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Note 13 Stock Options Outstanding (Details)
shares in Thousands
12 Months Ended
Sep. 30, 2017
$ / shares
shares
$1.80-$8.81  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number Outstanding | shares 1,922
Weighted Average Remaining Contractual Life (Years) 2 years 10 months 24 days
Weighted Average Exercise Price ($) | $ / shares $ 7.88
Number Exercisable | shares 1,920
Weighted Average Exercise Price ($) | $ / shares $ 7.88
$8.82-$11.57  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number Outstanding | shares 455
Weighted Average Remaining Contractual Life (Years) 3 years 6 months 18 days
Weighted Average Exercise Price ($) | $ / shares $ 11.08
Number Exercisable | shares 455
Weighted Average Exercise Price ($) | $ / shares $ 11.08
$11.58-$15.47  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number Outstanding | shares 194
Weighted Average Remaining Contractual Life (Years) 11 months 2 days
Weighted Average Exercise Price ($) | $ / shares $ 12.02
Number Exercisable | shares 194
Weighted Average Exercise Price ($) | $ / shares $ 12.02
$15.48-$23.76  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number Outstanding | shares 555
Weighted Average Remaining Contractual Life (Years) 5 years 6 months 18 days
Weighted Average Exercise Price ($) | $ / shares $ 15.87
Number Exercisable | shares 536
Weighted Average Exercise Price ($) | $ / shares $ 15.80
$23.77-$24.65  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number Outstanding | shares 442
Weighted Average Remaining Contractual Life (Years) 7 years 2 months 13 days
Weighted Average Exercise Price ($) | $ / shares $ 24.61
Number Exercisable | shares 364
Weighted Average Exercise Price ($) | $ / shares $ 24.60
$1.80-$24.65  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number Outstanding | shares 3,568
Weighted Average Remaining Contractual Life (Years) 3 years 9 months 26 days
Weighted Average Exercise Price ($) | $ / shares $ 11.83
Number Exercisable | shares 3,469
Weighted Average Exercise Price ($) | $ / shares $ 11.51