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Stock-Based Compensation (Deferred Stock) - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jul. 13, 2019 | Jul. 13, 2019 | Dec. 29, 2018
Deferred stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Common shares vested |  | 66,000 |
Deferred Stock Activity |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Unrecognized compensation cost related to nonvested restricted stock granted by the Omnibus Plan | $ 0.9 | $ 0.9 |
Expected weighted-average period to recognize compensation cost (years) |  | 10 months 13 days |
Intrinsic value of shares vested | $ 1.4 | $ 1.4 |
Annual Grants | Deferred stock | Non Employee Directors |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Aggregate shares elected to receive |  | 46,240 | 65,000
Annual Grants | Deferred stock | Non Employee Directors | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period |  |  | 1 year
Retainer Conversion |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Retainers conversion into deferred shares |  | 100.00% |
Vesting period |  | 1 year |
Previous Director Retainer Deferrals | Deferred stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Common shares vested |  | 5,180 |
Common shares issued |  | 5,180 |
Director Retainer Deferrals | Omnibus Plan | Deferred stock | Non Employee Directors |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Aggregate shares elected to receive |  | 2,707 |

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