Significant Accounting Policies and Related Matters - Summary of Allowance for Doubtful Accounts and Sales Returns (Detail) - Allowance for Doubtful Accounts and Sales Returns [Member] - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Valuation and Qualifying Accounts Disclosure [Line Items] | |||
| Balance at Beginning of Period | $ 242 | $ 263 | $ 326 |
| Additions (recoveries) charged to Income | 182 | 54 | (29) |
| Deductions from Reserves | 181 | 75 | 34 |
| Balance at End of Period | $ 243 | $ 242 | $ 263 |