Description of Business and Basis of Presentation - Additional Information (Detail) - USD ($)	Feb. 10, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Significant Accounting Policies [Line Items]
Accumulated deficit		$ (98,719,000)	$ (74,354,000)
Cash and cash equivalents		24,061,000	$ 37,525,000	$ 33,050,000	$ 7,192,000
Covenants with lenders to maintain minimum cash holdings		$ 10,000,000
Ordinary Shares [Member] | Subsequent Event
Significant Accounting Policies [Line Items]
Underwritten equity offering	$ 36,900,000