v3.25.4
Note 8 - Share-based Compensation Plans - Stock Option Activity (Details) - The 2020 Equity Incentive Plan [Member]
 12 Months Ended
Dec. 27, 2025
USD ($)
$ / shares
shares
Outstanding, shares (in shares) | shares 938,300
Outstanding, weighted average exercise price (in dollars per share) | $ / shares $ 2.64
Granted (in shares) | shares 195,780
Granted, weighted average exercise price (in dollars per share) | $ / shares $ 1.63
Exercised, shares (in shares) | shares (21,280)
Exercised, weighted average exercise price (in dollars per share) | $ / shares $ 1.47
Expired, shares (in shares) | shares (45,000)
Expired, weighted average exercise price (in dollars per share) | $ / shares $ 2.85
Outstanding, shares (in shares) | shares 1,067,800
Outstanding, weighted average exercise price (in dollars per share) | $ / shares $ 2.47
Outstanding, weighted remaining contractual life (Year) 6 years 11 months 8 days
Outstanding, Aggregate intrinsic value | $ $ 907,909
Options exercisable, shares (in shares) | shares 622,500
Options exercisable, weighted average exercise price (in dollars per share) | $ / shares $ 2.47
Options exercisable, weighted remaining contractual life (Year) 6 years 2 months 12 days
Options exercisable, Aggregate intrinsic value | $ $ 558,295