Quarterly report pursuant to Section 13 or 15(d)

13. SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION

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13. SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
3 Months Ended
Mar. 31, 2019
Supplemental Cash Flow Information [Abstract]  
13. SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION

Supplemental cash flow information for the three months ended March 31, 2019 and 2018 is as follows: 

 

    2019   2018
SUPPLEMENTAL CASH FLOW INFORMATION:                
Cash paid for interest   $ 1,369,939     $ 825,513  
Noncash Financing and Investing Activities:                
Equipment acquired reflected in accounts payable and accrued liabilities   $ 35,823     $ 116,766  
Warrants issued in connection with notes payable   $ 2,699,208     $ —