Note 4 - Related Party Transactions (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 4 - Related Party Transactions (Details) [Line Items]
Accounts Payable, Related Parties	$ 19,000	$ 0
Purchase Of Fuel, Tires, and Related Services [Member]
Note 4 - Related Party Transactions (Details) [Line Items]
Related Party Transaction, Amounts of Transaction	562,000	585,000	988,000
Tire Purchases [Member]
Note 4 - Related Party Transactions (Details) [Line Items]
Related Party Transaction, Amounts of Transaction	1,400,000	1,600,000	1,700,000
Various Construction Projects [Member]
Note 4 - Related Party Transactions (Details) [Line Items]
Related Party Transaction, Amounts of Transaction			$ 495,000