Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) (USD $)	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) [Line Items]
Notional Amount	$ 50,000,000
Fair Value	(1,875,000)	(2,734,000)
June 1, 2010 (1) [Member]
Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) [Line Items]
Notional Amount	5,000,000
Fixed Interest Rate	2.495%
Maturity	May 26, 2015
Fair Value	(205,000)	(300,000)
June 1, 2010 (2) [Member]
Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) [Line Items]
Notional Amount	5,000,000
Fixed Interest Rate	2.495%
Maturity	May 26, 2015
Fair Value	(205,000)	(300,000)
June 4, 2010 [Member]
Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) [Line Items]
Notional Amount	10,000,000
Fixed Interest Rate	2.395%
Maturity	May 26, 2015
Fair Value	(389,000)	(566,000)
June 9, 2010 [Member]
Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) [Line Items]
Notional Amount	5,000,000
Fixed Interest Rate	2.34%
Maturity	May 26, 2015
Fair Value	(190,000)	(275,000)
June 18, 2010 [Member]
Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) [Line Items]
Notional Amount	5,000,000
Fixed Interest Rate	2.38%
Maturity	May 26, 2015
Fair Value	(194,000)	(283,000)
September 21, 2011 (1) [Member]
Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) [Line Items]
Notional Amount	5,000,000
Fixed Interest Rate	1.28%
Maturity	Sep. 21, 2013
Fair Value	(14,000)	(61,000)
September 21, 2011 (2) [Member]
Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) [Line Items]
Notional Amount	5,000,000
Fixed Interest Rate	1.60%
Maturity	Sep. 22, 2014
Fair Value	(83,000)	(136,000)
March 15, 2012 [Member]
Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) [Line Items]
Notional Amount	10,000,000
Fixed Interest Rate	2.75%
Maturity	Mar. 15, 2016
Fair Value	$ (595,000)	$ (813,000)