CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parentheticals) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts, trade receivables (in dollars)	$ 1,459,309	$ 1,454,741
Allowance for doubtful accounts, notes and loans receivable (in dollars)	$ 3,350,056	$ 3,350,056
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	19,784,291	19,784,291
Common stock, shares outstanding	19,784,291	19,784,291