4. SUPPLEMENTAL CASH FLOW INFORMATION (Tables)

9 Months Ended

Sep. 30, 2017

Supplemental Cash Flow Elements [Abstract]

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

Supplemental cash flow information is as follows:

	Nine Months Ended
	September 30,
	2017		2016
Supplemental cash flow information:
Interest	$	292,961	$	431,591
Federal, state and local income taxes, net of refunds	$	646,129	$	231,707
Non-cash information:
Fixed asset purchases in accounts payable	$	284,370	$	253,303