Note 10 - Restructuring Costs (Details Textual)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2011 USD ($)
Operating Segments [Member] | Selling, General and Administrative Expenses [Member]
Asset Impairment Charges			$ 3,200,000
Severance Costs			700,000
Impairment of Real Estate			$ 5,000,000
Operating Segments [Member]
Restructuring and Related Cost, Incurred Cost	$ 900,000	$ 8,100,000
Restructuring and Related Cost, Number of Positions Eliminated			100
Asset Impairment Charges			$ 8,236,000		$ 1,000,000
Impairment of Real Estate	$ 400,000	$ 7,100,000