Note 4 - Acquisitions (Details) - Purchase Price Allocation of Renewables (USD $) In Thousands, unless otherwise specified	Dec. 02, 2013	Oct. 06, 2011
Purchase Price Allocation of Renewables [Abstract]
Cash		$ 144
Inventories	434	45
Other current assets		197
Biomass foundation and feedstock		1,611
Property, plant and equipment	835	114
Intangible assets		536
Total assets	2,934	2,647
Current liabilities		(147)
Total net assets acquired		$ 2,500