Segments and Geographic Information - Schedule of Revenue by Customer (Detail) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Revenue, Major Customer [Line Items] | |||
| Total revenues | 100.00% | 100.00% | 100.00% |
| Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Merck KGaA [Member] | |||
| Revenue, Major Customer [Line Items] | |||
| Total revenues | 86.00% | 73.00% | 83.00% |
| Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Allergan [Member] | |||
| Revenue, Major Customer [Line Items] | |||
| Total revenues | 14.00% | 17.00% | 15.00% |
| Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Lil Drug Store [Member] | |||
| Revenue, Major Customer [Line Items] | |||
| Total revenues | 10.00% | 2.00% | |