Stockholders' Equity (Details 1) - Stock Option [Member]	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Stock Options:
Number of Options, Outstanding beginning balance | shares	980,588
Number of Options, Granted | shares	120,130
Number of Options, Exercised | shares	(6,363)
Number of Options, Expired or canceled, during the period | shares	(1,429)
Number of Options, Forfeited, during the period | shares	(55,129)
Number of Options, Outstanding ending balance | shares	1,037,797
Number of Options, Exercisable | shares	611,810
Weighted Average Exercise Price, Outstanding beginning balance | $ / shares	$ 5.02
Weighted Average Exercise Price, Granted | $ / shares	6.02
Weighted Average Exercise Price, Exercised | $ / shares	4.43
Weighted Average Exercise Price, Expired or canceled, during the period | $ / shares	42.35
Weighted Average Exercise Price, Forfeited, during the period | $ / shares	4.54
Weighted Average Exercise Price, Outstanding ending balance | $ / shares	5.12
Weighted Average Exercise Price, Exercisable | $ / shares	$ 5.89