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Note 9 - Derivative Financial Instruments - Fair Value of Swaps Recognized in Accrued Liabilities and in Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Fair Value $ (181) $ (1,038)
Interest Rate Swap Effective December 19, 2014 Number One [Member]    
Notional Amount $ 20,000  
Fixed Rate 1.18%  
Maturity Dec. 19, 2017  
Fair Value $ 8 (201)
Interest Rate Swap Effective December 19, 2014 Number Two [Member]    
Notional Amount $ 5,000  
Fixed Rate 1.20%  
Maturity Dec. 19, 2017  
Fair Value $ 1 (52)
Interest Rate Swap Effective December 18, 2015 [Member]    
Notional Amount $ 15,000  
Fixed Rate 1.46%  
Maturity Dec. 19, 2018  
Fair Value $ (1) (325)
Interest Rate Swap Effective December 19, 2015 [Member]    
Notional Amount $ 10,000  
Fixed Rate 2.01%  
Maturity Dec. 19, 2019  
Fair Value $ (106) (460)
Interest Rate Swap Effective May 24, 2017 Number One [Member]    
Notional Amount $ 25,000  
Fixed Rate 1.88%  
Maturity Apr. 24, 2022  
Fair Value $ (60)
Interest Rate Swap Effective May 24, 2017 Number Two [Member]    
Notional Amount $ 25,000  
Fixed Rate 1.67%  
Maturity May 24, 2020  
Fair Value $ (23)