Note 15 - Segment Information (Details Textual) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($) a
Segment Reporting Information [Line Items]
Increase (decrease) in employee benefit reserves	$ (4)
Gross Profit [Member]
Segment Reporting Information [Line Items]
Increase (decrease) in employee benefit reserves	(3)
Selling, General and Administrative Expenses [Member]
Segment Reporting Information [Line Items]
Increase (decrease) in employee benefit reserves	$ (1)
Eastman Business Park [Member] | Minimum [Member]
Segment Reporting Information [Line Items]
Area of Real Estate Property | a	1,200