Note 19 - Segment Information (Details Textual)	Mar. 31, 2021 a
Eastman Business Park [Member] \| Minimum [Member]
Segment Reporting Information [Line Items]
Area of Real Estate Property	1,200

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration