Consolidated Statements of Stockholders' Deficit - USD ($) $ in Thousands	Common Stock	Capital deficiency	Accumulated earnings (deficit)	Accumulated other comprehensive loss	Employee notes receivable	Total
Beginning balance at Dec. 31, 2013	$ 41	$ (27,786)	$ (7,504)	$ (1,520)	$ (127)	$ (36,896)
Beginning balance (in shares) at Dec. 31, 2013	41,113,952
Issuance of common stock, net of issuance costs		2,945				2,945
Issuance of common stock, net of issuance costs (in shares)	257,268
Repayment of employee note					19	19
Components of comprehensive income:
Net income			13,302			13,302
Currency translation adjustment				(1,064)		(1,064)
Ending balance at Dec. 31, 2014	$ 41	(24,841)	5,798	(2,584)	(108)	(21,694)
Ending balance (in shares) at Dec. 31, 2014	41,371,220
Issuance of common stock, net of issuance costs	$ 15	135,289				135,304
Issuance of common stock, net of issuance costs (in shares)	15,000,000
Shares issued under stock-based compensation plans (in shares)	257,664
Stock-based compensation		885				885
Redemption of common stock		(46)				(46)
Redemption of common stock (in shares)	(86,768)
Dividend distribution on Series A Preferred Stock		(230,315)				(230,315)
Repayment of employee note					$ 108	108
Components of comprehensive income:
Net income			30,863			30,863
Currency translation adjustment				(1,715)		(1,715)
Ending balance at Dec. 31, 2015	$ 56	(119,028)	36,661	(4,299)		$ (86,610)
Ending balance (in shares) at Dec. 31, 2015	56,542,116					56,542,116
Common stock dividends			(10,049)			$ (10,049)
Common stock repurchased	$ (1)		(6,007)			$ (6,008)
Common stock repurchased, shares	(1,439,422)					(1,439,422)
Shares issued under stock-based compensation plans			(36)			$ (36)
Shares issued under stock-based compensation plans (in shares)	256,557
Stock-based compensation		3,579				3,579
Tax benefit attributable to stock-based compensation and other		568				568
Components of comprehensive income:
Net income			5,399			5,399
Currency translation adjustment				(2,116)		(2,116)
Ending balance at Dec. 31, 2016	$ 55	$ (114,881)	$ 25,968	$ (6,415)		$ (95,273)
Ending balance (in shares) at Dec. 31, 2016	55,359,251					55,359,251