Commitments and Contingencies - Additional Information (Detail) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Commitments And Contingencies [Line Items]
Capital lease obligation included in other non-current liabilities	$ 147,000	$ 144,000
Operating lease expiration period	2021-07
Corporate apartment lease term expiring period	12 months
Operating leases rent expense	$ 200,000	500,000	$ 500,000
Environmental liabilities	0	0
Accounts Payable and Accrued Liabilities
Schedule Of Commitments And Contingencies [Line Items]
Capital lease liabilities	100,000	200,000
Other Long-term Liabilities
Schedule Of Commitments And Contingencies [Line Items]
Capital lease obligation included in other non-current liabilities	$ 100,000	$ 200,000
Software License Arrangement
Schedule Of Commitments And Contingencies [Line Items]
Capital lease agreement	6 years