Note 10 - Pension Plans (Details Textual) $ in Millions	12 Months Ended
Mar. 31, 2017 USD ($)	Sep. 30, 2016
United Kingdom and the Philippines Plans [Member] \| Scenario, Forecast [Member]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year	$ 1.1
Number of Defined Benefit Plans		3

Amount of employer's best estimate of contributions expected to be paid to the plan in the current remaining fiscal period.

No definition available.

Name:	us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInCurrentFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration