Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Restricted Stock Units (RSUs) [Member] Common Stock [Member]	Restricted Stock Units (RSUs) [Member] Additional Paid-in Capital [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2018			14,210
Balance at Dec. 31, 2018			$ 142	$ 50,763	$ 218,233	$ (5,526)	$ 263,612
Issuance of common stock for equity awards (in shares)			551
Issuance of common stock for equity awards			$ 6	22,145	0	0	22,151
Vesting of restricted stock units (in shares)	17
Vesting of restricted stock units	$ 0	$ 0
Forfeiture of restricted stock awards (in shares)			(13)
Forfeiture of restricted stock awards			$ 0	0	0	0	0
Stock-based compensation expense			$ 0	6,087	0	0	6,087
Retirement of common stock for minimum tax withholdings (in shares)			(5)
Retirement of common stock for minimum tax withholdings			$ 0	(293)	0	0	(293)
Repurchase of common stock (in shares)			(452)
Repurchase of common stock			$ (5)	(29,995)	0	0	(30,000)
Net income (loss)			0	0	27,193	0	27,193
Other comprehensive loss			$ 0	0	0	(372)	(372)
Balance (in shares) at Dec. 31, 2019			14,308
Balance at Dec. 31, 2019			$ 143	48,707	245,426	(5,898)	288,378
Issuance of common stock for equity awards (in shares)			123
Issuance of common stock for equity awards			$ 1	1,523	0	0	1,524
Vesting of restricted stock units (in shares)			54
Vesting of restricted stock units			$ 0	0	0	0	0
Forfeiture of restricted stock awards (in shares)			(9)
Forfeiture of restricted stock awards			$ 0	0	0	0	0
Stock-based compensation expense			$ 0	5,386	0	0	5,386
Retirement of common stock for minimum tax withholdings (in shares)			(8)
Retirement of common stock for minimum tax withholdings			$ 0	(262)	0	0	(262)
Repurchase of common stock (in shares)			(139)
Repurchase of common stock			$ (1)	1	0	0	0
Net income (loss)			0	0	(23,982)	0	(23,982)
Other comprehensive loss			$ 0	0	0	1,356	1,356
Balance (in shares) at Dec. 31, 2020			14,329
Balance at Dec. 31, 2020			$ 143	55,355	221,444	(4,542)	272,400
Issuance of common stock for equity awards (in shares)			32
Issuance of common stock for equity awards			$ 0	1,128	0	0	1,128
Vesting of restricted stock units (in shares)			92
Vesting of restricted stock units			$ 1	(1)	0	0	0
Stock-based compensation expense			$ 0	11,085	0	0	11,085
Retirement of common stock for minimum tax withholdings (in shares)			(12)
Retirement of common stock for minimum tax withholdings			$ 0	(486)	0	0	(486)
Net income (loss)			0	0	4,134	0	4,134
Other comprehensive loss			$ 0	0	0	(1,176)	(1,176)
Balance (in shares) at Dec. 31, 2021			14,441
Balance at Dec. 31, 2021			$ 144	$ 67,081	$ 225,578	$ (5,718)	$ 287,085