Annual report pursuant to Section 13 and 15(d)

14. SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION (Tables)

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14. SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION (Tables)
12 Months Ended
Dec. 31, 2018
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]  
Schedule of supplemental cash flow information
    2018   2017
SUPPLEMENTAL CASH FLOW INFORMATION:                
Cash paid for interest   $ 4,399,972     $ 2,293,590  
Noncash Financing and Investing Activities:                
Equipment acquired reflected in accounts payable and accrued liabilities   $ 238,790     $ 544,125  
Equipment acquired through capital lease   $ 165,644     $ —    
Warrants issued in connection with notes payable   $ —       $ 614,513  
End of term liability for senior notes payable   $ —       $ 2,760,000  
Assets acquired through the issuance of common stock and liabilities assumed   $ —       $ 60,161,629