Note 6 - Financial Instruments and Fair Value (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Sep. 30, 2013	Dec. 31, 2012
Fair Value Disclosures [Abstract]
Available-for-sale Securities, Debt Securities, Noncurrent		$ 6,628,000	$ 6,628,000
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis		7,600,000
Derivative, Basis Spread on Variable Rate (in Basis Points)		2.25%
Asset Impairment Charges	1,000,000
Derivative Asset, Notional Amount		39,200,000
Interest Rate Cash Flow Hedge Liability at Fair Value		$ 1,200,000