CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning Balance at Dec. 31, 2017	$ 3,488	$ 6	$ 285	$ 284,396	$ (281,124)	$ (75)
Balance (in shares) at Dec. 31, 2017		569	28,480,148
Stock-based compensation expense	61			61
Net income	1,289				1,289
Ending Balance at Mar. 31, 2018	4,838	$ 6	$ 285	284,457	(279,835)	(75)
Balance (in shares) at Mar. 31, 2018		569	28,480,148
Beginning Balance at Dec. 31, 2017	3,488	$ 6	$ 285	284,396	(281,124)	(75)
Balance (in shares) at Dec. 31, 2017		569	28,480,148
Net income	3,343
Foreign currency translation adjustment	(2)
Ending Balance at Sep. 30, 2018	7,122	$ 6	$ 293	284,681	(277,781)	(77)
Balance (in shares) at Sep. 30, 2018		569	29,253,278
Beginning Balance at Mar. 31, 2018	4,838	$ 6	$ 285	284,457	(279,835)	(75)
Balance (in shares) at Mar. 31, 2018		569	28,480,148
Stock-based compensation expense	85			85
Issuance of restricted common stock			$ 6	(6)
Issuance of restricted common stock, shares			600,000
Issuance of common stock from exercise of stock options	74		$ 2	72
Issuance of common stock from exercise of stock options, shares			173,130
Net income	1,685				1,685
Foreign currency translation adjustment	4					4
Ending Balance at Jun. 30, 2018	6,686	$ 6	$ 293	284,608	(278,150)	(71)
Balance (in shares) at Jun. 30, 2018		569	29,253,278
Stock-based compensation expense	73			73
Net income	369				369
Foreign currency translation adjustment	(6)					(6)
Ending Balance at Sep. 30, 2018	7,122	$ 6	$ 293	284,681	(277,781)	(77)
Balance (in shares) at Sep. 30, 2018		569	29,253,278
Beginning Balance at Dec. 31, 2018	7,600	$ 6	$ 293	284,751	(277,373)	(77)
Balance (in shares) at Dec. 31, 2018		569	29,253,278
Stock-based compensation expense	71			71
Net income	612				612
Ending Balance at Mar. 31, 2019	8,283	$ 6	$ 293	284,822	(276,761)	(77)
Balance (in shares) at Mar. 31, 2019		569	29,253,278
Beginning Balance at Dec. 31, 2018	7,600	$ 6	$ 293	284,751	(277,373)	(77)
Balance (in shares) at Dec. 31, 2018		569	29,253,278
Net income	3,322
Ending Balance at Sep. 30, 2019	11,132	$ 6	$ 293	284,961	(274,051)	(77)
Balance (in shares) at Sep. 30, 2019		569	29,253,278
Beginning Balance at Mar. 31, 2019	8,283	$ 6	$ 293	284,822	(276,761)	(77)
Balance (in shares) at Mar. 31, 2019		569	29,253,278
Stock-based compensation expense	76			76
Net income	1,494				1,494
Ending Balance at Jun. 30, 2019	9,853	$ 6	$ 293	284,898	(275,267)	(77)
Balance (in shares) at Jun. 30, 2019		569	29,253,278
Stock-based compensation expense	63			63
Net income	1,216				1,216
Ending Balance at Sep. 30, 2019	$ 11,132	$ 6	$ 293	$ 284,961	$ (274,051)	$ (77)
Balance (in shares) at Sep. 30, 2019		569	29,253,278