Accounts receivable (Details) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade receivables	$ 3,977,347	$ 6,319,544
Allowance for doubtful accounts	(102,123)	(352,123)
Sales reserve	(1,694,948)	(3,349,340)
Net trade receivables	2,180,276	2,618,081
Total other non trade receivables	278,497	1,995,654
Receivable From Contract Manufacturers [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total other non trade receivables	74,797	1,649,444
Gst and Vat Taxes Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total other non trade receivables	147,816	287,446
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total other non trade receivables	$ 55,884	$ 58,764