Note 1 - Summary of Significant Accounting Policies (Detail) (USD $)		12 Months Ended						4 Months Ended	20 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012 Building and Building Improvements [Member] Minimum [Member]	Dec. 31, 2012 Building and Building Improvements [Member] Maximum [Member]	Dec. 31, 2012 Transportation Equipment [Member] Minimum [Member]	Dec. 31, 2012 Transportation Equipment [Member] Maximum [Member]	Dec. 31, 2012 Other Machinery and Equipment [Member] Minimum [Member]	Dec. 31, 2012 Other Machinery and Equipment [Member] Maximum [Member]	Apr. 30, 2011 2005 Model and Newer Trailer [Member]	Dec. 31, 2012 2005 Model and Newer Trailer [Member]	Dec. 31, 2012 Pre-tax Basis [Member] Change of Depreciation Method [Member]	Dec. 31, 2012 Top Ten Customers [Member]	Dec. 31, 2011 Top Ten Customers [Member]
Entity-Wide Revenue, Major Customer, Percentage											29.00%	31.00%
Property, Plant and Equipment, Useful Life		5 years	39 years 6 months	3 years	10 years	3 years	20 years	10 years	14 years
Property, Plant, and Equipment, Salvage Value (in Dollars)									$ 500
Property, Plant and Equipment, Salvage Value, Percentage								25.00%
Self-insurance Retention Levels, Workers' Compensation Claims Per Occurrence (in Dollars)	500,000
Self-insurance Retention Levels, Cargo Loss and Damage Claims Per Occurrence (in Dollars)	50,000
Self-insurance Retention Levels, Bodily Injury and Property Damage Claims Per Occurrence (in Dollars)	1,000,000
Self-insurance Retention Levels, Medical Benefits Per Plan Participant (in Dollars)	250,000
Reclassification Due To Change In Estimate (in Dollars)										$ 1,400,000