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Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)
Mar. 31, 2013
Dec. 31, 2012
Jun. 30, 2012
Consolidated Balance Sheets      
Allowance for doubtful trade accounts receivable   $ 27,600 $ 18,214
Preferred stock: Series D, par value   $ 0.01 $ 0.01
Preferred stock: Series D, shares authorized   5,000,000 5,000,000
Preferred stock: Series D, shares issued   0 0
Preferred stock: Series D, shares outstanding   0 0
Common stock: Class A, par value   $ 0.01 $ 0.01
Common stock: Class A, shares authorized   40,000,000 40,000,000
Common stock: Class A, shares issued 12,955,728   11,711,952
Common stock: Class A, shares outstanding 12,955,728   11,711,952