Income taxes (Details) (USD $)	Dec. 31, 2013	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$ 17,467,761	$ 17,183,108	$ 12,885,000
Gross deferred tax assets	17,467,761	17,183,108	12,885,000
Valuation allowance	(17,467,761)	(17,183,108)	(12,885,000)
Deferred tax asset, net