| Note 10 - Shareholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended | |
|---|---|---|
| Mar. 29, 2020 | Mar. 31, 2019 | |
| Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ 0.57 | $ 0.32 | 
| Dividends, Common Stock, Total | $ 5,791 | $ 3,231 | 
| Treasury Stock, Shares, Acquired (in shares) | 12,000 | 16,000 | 
| Treasury Stock Acquired, Average Cost Per Share (in dollars per share) | $ 6.63 | $ 5.87 | 
| Special Cash Dividend [Member] | ||
| Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ 0.25 | |
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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Details 
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