Annual report pursuant to Section 13 and 15(d)

Note 7 - Stock-based Compensation - Valuation Assumptions of Stock Options (Details)

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Note 7 - Stock-based Compensation - Valuation Assumptions of Stock Options (Details) - Black Scholes Weighted Average Assumptions [Member] - Share-based Payment Arrangement, Option [Member] - $ / shares
12 Months Ended
Dec. 29, 2019
Dec. 30, 2018
Dec. 31, 2017
Expected dividend yield 0.00%  
Expected volatility 42.10%
Expected forfeiture 30.00%
Risk-free interest rate 2.84%
Expected stock option life in years (Year) 4 years
Weighted-average stock option fair value per stock option granted (in dollars per share) $ 1