Note 15 - Commitments and Contingencies (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended		1 Months Ended		12 Months Ended
	Mar. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Apr. 30, 2012 IRS Examination [Member]	Dec. 31, 2011 IRS Examination [Member]	Dec. 31, 2012 State of Louisiana Examination [Member]	Dec. 31, 2012 TPIC Litigation [Member]
Operating Leases, Rent Expense		$ 189	$ 163
Liability for Uncertain Tax Positions, Current			225		225
Income Taxes Paid, Net				152
Income Tax Examination, Interest Expense				49
Income Tax Expense (Benefit)		(80)	(573)	(73)
Payments for Environmental Liabilities	28
Lease Use Gas Tax Assessed						194
Lease Use Gas Tax Assessed, Interest and Penalties						132
Lease Use Gas Assessment, Total						326
Loss Contingency, Estimate of Possible Loss						$ 326	$ 2,500