Note 8 - Fair Value Measurements, Not Recorded (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Industrial Revenue Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Liabilities
IRB	$ 2,690,000	$ 3,530,000
Industrial Revenue Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities
IRB
Industrial Revenue Bonds [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities
IRB
Industrial Revenue Bonds [Member]
Liabilities
IRB	$ 2,690,000	$ 3,530,000
Fair Value, Inputs, Level 1 [Member] | A B L Credit Facility [Member]
Liabilities
ABL Credit Facility
Fair Value, Inputs, Level 1 [Member] | Carrying Value [Member]
Liabilities
Total liabilities not recorded at fair value	$ 2,690,000	$ 3,530,000
Fair Value, Inputs, Level 2 [Member] | A B L Credit Facility [Member]
Liabilities
ABL Credit Facility	145,800,000	244,090,000
Fair Value, Inputs, Level 2 [Member] | Carrying Value [Member]
Liabilities
Total liabilities not recorded at fair value	$ 145,800,000	$ 244,090,000
Fair Value, Inputs, Level 3 [Member] | A B L Credit Facility [Member]
Liabilities
ABL Credit Facility
Fair Value, Inputs, Level 3 [Member] | Carrying Value [Member]
Liabilities
Total liabilities not recorded at fair value
A B L Credit Facility [Member]
Liabilities
ABL Credit Facility	$ 145,800,000	$ 244,090,000
Carrying Value [Member]
Liabilities
Total liabilities not recorded at fair value	148,490,000	247,620,000
ABL Credit Facility	$ 145,800,000	$ 244,090,000