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Note 9 - Pension Plans (Details Textual)
$ in Thousands
12 Months Ended
Mar. 31, 2016
USD ($)
Fixed Income Funds [Member]  
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount $ 5,100
Diversified Growth Fund [Member] | United Kingdom Plan [Member]  
Defined Benefit Plan, Actual Plan Asset Allocations 50.00%
Debt Securities [Member] | United Kingdom Plan [Member]  
Defined Benefit Plan, Actual Plan Asset Allocations 50.00%
Defined Benefit Plan, Target Plan Asset Allocations 25.00%
Equity Securities [Member] | United Kingdom Plan [Member]  
Defined Benefit Plan, Target Plan Asset Allocations 75.00%
Equity Securities [Member] | Philippine Plan [Member]  
Defined Benefit Plan, Actual Plan Asset Allocations 20.00%
Defined Benefit Plan, Target Plan Asset Allocations 20.00%
Fixed Income Securities [Member] | Philippine Plan [Member]  
Defined Benefit Plan, Actual Plan Asset Allocations 74.00%
Defined Benefit Plan, Target Plan Asset Allocations 75.00%
Cash and Cash Equivalents [Member] | Philippine Plan [Member]  
Defined Benefit Plan, Actual Plan Asset Allocations 6.00%
Defined Benefit Plan, Target Plan Asset Allocations 5.00%
German Plan [Member]  
Defined Benefit Plan Percentage of Accrued Pension Liability By Each Plan 72.00%
United Kingdom Plan [Member]  
Defined Benefit Plan Percentage of Accrued Pension Liability By Each Plan 26.00%
Number of Defined Benefit Plans 3
Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year $ (397)
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year $ 1,100