Consolidated Statement of Stockholders' Equity Statement - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss)	Treasury Stock [Member]	Treasury Stock, Common [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding		28,396,189
Stock Issued During Period, Shares, Share-based Compensation, Net of Tax Withholdings		1,079,080
Stock Issued During Period, Value, Share-based Compensation, Net of Tax Withholdings	$ 3,083		$ 3,083
Beginning Balance at Dec. 31, 2015	45,356	$ 0	122,844	$ (74,385)	$ (502)	$ (2,601)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of warrants		59,999
Settlement of warrant liabilities	600		600
Treasury Stock, Value, Acquired, Cost Method	(600)						$ (600)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	3,047		3,047
Other comprehensive income (loss), net of taxes	125				125
Net loss	(6,896)			(6,896)
Ending Balance at Dec. 31, 2016	44,715	$ 0	129,574	(81,281)	(377)	(3,201)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury Stock, Shares, Acquired		(36,321)
Common Stock, Shares, Outstanding		29,498,947
Stock Issued During Period, Shares, Share-based Compensation, Net of Tax Withholdings		622,549
Stock Issued During Period, Value, Share-based Compensation, Net of Tax Withholdings	1,375		1,375
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	3,562		3,562
Other comprehensive income (loss), net of taxes	285				285
Net loss	(1,503)			(1,503)
Ending Balance at Dec. 31, 2017	$ 48,434	$ 0	134,511	(82,784)	(92)	(3,201)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding		30,121,496
Stock Issued During Period, Shares, New Issues	2,090,909	2,090,909
Proceeds from issuance of common stock, follow-on public offering	$ 65,638		65,638
Payments to Acquire Buildings, Shares		303,030
Payment to Acquire Corporate Building, Fair Value of Shares	9,633		9,633
Stock Issued During Period, Shares, Share-based Compensation, Net of Tax Withholdings		1,278,386
Stock Issued During Period, Value, Share-based Compensation, Net of Tax Withholdings	1,806		1,806
Redemption of warrants		231,315
Settlement of warrant liabilities	300		3,300				$ (3,000)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	4,950		4,950
Other comprehensive income (loss), net of taxes	(661)
Net loss	(927)
Ending Balance at Dec. 31, 2018	$ 129,173	$ 0	$ 219,838	$ (83,711)	$ (753)	$ (6,201)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding	34,025,136	34,025,136