Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
BALANCE (in shares) at Dec. 31, 2018	15,982,622	(273,937)
BALANCE at Dec. 31, 2018	$ 16	$ (1,842)	$ 381,441	$ (336,253)	$ 43,362
Stock issued for restricted stock (in shares)	141,384
Stock issued under defined contribution 401(k) retirement savings plan (in shares)	135,636
Stock issued under defined contribution 401(k) retirement savings plan			187		187
Share-based compensation			255		255
Net income (loss)				(1,042)	(1,042)
BALANCE (in shares) at Mar. 31, 2019	16,259,642	(273,937)
BALANCE at Mar. 31, 2019	$ 16	$ (1,842)	381,883	(337,295)	42,762
BALANCE (in shares) at Dec. 31, 2018	15,982,622	(273,937)
BALANCE at Dec. 31, 2018	$ 16	$ (1,842)	381,441	(336,253)	43,362
Net income (loss)					(2,958)
BALANCE (in shares) at Sep. 30, 2019	16,626,489	(273,937)
BALANCE at Sep. 30, 2019	$ 16	$ (1,842)	382,875	(339,211)	41,838
BALANCE (in shares) at Mar. 31, 2019	16,259,642	(273,937)
BALANCE at Mar. 31, 2019	$ 16	$ (1,842)	381,883	(337,295)	42,762
Stock issued for restricted stock (in shares)	53,740
Stock issued under defined contribution 401(k) retirement savings plan (in shares)	123,727
Stock issued under defined contribution 401(k) retirement savings plan			205		205
Share-based compensation			255		255
Net income (loss)				(1,018)	(1,018)
BALANCE (in shares) at Jun. 30, 2019	16,437,109	(273,937)
BALANCE at Jun. 30, 2019	$ 16	$ (1,842)	382,343	(338,313)	42,204
Stock issued for restricted stock (in shares)	19,436
Stock issued under defined contribution 401(k) retirement savings plan (in shares)	169,944
Stock issued under defined contribution 401(k) retirement savings plan			277		277
Share-based compensation			255		255
Net income (loss)				(898)	(898)
BALANCE (in shares) at Sep. 30, 2019	16,626,489	(273,937)
BALANCE at Sep. 30, 2019	$ 16	$ (1,842)	382,875	(339,211)	41,838
BALANCE (in shares) at Dec. 31, 2019	16,830,930	(273,937)
BALANCE at Dec. 31, 2019	$ 17	$ (1,842)	383,361	(340,776)	40,760
Stock issued for restricted stock (in shares)	83,050
Share-based compensation			308		308
Net income (loss)				954	954
BALANCE (in shares) at Mar. 31, 2020	16,913,980	(273,937)
BALANCE at Mar. 31, 2020	$ 17	$ (1,842)	383,669	(339,822)	42,022
BALANCE (in shares) at Dec. 31, 2019	16,830,930	(273,937)
BALANCE at Dec. 31, 2019	$ 17	$ (1,842)	383,361	(340,776)	40,760
Net income (loss)					480
BALANCE (in shares) at Sep. 30, 2020	17,211,498	(273,937)
BALANCE at Sep. 30, 2020	$ 17	$ (1,842)	384,356	(340,296)	42,235
BALANCE (in shares) at Mar. 31, 2020	16,913,980	(273,937)
BALANCE at Mar. 31, 2020	$ 17	$ (1,842)	383,669	(339,822)	42,022
Stock issued for restricted stock (in shares)	199,636
Share-based compensation			248		248
Net income (loss)				529	529
BALANCE (in shares) at Jun. 30, 2020	17,113,616	(273,937)
BALANCE at Jun. 30, 2020	$ 17	$ (1,842)	383,917	(339,293)	42,799
Stock issued for restricted stock (in shares)	6,401
Share-based compensation			207		207
Net income (loss)				(1,003)	(1,003)
Sale of common stock, net (in shares)	91,481
Sale of common stock, net			232		232
BALANCE (in shares) at Sep. 30, 2020	17,211,498	(273,937)
BALANCE at Sep. 30, 2020	$ 17	$ (1,842)	$ 384,356	$ (340,296)	$ 42,235