Consolidated Statements of Stockholders' Deficit - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Retained Earnings (Deficit)
Shares, beginning balance at Dec. 31, 2014		24,322,249
Beginning balance at Dec. 31, 2014	$ (118,084)	$ 24	$ (10,055)	$ 395	$ (108,448)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises, shares		171,718
Stock option exercises	283		283
Common stock grants, shares		67,609
Common stock grants	445		445
Restricted stock grants, shares		507,000
Forfeiture of restricted stock, shares		(249,790)
Compensation related to stock options and restricted stock grants	941		941
Dividend forfeitures	176				176
Net income	21,158				21,158
Derivative financial instruments	(753)			(753)
Foreign currency translation adjustment	(165)			(165)
Dividend related to registration rights	(246)				(246)
Shares, ending balance at Dec. 31, 2015		24,818,786
Ending balance at Dec. 31, 2015	(96,245)	$ 24	(8,386)	(523)	(87,360)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises, shares		226,011
Stock option exercises	318		318
Common stock grants, shares		206,750
Common stock grants	246		246
Restricted stock grants, shares		1,711,000
Forfeiture of restricted stock, shares		(402,000)
Compensation related to stock options and restricted stock grants	1,561		1,561
Dividend forfeitures	52				52
Net income	8,043				8,043
Derivative financial instruments	531			531
Foreign currency translation adjustment	(176)			(176)
Shares, ending balance at Dec. 31, 2016		26,560,547
Ending balance at Dec. 31, 2016	(85,670)	$ 24	(6,261)	(168)	(79,265)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises, shares		44,114
Stock option exercises	$ 111	$ 1	110
Common stock grants, shares	108,940
Common stock grants	$ 368
Restricted stock grants, shares		506,200
Forfeiture of restricted stock, shares		(70,666)
Compensation related to stock options and restricted stock grants	1,493		1,493
Dividend forfeitures	3				3
Net income	4,369				4,369
Derivative financial instruments	1,327			1,327
Foreign currency translation adjustment	42			42
Shares, ending balance at Dec. 31, 2017		27,149,135
Ending balance at Dec. 31, 2017	$ (77,957)	$ 25	$ (4,290)	$ 1,201	$ (74,893)