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Note 11 - Share-based Compensation - Restricted Stock Units Activity (Details)
9 Months Ended
Oct. 01, 2016
$ / shares
shares
Time-based Restricted Stock Units [Member]  
Outstanding non-vested, time-based stock units (in shares) | shares 209,000
Outstanding non-vested, weighted average grant date fair value (in dollars per share) | $ / shares $ 7.10
Granted, time-based stock units (in shares) | shares 25,000
Granted, weighted average grant date fair value (in dollars per share) | $ / shares $ 5.41
Vested (in shares) | shares 0
Vested, weighted average grant date fair value (in dollars per share) | $ / shares $ 0
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, time-based stock units (in shares) | shares 234,000
Outstanding non-vested, weighted average grant date fair value (in dollars per share) | $ / shares $ 6.92
Performance-based Restricted Stock Units [Member]  
Outstanding non-vested, time-based stock units (in shares) | shares 0
Outstanding non-vested, weighted average grant date fair value (in dollars per share) | $ / shares $ 0
Granted, time-based stock units (in shares) | shares 200,000
Granted, weighted average grant date fair value (in dollars per share) | $ / shares $ 5.36
Vested (in shares) | shares 0
Vested, weighted average grant date fair value (in dollars per share) | $ / shares $ 0
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, time-based stock units (in shares) | shares 200
Outstanding non-vested, weighted average grant date fair value (in dollars per share) | $ / shares $ 5.36