ESPP purchase	16	$ 16
Stock-based compensation	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)
Beginning balance (in shares) at Dec. 31, 2022		46,974,598			14,727,582
Beginning balance at Dec. 31, 2022	157,700	$ 322,714	202	(70,016)	$ (95,200)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	17,986			17,986
Unrealized gain (loss) on available-for-sale securities, net of taxes	993		993
Stock repurchases (in shares)					898,757
Stock repurchases	(6,180)				$ (6,180)
Release of restricted stock units and awards, net of shares withheld (in shares)		508,344			140,701
Release of restricted stock units and awards, net of shares withheld	(1,099)				$ (1,099)
Proceeds from stock options exercises (in shares)		21,222
Proceeds from stock options exercises	160	$ 160
Issuance of stock for ESPP purchase (in shares)		1,298
Issuance of stock for ESPP purchase	6	$ 6
Shares issued to an employee in lieu of cash compensation (in shares)		72,803
Shares issued to an employee in lieu of cash compensation	538	$ 538
Dividend declared	(3,197)	(3,197)
Stock-based compensation	2,526	$ 2,526
Ending balance (in shares) at Sep. 30, 2023		47,578,265			15,767,040
Ending balance at Sep. 30, 2023	169,433	$ 322,747	1,195	(52,030)	$ (102,479)
Beginning balance (in shares) at Jun. 30, 2023		47,519,064			15,260,452
Beginning balance at Jun. 30, 2023	170,036	$ 322,870	875	(54,710)	$ (98,999)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,680			2,680
Unrealized gain (loss) on available-for-sale securities, net of taxes	320		320
Stock repurchases (in shares)					485,061
Stock repurchases	(3,328)				$ (3,328)
Release of restricted stock units and awards, net of shares withheld (in shares)		51,875			21,527
Release of restricted stock units and awards, net of shares withheld	(152)				$ (152)
Proceeds from stock options exercises (in shares)		0
Proceeds from stock options exercises	0	$ 0
Shares issued to an employee in lieu of cash compensation (in shares)		7,326
Shares issued to an employee in lieu of cash compensation	48	$ 48
Dividend declared	(991)	(991)
Stock-based compensation	820	$ 820
Ending balance (in shares) at Sep. 30, 2023		47,578,265			15,767,040
Ending balance at Sep. 30, 2023	$ 169,433	$ 322,747	$ 1,195	$ (52,030)	$ (102,479)