CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Balance (in shares) at Dec. 31, 2017		19,310,000
Balance at Dec. 31, 2017	$ 130,791	$ 96	$ 142,196	$ (164)	$ (11,337)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	485			0	0
Unrealized gain on derivative financial instruments, net of tax	83			83
Net income	161				161
Balance (in shares) at Mar. 31, 2018		19,310,000
Balance at Mar. 31, 2018	$ 131,126	$ 96	142,681	(81)	(11,570)
Balance (in shares) at Dec. 31, 2018	19,382,641	19,383,000
Balance at Dec. 31, 2018	$ 136,435	$ 97	144,013	(86)	(7,589)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation, net of shares withheld for tax payments (in shares)		29,000
Stock-based compensation	418			0	0
Unrealized gain on derivative financial instruments, net of tax	(47)			(47)
Tax payments related to stock-based awards	(157)		(157)
Net income	$ (7,364)				(7,364)
Balance (in shares) at Mar. 31, 2019	19,411,870	19,412,000
Balance at Mar. 31, 2019	$ 129,285	$ 97	$ 144,274	$ (133)	$ (14,953)