SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for doubtful accounts
DESCRIPTION
BALANCE AT BEGINNING OF PERIOD	$ 579,588	$ 579,143	$ 411,324
PROVISIONS/ ADDITIONS	104,386	60,057	167,819
RECOVERIES/ DEDUCTIONS	(158,418)	(59,612)
BALANCE AT END OF PERIOD	525,556	579,588	579,143
Valuation allowance for deferred tax assets
DESCRIPTION
BALANCE AT BEGINNING OF PERIOD	3,238,656	3,387,923	3,260,875
PROVISIONS/ ADDITIONS	10,197,845		127,048
RECOVERIES/ DEDUCTIONS	(146,300)	(149,267)
BALANCE AT END OF PERIOD	$ 13,290,201	$ 3,238,656	$ 3,387,923