Note 11 - Fair Value of Financial Instruments (Detail) - Fair Value Measurements, Recorded (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Embedded customer derivatives	$ 113	$ 55
Total assets at fair value	113	55
Nickel swaps	168	55
Total liabilities at fair value	1,555	547
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
Interest rate swap	446	492
Interest Rate Swap [Member]
Interest rate swap	446	492
Fixed Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
Interest rate swap	941
Fixed Interest Rate Swap [Member]
Interest rate swap	941
Fair Value, Inputs, Level 2 [Member]
Embedded customer derivatives	113	55
Total assets at fair value	113	55
Nickel swaps	168	55
Total liabilities at fair value	$ 1,555	$ 547