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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 |  |

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- 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 + Details
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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 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586 + Details
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- Definition Cash received for the sale of real estate that is not part of an investing activity during the current period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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