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Capital Stock - Summary of Common Stock Outstanding (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 30, 2019 | Mar. 31, 2018
Class of Stock [Line Items] |  |  |  |  |
Beginning Balance, Shares |  | 17,960,881 |  | 17,960,881 |
Exercise of stock options, Shares |  | 0 |  | 0 |
Ending Balance, Shares |  | 17,960,881 |  | 17,960,881 |
Balance as of beginning balance |  | $ 93,348 |  | $ 93,348 |
Exercise of stock options |  | 0 |  | 0 |
Balance as of ending balance |  | $ 93,348 |  | $ 93,348 |
Class A Common Stock [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Beginning Balance, Shares |  | 10,242,911 | [1] | 10,242,911 |
Exercise of stock options, Shares |  | 0 |  | 0 |
Ending Balance, Shares |  | 10,242,911 |  | 10,242,911 | [1]
Balance as of beginning balance | [1] | $ 35,593 |  | $ 35,593 |
Exercise of stock options | [1] | 0 |  | 0 |
Balance as of ending balance | [1] | $ 35,593 |  | $ 35,593 |
Class B Common Stock [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Beginning Balance, Shares |  | 7,717,970 | [1] | 7,717,970 |
Exercise of stock options, Shares |  | 0 |  | 0 |
Ending Balance, Shares |  | 7,717,970 |  | 7,717,970 | [1]
Balance as of beginning balance | [1] | $ 57,755 |  | $ 57,755 |
Exercise of stock options | [1] | 0 |  | 0 |
Balance as of ending balance | [1] | $ 57,755 |  | $ 57,755 |
[1] | Recast (refer to note 1)

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