Note 17 - Income Taxes - Foreign Subsidiaries Income Tax Years Open to Examination (Details)	12 Months Ended
	Dec. 31, 2021
Earliest Tax Year [Member] | ISRAEL
Countries	2019
Earliest Tax Year [Member] | KENYA
Countries	2018
Earliest Tax Year [Member] | GUATEMALA
Countries	2016
Earliest Tax Year [Member] | HONDURAS
Countries	2015
Earliest Tax Year [Member] | GUADELOUPE
Countries	2019
Latest Tax Year [Member] | ISRAEL
Countries	2021
Latest Tax Year [Member] | KENYA
Countries	2021
Latest Tax Year [Member] | GUATEMALA
Countries	2021
Latest Tax Year [Member] | HONDURAS
Countries	2021
Latest Tax Year [Member] | GUADELOUPE
Countries	2021