Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Stock-based Compensation - Stock Option Activity (Details)

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Note 6 - Stock-based Compensation - Stock Option Activity (Details) - $ / shares
 6 Months Ended 12 Months Ended
Oct. 01, 2017
Oct. 02, 2016
Apr. 02, 2017
Outstanding, Weighted-average exercise price, beginning balance (in dollars per share) $ 8.35 $ 7.64 $ 7.64
Outstanding, Shares, beginning balance (in shares) 322,500 305,000 305,000
Granted, Weighted-average exercise price (in dollars per share) $ 7.41 $ 9.60  
Number of options issued (in shares) 130,000 120,000 120,000
Exercised, Weighted-average exercise price (in dollars per share) $ 7.68  
Exercised, Shares (in shares) (77,500)  
Forfeited, Weighted-average exercise price (in dollars per share) $ 9.01  
Forfeited, Shares (in shares) (52,500)  
Outstanding, Weighted-average exercise price, ending balance (in dollars per share) $ 8.01 $ 8.30 $ 8.35
Outstanding, Shares, ending balance (in shares) 400,000 347,500 322,500
Exercisable, Weighted-average exercise price (in dollars per share) $ 7.99 $ 7.38  
Exercisable, Shares (in shares) 230,000 172,500