Subsequent Events - Additional Information (Detail) - $ / shares	1 Months Ended	6 Months Ended
	Jul. 31, 2016	Jun. 30, 2016
Subsequent Event [Line Items]
Number of Options, Granted		5,000
Stock options exercise price		$ 6.53
Subsequent Event [Member] | Executive and Employees [Member]
Subsequent Event [Line Items]
Number of Options, Granted	345,000
Subsequent Event [Member] | Executive and Employees [Member] | Minimum [Member]
Subsequent Event [Line Items]
Stock options exercise price	$ 1.02
Subsequent Event [Member] | Executive and Employees [Member] | Maximum [Member]
Subsequent Event [Line Items]
Stock options exercise price	$ 1.03
Subsequent Event [Member] | Former Employee [Member]
Subsequent Event [Line Items]
Number of Options, Granted	15,000
Subsequent Event [Member] | Former Executive [Member]
Subsequent Event [Line Items]
Number of Options, Granted	275,000
Subsequent Event [Member] | Share-based Compensation Award, Tranche One [Member]
Subsequent Event [Line Items]
Vesting percentage	33.33%
Subsequent Event [Member] | Share-based Compensation Award, Tranche Two [Member]
Subsequent Event [Line Items]
Vesting percentage	33.33%
Subsequent Event [Member] | Share-based Compensation Award, Tranche Three [Member]
Subsequent Event [Line Items]
Vesting percentage	33.33%