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Note 1 - Management Statement (Details Textual) - USD ($) $ in Thousands | 3 Months Ended
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Sep. 30, 2017 | Mar. 31, 2017 | Sep. 30, 2016
Income Tax Expense (Benefit) | $ 5,030 |  | $ 5,163
Accounting Standards Update 2016-09 [Member] |  |  |
Income Tax Expense (Benefit) |  | $ 400 |

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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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