Note 4 - Restructuring of Operations (Details Textual)	3 Months Ended
Mar. 31, 2022
Restructuring and Related Cost, Expected Number of Positions Eliminated	100

The expected number of positions to be eliminated as a result of restructuring activities.

No definition available.

Name:	us-gaap_RestructuringAndRelatedCostExpectedNumberOfPositionsEliminated
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration