Stock Options and Equity-Classified Warrants - Schedule of Warrants Activity and Related Information (Details) - Warrants [Member] - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Number of Warrants Outstanding at beginning of period	3,980,781	5,417,155
Number of Warrants Granted		584,554
Number of Warrants Exercised		(861,581)
Number of Warrants Forfeited
Number of Warrants Expired	(3,287,585)	(1,159,347)
Number of Warrants Outstanding at end of period	693,916	3,980,781
Number of Warrants exercisable at end of period	693,916	3,626,613
Weighted average fair value of stock options granted		$ 1.65
Weighted-Average Exercise Price Warrants Outstanding at beginning of period	4.92	4.08
Weighted-Average Exercise Price Warrants Granted		6.31
Weighted-Average Exercise Price Warrants Exercised		3.66
Weighted-Average Exercise Price Warrants Forfeited
Weighted-Average Exercise Price Warrants Expired	3.65	4.92
Weighted-Average Exercise Price Warrants Outstanding at end of period	7.16	4.92
Weighted-Average Exercise Price Warrants exercisable at end of period	$ 7.16	$ 4.23