Note 11 - Pension Plans (Details Textual) $ in Millions	12 Months Ended
Mar. 31, 2017 USD ($)	Dec. 31, 2016
Number of Defined Benefit Plans		3
United Kingdom and the Philippines Plans [Member] \| Scenario, Forecast [Member]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year	$ 1.1

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