Note 7 - Fair Value of Financial Instruments (Details) - Fair Value Measurements, Recorded (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Assets:
Embedded customer derivatives	$ 950	$ 113
Total assets at fair value	950	113
Liabilities:
Nickel swaps	1,006	168
Total liabilities at fair value	2,066	1,555
Fixed Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities:
Interest rate swap	728
Fixed Interest Rate Swap [Member]
Liabilities:
Interest rate swap	728
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities:
Interest rate swap	332	446
Interest Rate Swap [Member]
Liabilities:
Interest rate swap	332	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	950	113
Total assets at fair value	950	113
Liabilities:
Nickel swaps	1,006	168
Total liabilities at fair value	$ 2,066	$ 1,555