Income Taxes - Company's Net Deferred Tax Assets and Liabilities (Detail) - USD ($)	Sep. 30, 2015	Sep. 30, 2014
Deferred tax assets:
Net operating loss carryforwards	$ 9,824,977	$ 11,401,483
Foreign deferred assets	258,106
Stock based compensation	2,333,210	1,228,082
AMT credit carryforwards	149,346	66,320
Other, net	304,854	250,999
Research credit carryforwards	43,802	43,802
Total deferred assets	12,914,295	12,990,686
Deferred tax liabilities:
Intangibles	(603,774)
Foreign deferred liabilities	(414,820)
Net deferred tax asset	11,895,701	12,990,686
Valuation allowance for net deferred tax assets	(12,052,415)	$ (12,990,686)
Net deferred tax liability	$ (156,714)