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Summary of Significant Accounting Policies (Details 3) - shares
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Average market price of common shares 3,044,000 1,829,000
Average market price of common shares including potential shares was anti-dilutive 515,000 1,175,000
Warrants [Member]    
Average market price of common shares 2,183,000 1,480,000
Average market price of common shares including potential shares was anti-dilutive 480,000
Stock Options [Member]    
Average market price of common shares 861,000 349,000
Average market price of common shares including potential shares was anti-dilutive 515,000 695,000