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	$	—