Note 12 - Subsequent Event (Details Textual)	Nov. 02, 2015 USD ($) a	Sep. 30, 2015 USD ($)
Subsequent Event [Member] | Cost Saving Initiatives [Member]
Annual Fixed Costs	$ 18,000,000
Expected Annual Fixed Costs Maximum	$ 5,000,000
Subsequent Event [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Property in Shoshone County, ID [Member]
Area of Real Estate Property | a	1,000
Subsequent Event [Member]
Exclusive Supply Agreement, Term	5 years
Initial Purchase Order	$ 5,000,000
Product Delivery Period	1 year 180 days
Exclusive Supply Agreement, Additional Term	5 years
Additional Purchase Order	$ 8,000,000
Additional Product Delivery Period	2 years
Initial Purchase Order		$ 5