Legal Proceedings - Additional Information (Detail) € in Millions		1 Months Ended
	May. 13, 2015 USD ($)	Mar. 31, 2014 USD ($)	Mar. 31, 2014 EUR (€)	Sep. 30, 2015 USD ($)
Directors
Loss Contingencies [Line Items]
Non-employee annual compensation subsequent to litigation settlement	$ 375,000
Non-Employee Director
Loss Contingencies [Line Items]
Non-employee annual compensation subsequent to litigation settlement	375,000
Non-employee additional compensation subsequent to litigation settlement	$ 100,000
VAT Assessments
Loss Contingencies [Line Items]
Taxes paid		$ 600,000	€ 0.4
Range of possible loss, maximum				$ 10,500,000