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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Payment, Tax Withholding, Share-based Payment Arrangement | $ 9,225 | $ 5,313
Proceeds from Change in Tenants' Security Deposits | $ 890 | 46
Revision of Prior Period, Reclassification, Adjustment [Member] |  |
Proceeds from (Payments for) Other Financing Activities |  | (5,300)
Payment, Tax Withholding, Share-based Payment Arrangement |  | 5,300
Proceeds from Change in Tenants' Security Deposits |  | $ 50

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- Definition Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585 + Details
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