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Note 19 - Income Taxes - Foreign Subsidiaries Income Tax Years Open to Examination (Details)	12 Months Ended
	Dec. 31, 2016
Earliest Tax Year [Member] \| ISRAEL
Countries	2015
Earliest Tax Year [Member] \| KENYA
Countries	2001
Earliest Tax Year [Member] \| GUATEMALA
Countries	2010
Earliest Tax Year [Member] \| PHILIPPINES
Countries	2010
Earliest Tax Year [Member] \| NEW ZEALAND
Countries	2011
Latest Tax Year [Member] \| ISRAEL
Countries	2016
Latest Tax Year [Member] \| KENYA
Countries	2016
Latest Tax Year [Member] \| GUATEMALA
Countries	2016
Latest Tax Year [Member] \| PHILIPPINES
Countries	2016
Latest Tax Year [Member] \| NEW ZEALAND
Countries	2016