Note 11 - Business Segment Information (Details Textual)	Dec. 31, 2021	Dec. 31, 2020
Number of Countries in which Entity Operates	135
UNITED STATES
Long Lived Assets, Percent	86.00%	86.00%

The number of countries in which the entity operates as of balance sheet date.

No definition available.

Name:	us-gaap_NumberOfCountriesInWhichEntityOperates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant