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Stockholders' Equity (Details 1) - Stock Option [Member]
3 Months Ended
Mar. 31, 2020
$ / shares
shares
Stock Options:  
Number of Options, Outstanding beginning balance | shares 1,021,243
Number of Options, Granted | shares 24,000
Number of Options, Forfeited or canceled, during the period | shares (229,575)
Number of Options, Expired, during the period | shares (42,293)
Number of Options, Outstanding ending balance | shares 773,375
Number of Options, Exercisable | shares 551,093
Weighted Average Exercise Price, Outstanding beginning balance | $ / shares $ 4.82
Weighted Average Exercise Price, Granted | $ / shares 0.8
Weighted Average Exercise Price, Forfeited or canceled, during the period | $ / shares 3.61
Weighted Average Exercise Price, Expired, during the period | $ / shares 4.07
Weighted Average Exercise Price, Outstanding ending balance | $ / shares 5.09
Weighted Average Exercise Price, Exercisable | $ / shares $ 6.03