Related Party Transactions - Additional Information (Details) - USD ($)  | 
12 Months Ended | |||
|---|---|---|---|---|
Dec. 28, 2015  | 
Mar. 31, 2017  | 
Mar. 31, 2016  | 
Mar. 31, 2015  | 
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| Related Party Transaction [Line Items] | ||||
| Proceeds | $ 0 | $ 999,000 | ||
| Sift | ||||
| Related Party Transaction [Line Items] | ||||
| Ownership | 9.90% | |||
| Net cash from investment in Sift | $ 1,000 | $ 346,000 | $ 0 | $ 0 | 
| X | ||||||||||
- Definition Cost Method Investments, Ownership Percentage No definition available. 
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- Definition Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
- Definition Cash received from licensees for license fees during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| 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. 
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- Details 
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