Income Taxes - Additional Information (Detail) - Jun. 30, 2015 - USD ($)	Total
Income Tax Contingency [Line Items]
Income tax provision	$ 102,000
Unrecognized tax benefits	2,000,000
Unrecognized tax benefits that would affect income tax expense	2,000,000
Changes to unrecognized tax benefits	100,000
Increase in unrecognized tax benefits that would affect income tax expense	$ 0
Change in unrecognized tax benefits, description	The Company does not have any tax positions as of June 30, 2015 for which it is reasonably possible that the total amount of gross unrecognized tax benefits will significantly increase or decrease within the next 12 months.
U.S. [Member]
Income Tax Contingency [Line Items]
Income tax provision	$ 0