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Note 9 - Share-based Compensation - PSU Awards Outstanding and PSU Activity (Details) - Performance Share Units [Member]
$ / shares in Units, shares in Thousands, $ in Thousands
9 Months Ended
Aug. 31, 2017
USD ($)
$ / shares
shares
Balance - beginning of year (in shares) | shares 2,619
Balance - beginning of year (in dollars per share) | $ / shares $ 3.15
Balance - end of year (in dollars per share) | $ / shares $ 4.10
Aggregate intrinsic value - end of year | $ $ 566
Granted (in shares) | shares 940
Granted (in dollars per share) | $ / shares $ 4.58
Vested (in shares) | shares (1,556)
Vested (in dollars per share) | $ / shares $ 2.83
Performance adjustment (in shares) | shares 179
Performance adjustment (in dollars per share) | $ / shares $ 2.83
Forfeited (in shares) | shares (6)
Forfeited (in dollars per share) | $ / shares $ 5.29
Balance - end of year (in shares) | shares 2,176