Commitments and Contingencies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Commitments [Line Items]
Operating lease, expiration year	2019-07
Rent expense	$ 2,800,000	$ 2,900,000	$ 1,200,000
Restricted cash	2,375,000	375,000
Pending Litigation
Other Commitments [Line Items]
Accrued amount for anticipated settlement costs	$ 483,000
Maximum
Other Commitments [Line Items]
Percentage of royalty payments obligation on net product sales	2.00%
Letter of Credit [Member]
Other Commitments [Line Items]
Restricted cash		$ 375,000
Letter of Credit [Member] | Corporate Credit Card Program
Other Commitments [Line Items]
Restricted cash	$ 2,000,000
Vehicles [Member]
Other Commitments [Line Items]
Operating leases arrangement term		36 months