Note 6 - Property, Plant and Equipment (Details) - Property, Plant and Equipment (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Building and improvements	$ 4,324	$ 4,324
Furniture, office equipment & other	1,707	1,930
Leased assets	1,593
Construction in progress	1,052
	15,756	12,897
Total property, plant and equipment	6,453	4,076
Held and Used [Member]
Property, Plant and Equipment [Line Items]
Machinery and equipment	7,080	6,643
Less accumulated depreciation	(9,303)	(8,821)
Total property, plant and equipment	6,453	4,076
Held and Not Used [Member]
Property, Plant and Equipment [Line Items]
Machinery and equipment	3,908	4,249
Less accumulated depreciation	(2,270)	(2,392)
Total property, plant and equipment	$ 1,638	$ 1,857