Note 5 - Property, Plant and Equipment (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Depreciation, Depletion and Amortization, Nonproduction	$ 2,300,000	$ 2,982,000
Property, Plant and Equipment [Member]
Depreciation, Depletion and Amortization, Nonproduction	$ 1,336,000	$ 1,959,000