Note 8 - Fair Value of Financial Instruments (Details) - Summary of the terms of the Company’s forward starting interest rate swaps (USD $)	3 Months Ended
	Jun. 30, 2013
Wells Fargo Bank 1, N.A.[Member]
Note 8 - Fair Value of Financial Instruments (Details) - Summary of the terms of the Company’s forward starting interest rate swaps [Line Items]
Notional amount	$ 25,000,000
Effective date	Apr. 15, 2011
Maturity date	Apr. 15, 2021
Cash Settlement Date	Sep. 22, 2014
PNC Bank, N.A. [Member]
Note 8 - Fair Value of Financial Instruments (Details) - Summary of the terms of the Company’s forward starting interest rate swaps [Line Items]
Notional amount	50,000,000
Effective date	Jul. 01, 2011
Maturity date	Jul. 01, 2018
Cash Settlement Date	Dec. 01, 2013
Bank of Montreal [Member]
Note 8 - Fair Value of Financial Instruments (Details) - Summary of the terms of the Company’s forward starting interest rate swaps [Line Items]
Notional amount	50,000,000
Effective date	Apr. 02, 2012
Maturity date	Apr. 01, 2019
Cash Settlement Date	Dec. 01, 2013
Wells Fargo Bank 2, N.A. [Member]
Note 8 - Fair Value of Financial Instruments (Details) - Summary of the terms of the Company’s forward starting interest rate swaps [Line Items]
Notional amount	25,000,000
Effective date	Apr. 02, 2012
Maturity date	Apr. 02, 2019
Cash Settlement Date	Sep. 22, 2014
Royal Bank of Canada [Member]
Note 8 - Fair Value of Financial Instruments (Details) - Summary of the terms of the Company’s forward starting interest rate swaps [Line Items]
Notional amount	$ 25,000,000
Effective date	Apr. 01, 2013
Maturity date	Apr. 03, 2023
Cash Settlement Date	Oct. 31, 2014