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Tax provision (Details) (USD $)
3 Months Ended 9 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Disclosure Income Tax Provision Benefit [Line Items]        
Current federal tax expense (benefit) $ (28,850) $ 0 $ 0 $ 0
Current state taxes 10,000 10,000 30,000 30,000
Current tax expense on international operations 20,441 25,469 73,024 77,864
Deferred tax (benefit) expense (157,187) (116,627) 526,129 434,211
Tax (benefit) provision $ (155,596) $ (81,158) $ 629,153 $ 542,075