Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Preferred Stock [Member] Series A Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2017	4,250	14,021,422
Balance at Dec. 31, 2017		$ 14	$ 84,036	$ (73,958)	$ 10,092
Stock based compensation			373		373
Stock option/warrant exercises (in shares)		62,438
Stock option/warrant exercises			73		73
Stock issued – on vested RSUs (in shares)		55,614
Stock issued – on vested RSUs
Stock issued for services (in shares)		5,939
Stock issued for services			36		36
Preferred stock dividends				(106)	(106)
Net income				3	3
Balance (in shares) at Mar. 31, 2018	4,250	14,145,413
Balance at Mar. 31, 2018		$ 14	84,518	(74,061)	10,471
Balance (in shares) at Dec. 31, 2018		18,547,406
Balance at Dec. 31, 2018		$ 19	114,160	(71,031)	43,148
Stock based compensation			606		606
Stock option/warrant exercises (in shares)		104,697
Stock option/warrant exercises			185		185
Stock issued – on vested RSUs (in shares)		64,992
Stock issued – on vested RSUs
Net income				427	427
Balance (in shares) at Mar. 31, 2019		18,717,095
Balance at Mar. 31, 2019		$ 19	$ 114,951	$ (70,604)	$ 44,366