Income taxes (Tables)

12 Months Ended

Sep. 30, 2012

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	2012		2011
Deferred taxes
Non-operating loss carryforward	$	16,512,538	$	16,152,227
Share-based compensation		2,235,711		2,226,186
R&D tax credit carryforward		973,000		973,000
Other		349,028		450,821
Total deferred tax assets		20,070,277		19,802,234
Deferred tax liabilities		(528,808)		(528,808)
Valuation allowance		(19,541,469)		(19,273,426)
Deferred tax assets and liabilities, net		-		-