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Consolidated Balance Sheets (Parentheticals) - $ / shares
shares in Thousands
Jun. 30, 2017
Mar. 31, 2017
Statement of Financial Position [Abstract]    
Preferred stock, no par value (in dollars per share) $ 0 $ 0
Preferred stock, shares authorized 5,000 5,000
Preferred stock, shares issued 0 0
Common stock, no par value (in dollars per share) $ 0 $ 0
Common stock, shares authorized 50,000 50,000
Common stock, shares issued 12,538 12,524
Common stock, shares outstanding 7,824 7,810
Treasury stock, shares 4,714 4,714