Stockholders' Equity - Schedule of Share-based Compensation, Stock Options, Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Options Outstanding, Beginning Balance	194,612	388,610
Options Outstanding, Granted
Options Outstanding, Exercised
Options Outstanding, Ending Balance	114,477	194,612
Weighted Average Exercise Price, Outstanding Beginning Balance	$ 2.59	$ 2.59
Weighted Average Exercise Price, Outstanding Ending Balance	$ 2.52	$ 2.59
Stock Option Plans [Member]
Options Outstanding, Beginning Balance	315,167	684,722
Options Outstanding, Granted
Options Outstanding, Exercised
Options Outstanding, Forfeited or expired	(197,492)	(369,555)
Options Outstanding, Ending Balance	117,675	315,167
Options Outstanding, Exercisable at year-end	117,675	315,167
Options Outstanding, Vested or expected to vest at year-end	117,675	315,167
Weighted Average Exercise Price, Outstanding Beginning Balance	$ 2.46	$ 2.64
Weighted Average Exercise Price, Granted
Weighted Average Exercise Price, Exercised
Weighted Average Exercise Price, Forfeited or expired	2.39	2.79
Weighted Average Exercise Price, Outstanding Ending Balance	2.57	2.46
Weighted Average Exercise Price, Exercisable at year-end	2.57	2.46
Weighted Average Exercise Price, Vested or expected to vest at year-end	$ 2.57	$ 2.46