Note 1 - Nature Of Operations And Summary Of Significant Accounting Policies (Detail) (USD $) In Thousands, unless otherwise specified	0 Months Ended	6 Months Ended	12 Months Ended
	Jan. 03, 2012	Dec. 31, 2011	Dec. 31, 2012	Jun. 30, 2011	Dec. 31, 2001
Number of Reportable Segments	1		3
Proceeds from Grantors (in Dollars)					$ 26,000
Deferred Revenue and Credits (in Dollars)		4,195	3,599
Shipping and Handling Revenue (in Dollars)		6,528	10,653	12,540
Research and Development Expense (in Dollars)		954	2,344	1,431
Debt Instrument, Fair Value Disclosure (in Dollars)		8,647	32,596
Long-term Debt and Capital Lease Obligations (in Dollars)		6,852	5,168
Formerly Directly Owned Subsidiaries [Member]
Number of Reportable Segments	3
Subsidiary Of Processing [Member]
Equity Method Investment, Ownership Percentage	30.00%
Minimum [Member] | Building And Improvements [Member]
Property, Plant and Equipment, Useful Life			20 years
Minimum [Member] | Transportation Equipment Assets [Member]
Property, Plant and Equipment, Useful Life			5 years
Minimum [Member] | Machinery Equipment [Member]
Property, Plant and Equipment, Useful Life			10 years
Maximum [Member] | Building And Improvements [Member]
Property, Plant and Equipment, Useful Life			40 years
Maximum [Member] | Transportation Equipment Assets [Member]
Property, Plant and Equipment, Useful Life			6 years
Maximum [Member] | Machinery Equipment [Member]
Property, Plant and Equipment, Useful Life			12 years
Reimbursment [Member]
Proceeds from Grantors (in Dollars)			1,250
Reimbursment Of Maintenance Costs [Member]
Deferred Revenue and Credits (in Dollars)			568
Short And Longterm Debt [Member]
Long-term Debt and Capital Lease Obligations (in Dollars)		$ 8,522	$ 32,744