Note 11 - Commitments and Contingencies (Detail) (USD $)	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Payments for Environmental Liabilities	$ 295,000
Accrual for Environmental Loss Contingencies, Provision for New Losses	100,000
Accrual for Environmental Loss Contingencies	235,000	430,000
Long-term Purchase Commitment, Amount	3,187,000
Development in Process	2,180,000
Contract [Member]
Long-term Purchase Commitment, Amount	$ 2,484,000