13. SUPPLEMENTAL CASH FLOW INFORMATION (Details) - Supplemental cash flow information (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplemental cash flow information [Abstract]
Interest paid	$ 683,475	$ 718,117	$ 1,037,301
Federal, state and local income taxes paid - net of refunds	3,248,181	2,671,990	4,690,479
Capitalized interest			1,394
Fixed asset purchases in accounts payable	$ 459,941	$ 618,774	$ 154,170