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Note 14 - Other Borrowings (Details Textual) - USD ($)
$ in Thousands
Aug. 31, 2017
Mar. 31, 2018
Mar. 31, 2017
Dec. 15, 2016
Dec. 15, 2015
Dec. 15, 2014
Other Borrowings   $ 0 $ 7,000     $ 10,000
Other Borrowings [Member]            
Debt Instrument, Interest Rate, Stated Percentage           6.50%
Debt Instrument, Annual Principal Payment       $ 2,000 $ 1,000 $ 1,000
Repayments of Long-term Debt, Total $ 7,000