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Note 13 - Subsequent Event (Details Textual) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended
--- | --- | ---
Apr. 30, 2020 | Mar. 31, 2020
Treasury Stock, Value, Acquired, Cost Method |  | $ 6
Repurchase Authorization 2019 [Member] |  |
Treasury Stock, Shares, Acquired (in shares) |  | 500,923
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) |  | $ 11.39
Treasury Stock, Value, Acquired, Cost Method |  | $ 6
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  | $ 123
Repurchase Authorization 2019 [Member] | Subsequent Event [Member] |  |
Treasury Stock, Shares, Acquired (in shares) | 404,913 |
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) | $ 10.57 |
Treasury Stock, Value, Acquired, Cost Method | $ 4 |
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $ 119 |

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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 3: 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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