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Note 14 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Millions | Feb. 28, 2020 | Jun. 30, 2020 | Dec. 31, 2019 | Sep. 30, 2019
--- | --- | --- | --- | ---
Common Stock, Par or Stated Value Per Share (in dollars per share) |  | $ 0.01 | $ 0.01 |
ATM Program [Member] |  |  |  |
Common Stock, Par or Stated Value Per Share (in dollars per share) |  |  |  | $ 0.01
Sales of Stock Maximum Sales Price |  |  |  | $ 500.0
Share Repurchase Program [Member] |  |  |  |
Stock Repurchase Program, Period in Force (Year) | 2 years |  |  |
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ 0.01 |  |  |
Stock Repurchase Program, Authorized Amount | $ 300.0 |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  | $ 224.9 |  |

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- Definition Face amount or stated value per share of common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Period which shares may be purchased under a stock repurchase plan authorized by an entity's Board of Directors, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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