Note 10 - Commitments and Contingencies (Detail) (USD $)	0 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2012	Mar. 13, 2012	Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2012
Loss Contingency, Damages Sought, Value	$ 1,600,000	$ 13,200,000
Liability Insurance Limits Description	4,000,000		4,000,000		4,000,000
Insurance Settlement Third Party Transaction	$1.6		$1.6		$1.6
undefined			4.0	4,000,000	(4,000,000)
Minimum [Member]
Liability Insurance Limits Description	1,000,000		1,000,000		1,000,000
Maximum [Member]
Liability Insurance Limits Description	10,000,000		10,000,000		10,000,000
Excess [Member]
Liability Insurance Limits Description	$ 20,000,000		$ 20,000,000		$ 20,000,000