Commitments and Contingencies - Additional Information (Detail) € in Millions		12 Months Ended
	Jul. 31, 2014 EUR (€)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2015 EUR (€)	Jul. 01, 2013 USD ($)
Commitments and Contingencies [Line Items]
Operating lease rent expenses | $		$ 426,000	$ 737,000	$ 645,000
Purchase commitment amount under Insulin Supply Agreement	€ 120.1
Purchase obligation remaining amount in 2015		116,200,000			€ 98.5
Purchase obligation, due in 2016					28.8
Purchase obligation, due in 2017					23.3
Purchase obligation, due in 2018					23.3
Purchase obligation, due in 2019					€ 23.3
Purchase commitment cancellation fees | $		$ 5,200,000
Supply Agreement expiration period		Dec. 31, 2019
Supply Agreement renewal period		2 years
Deerfield | Milestone Rights Liability | Maximum
Commitments and Contingencies [Line Items]
Contingent liability for milestone payments | $						$ 90,000,000