Note 7 - Fair Value of Financial Instruments (Details) - Fair Value Measurements, Recorded (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Assets:
Embedded customer derivatives	$ 743	$ 113
Total assets at fair value	743	113
Liabilities:
Nickel swaps	798	168
Total liabilities at fair value	1,904	1,555
Fixed Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities:
Interest rate swap	794
Fixed Interest Rate Swap [Member]
Liabilities:
Interest rate swap	794
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities:
Interest rate swap	312	446
Interest Rate Swap [Member]
Liabilities:
Interest rate swap	312	446
Fixed Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities:
Interest rate swap		941
Fixed Interest Rate Swap [Member]
Liabilities:
Interest rate swap		941
Fair Value, Inputs, Level 2 [Member]
Assets:
Embedded customer derivatives	743	113
Total assets at fair value	743	113
Liabilities:
Nickel swaps	798	168
Total liabilities at fair value	$ 1,904	$ 1,555