Commitments and Contingencies - Additional Information (Detail) - 9 months ended Jun. 30, 2016	USD ($) € / $ shares	EUR (€) shares
Commitments And Contingencies [Line Items]
Additional shares of common stock to stockholders | shares	480,059	480,059
Annual minimum payments for licenses	$ 221,660	€ 200,000
Exchange rate relating to license payment | € / $	1.1083
License agreement commencement date	2006-03	2006-03
Future minimum payments associated with license | $	$ 2,700,000
Patents [Member]
Commitments And Contingencies [Line Items]
Patent expiry date	2027-09	2027-09