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Note 10 - Share-based Compensation - Restricted Stock Units Activity (Details) - The 2014 Plan [Member]
6 Months Ended
Jul. 02, 2022
$ / shares
shares
Time-based Restricted Stock Units [Member]  
Outstanding non-vested (in shares) | shares 420,628
Outstanding non-vested, weighted average grant date fair value (in dollars per share) | $ / shares $ 2.69
Granted (in shares) | shares 50,000
Granted, weighted average grant date fair value (in dollars per share) | $ / shares $ 6.71
Vested (in shares) | shares (88,175)
Vested, weighted average grant date fair value (in dollars per share) | $ / shares $ 2.85
Forfeited or expired (in shares) | shares (63,258)
Forfeited or expired, weighted average grant date fair value (in dollars per share) | $ / shares $ 1.87
Outstanding non-vested (in shares) | shares 319,195
Outstanding non-vested, weighted average grant date fair value (in dollars per share) | $ / shares $ 3.44
Performance-based Restricted Stock Units [Member]  
Outstanding non-vested (in shares) | shares 125,000
Outstanding non-vested, weighted average grant date fair value (in dollars per share) | $ / shares $ 3.26
Granted (in shares) | shares 100,000
Granted, weighted average grant date fair value (in dollars per share) | $ / shares $ 6.15
Vested (in shares) | shares (125,000)
Vested, weighted average grant date fair value (in dollars per share) | $ / shares $ 3.26
Forfeited or expired (in shares) | shares 0
Forfeited or expired, weighted average grant date fair value (in dollars per share) | $ / shares $ 0
Outstanding non-vested (in shares) | shares 100,000
Outstanding non-vested, weighted average grant date fair value (in dollars per share) | $ / shares $ 6.15