Quarterly report pursuant to Section 13 or 15(d)

13. SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION (Tables)

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13. SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION (Tables)
 6 Months Ended
Jun. 30, 2019
Supplemental Cash Flow Information [Abstract]  
Schedule of supplemental cash flow information
    2019   2018
SUPPLEMENTAL CASH FLOW INFORMATION:                
Cash paid for interest   $ 3,574,304     $ 2,145,005  
Noncash Financing and Investing Activities:                
Equipment acquired reflected in accounts payable and accrued liabilities   $ 290,389     $ 183,233  
Equipment acquired through finance lease   $ —       $ 165,644  
Warrants issued in connection with notes payable   $ 3,579,115     $ —