Shareholders' Equity - Additional Information (Detail) - USD ($) |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2016 |
Jan. 02, 2016 |
Jan. 03, 2015 |
Oct. 28, 2015 |
|
| Schedule Of Equity [Line Items] | ||||
| Share repurchased | 299,988 | |||
| Acquisition of treasury stock | $ 2,847,000 | $ 44,000 | $ 1,025,000 | |
| Stock Repurchase Program, Authorized Amount | $ 20,000,000 | |||
| 2015 Share Repurchase Program [Member] | ||||
| Schedule Of Equity [Line Items] | ||||
| Share repurchased | 288,183 | |||
| Acquisition of treasury stock | $ 2,700,000 | |||
| Restricted Stock [Member] | ||||
| Schedule Of Equity [Line Items] | ||||
| Share repurchased | 11,805 | |||
| Acquisition of treasury stock | $ 100,000 | |||