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Note 14 - Subsequent Events (Details Textual) - Subsequent Event [Member] - USD ($) $ / shares in Units, $ in Millions					3 Months Ended
	Feb. 23, 2021	Feb. 19, 2021	Feb. 09, 2021	Jan. 28, 2021	Mar. 30, 2021
Common Stock, Dividends, Per Share, Declared (in dollars per share)	$ 0.101
Dividends Payable, Date to be Paid	Mar. 16, 2021
Dividends Payable, Date of Record	Mar. 09, 2021
Polar Multi-Strategy Master Fund [Member] | Notes Payable to Banks [Member]
Repayments of Long-term Debt, Total					$ 7.7
Waterman Plaza [Member]
Proceeds from Sale of Real Estate, Total				$ 3.5
Garden Gateway [Member]
Proceeds from Sale of Real Estate, Total		$ 11.2	$ 11.2

X

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

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- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
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+ References

No definition available.

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+ References

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-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
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