Financial Instruments and Risk - Additional Information (Detail) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Schedule Of Cost Method Investments [Line Items] | ||
| Average days to maturity of Company's portfolio of cash equivalents and marketable securities | 45 days | 61 days |
| Maximum [Member] | ||
| Schedule Of Cost Method Investments [Line Items] | ||
| Maturity period of securities | 1 year | |
| X | ||||||||||
- Definition Average period to maturity for portfolio of cash and marketable securities. No definition available.
|
| X | ||||||||||
- Definition Maturity period of securities. No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Details
|