Product Development Obligations - Additional Information (Detail) $ in Millions |
12 Months Ended | |
---|---|---|
Dec. 31, 2016
USD ($)
DevelopmentObligation
|
Dec. 31, 2015
USD ($)
|
|
Debt Instrument [Line Items] | ||
Number of product development obligations | DevelopmentObligation | 11 | |
Accrued product development costs excluding interest | $ 9.9 | $ 10.3 |
Accrued Interest | $ 4.9 | $ 4.8 |
Bank of Finland Interest Rate [Member] | ||
Debt Instrument [Line Items] | ||
Interest rate percentage | 1.00% | |
Minimum [Member] | ||
Debt Instrument [Line Items] | ||
Interest rate on product development advances | 3.00% |