Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock Nonemployee	Common Stock Employee	Common Stock	Additional Paid-in Capital [Member] Nonemployee	Additional Paid-in Capital [Member] Employee	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Nonemployee	Employee	Total
Stockholders’ equity at the beginning of period at Dec. 31, 2012			$ 4			$ 171,488	$ 61,947					$ 233,439
Balance as of at Dec. 31, 2012			38,681,660
Changes in Stockholders' Equity
Net income (loss)							11,862					$ 11,862
Accumulated other comprehensive loss
Reduction of excess tax benefit of share-based awards						(647)						$ (647)
Exercise of stock options						55						55
Exercise of stock options, shares			4,200
Issuance of common stock in connection with the release of vested restricted stock units, net of common stock withheld to settle equity awards					$ (199)						$ (199)
Issuance of common stock in connection with the release of vested restricted stock units, net of common stock withheld to settle equity awards, shares	66,057	14,023
Share-based compensation expense				$ 946	6,089					$ 946	6,089
Stockholders’ equity at the end of period at Dec. 31, 2013			$ 4			177,732	73,809					251,545
Balance as of at Dec. 31, 2013			38,765,940
Changes in Stockholders' Equity
Net income (loss)							(10,699)					(10,699)
Accumulated other comprehensive loss								$ (1,654)				(1,654)
Reduction of excess tax benefit of share-based awards						(1,109)						(1,109)
Common stock issued through initial public offering						38,018						38,018
Common stock issued through initial public offering (in Shares)			5,840,000
Cost related to public offering						(3,358)						(3,358)
Treasury stock acquired									$ (345)			(345)
Treasury stock acquired (in Shares)									(29,400)
Exercise of stock options						571						$ 571
Exercise of stock options, shares			30,000									65,000
Issuance of common stock in connection with the release of vested restricted stock units, net of common stock withheld to settle equity awards					(389)						(389)
Issuance of common stock in connection with the release of vested restricted stock units, net of common stock withheld to settle equity awards, shares	25,921	14,306
Share-based compensation expense				946	8,334					946	8,334
Stockholders’ equity at the end of period at Dec. 31, 2014			$ 4			220,745	63,110	(1,654)	$ (345)			$ 281,860
Balance as of at Dec. 31, 2014			44,676,167						(29,400)			44,646,767
Changes in Stockholders' Equity
Net income (loss)							(2,787)					$ (2,787)
Accumulated other comprehensive loss								(821)				(821)
Reduction of excess tax benefit of share-based awards						107						107
Treasury stock acquired									$ (9,865)			(9,865)
Treasury stock acquired (in Shares)									(735,679)
Issuance of common stock from treasury						(38)			$ 38
Issuance of common stock from treasury, shares									3,364
Exercise of stock options			$ 1			13,501						$ 13,502
Exercise of stock options, shares			1,067,466									1,262,663
Issuance of common stock in connection with the release of vested restricted stock units, net of common stock withheld to settle equity awards					(621)						(621)
Issuance of common stock in connection with the release of vested restricted stock units, net of common stock withheld to settle equity awards, shares	676	91,517
Share-based compensation expense				$ 1,131	11,684					$ 1,131	11,684
Issuance of common stock to employees under ESPP					$ 1,320						$ 1,320
Issuance of common stock to employees under ESPP, Shares		124,380
Stockholders’ equity at the end of period at Dec. 31, 2015			$ 5			$ 247,829	$ 60,323	$ (2,475)	$ (10,172)			$ 295,510
Balance as of at Dec. 31, 2015			45,960,206						(761,715)			45,198,491