Note 19 - Segment Information (Details Textual) $ in Millions	3 Months Ended
Jun. 30, 2021 USD ($) a
Segment Reporting Information [Line Items]
Decrease in employee benefit reserves	$ (3)
Gross Profit [Member]
Segment Reporting Information [Line Items]
Decrease in employee benefit reserves	(2)
Selling, General and Administrative Expenses [Member]
Segment Reporting Information [Line Items]
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

The increase (decrease) during the reporting period in the aggregate amount of obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Name:	us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration