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Note 9 - Pension and Retirement Plans (Detail) - Components of net periodic benefit costs (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Amortization of net (gain)/loss $ 182 $ 147
Increase (decrease) in minimum liability included in other comprehensive income (loss) 591 439
Foreign [Member] | Pension [Member]
   
Service cost 61 73
Interest cost 708 688
Expected return on plan assets (462) (503)
Amortization of net (gain)/loss 82 69
Net periodic benefit cost 389 327
Increase (decrease) in minimum liability included in other comprehensive income (loss) 1,367 373
Foreign [Member]
   
Increase (decrease) in minimum liability included in other comprehensive income (loss) 1,367 373
US [Member] | Pension [Member]
   
Service cost 10 10
Interest cost 84 99
Amortization of net (gain)/loss 30 31
Net periodic benefit cost 124 140
Increase (decrease) in minimum liability included in other comprehensive income (loss) (14) (3)
US [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member]
   
Service cost   20
Interest cost 71 68
Amortization of net (gain)/loss 70 47
Net periodic benefit cost 141 135
Increase (decrease) in minimum liability included in other comprehensive income (loss) (762) 69
US [Member]
   
Increase (decrease) in minimum liability included in other comprehensive income (loss) (776) 66
Pension [Member]
   
Service cost 71 83
Interest cost 792 787
Expected return on plan assets (462) (503)
Amortization of net (gain)/loss 112 100
Net periodic benefit cost 513 467
Increase (decrease) in minimum liability included in other comprehensive income (loss) 1,353 370
Other Postretirement Benefit Plans, Defined Benefit [Member]
   
Service cost   20
Interest cost 71 68
Amortization of net (gain)/loss 70 47
Net periodic benefit cost 141 135
Increase (decrease) in minimum liability included in other comprehensive income (loss) $ (762) $ 69