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Note 6 - Financial Instruments and Fair Value (Detail) - Derivative Financial Instruments (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Notional Amount $ 40,900
Interest Rate Swap Agreement 1 [Member]
 
Notional Amount 1,993
Fixed Interest Rate 5.075%
Underlying Rate 3 month LIBOR
Expiration Date Jul. 01, 2015
Fair Value (79)
Interest Rate Swap Agreement 2 [Member]
 
Notional Amount 4,116
Fixed Interest Rate 5.075%
Underlying Rate 3 month LIBOR
Expiration Date Jul. 01, 2015
Fair Value (162)
Interest Rate Swap Agreement 3 [Member]
 
Notional Amount 7,143
Fixed Interest Rate 5.39%
Underlying Rate 1 month LIBOR
Expiration Date Dec. 31, 2014
Fair Value (239)
Interest Rate Swap Agreement 4 [Member]
 
Notional Amount 1,381
Fixed Interest Rate 5.39%
Underlying Rate 1 month LIBOR
Expiration Date Dec. 31, 2014
Fair Value (46)
Interest Rate Swap Agreement 5 [Member]
 
Notional Amount 2,457
Fixed Interest Rate 5.39%
Underlying Rate 1 month LIBOR
Expiration Date Dec. 31, 2014
Fair Value (82)
Interest Rate Swap Agreement 6 [Member]
 
Notional Amount 5,561
Fixed Interest Rate 5.39%
Underlying Rate 1 month LIBOR
Expiration Date Dec. 31, 2014
Fair Value (186)
Interest Rate Swap Agreement 7 [Member]
 
Notional Amount 5,096
Fixed Interest Rate 5.38%
Underlying Rate 1 month LIBOR
Expiration Date Jun. 29, 2015
Fair Value (242)
Interest Rate Swap Agreement 8 [Member]
 
Notional Amount 784
Fixed Interest Rate 5.29%
Underlying Rate 1 month LIBOR
Expiration Date Jun. 30, 2015
Fair Value (36)
Interest Rate Swap Agreement 9 [Member]
 
Notional Amount 1,503
Fixed Interest Rate 5.29%
Underlying Rate 1 month LIBOR
Expiration Date Jun. 30, 2015
Fair Value (69)
Interest Rate Swap Agreement 10 [Member]
 
Notional Amount 7,579
Fixed Interest Rate 5.29%
Underlying Rate 1 month LIBOR
Expiration Date Jun. 30, 2015
Fair Value (347)
Interest Rate Swap Agreement 11 [Member]
 
Notional Amount 653
Fixed Interest Rate 5.29%
Underlying Rate 1 month LIBOR
Expiration Date Jun. 30, 2015
Fair Value (30)
Interest Rate Swap Agreement 12 [Member]
 
Notional Amount 2,626
Fixed Interest Rate 5.29%
Underlying Rate 1 month LIBOR
Expiration Date Jun. 30, 2015
Fair Value $ (120)