Quarterly report pursuant to Section 13 or 15(d)

Warrants - Summary of Warrant Activity (Details)

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Warrants - Summary of Warrant Activity (Details) - shares
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Number of warrants outstanding, ending 3,530,000 1,813,000
Warrants [Member]    
Number of warrants outstanding, beginning 243,000 209,000
Number of warrants exercised 84,000
Number of warrants granted (50,000)
Number of warrants expired
Number of warrants outstanding, ending 243,000 243,000
May 2018 Warrants [Member] | Equity [Member]    
Number of warrants outstanding, beginning 84,000
Number of warrants exercised 84,000
Number of warrants granted
Number of warrants expired
Number of warrants outstanding, ending 84,000 84,000
Warrant expiration date Oct. 27, 2022 Oct. 27, 2022
October 2013 Warrants [Member] | Liabilities [Member]    
Number of warrants outstanding, beginning 26,000  
Number of warrants exercised  
Number of warrants granted  
Number of warrants expired  
Number of warrants outstanding, ending 26,000  
Warrant expiration date Oct. 24, 2023  
January 2014 Warrants [Member] | Liabilities [Member]    
Number of warrants outstanding, beginning 133,000 133,000
Number of warrants exercised
Number of warrants granted
Number of warrants expired
Number of warrants outstanding, ending 133,000 133,000
Warrant expiration date Jan. 16, 2024 Jan. 16, 2024
April 2013 Warrants [Member] | Equity [Member]    
Number of warrants outstanding, beginning   50,000
Number of warrants exercised  
Number of warrants granted  
Number of warrants expired   (50,000)
Number of warrants outstanding, ending  
Warrant expiration date   Apr. 25, 2018
October 2013 Series A Warrants [Member] | Liabilities [Member]    
Number of warrants outstanding, beginning   26,000
Number of warrants exercised  
Number of warrants granted  
Number of warrants expired  
Number of warrants outstanding, ending   26,000
Warrant expiration date   Oct. 24, 2023