Note 12 - Commitments and Contingencies (Detail) (USD $)	Dec. 31, 2012
Operating Leases, Future Minimum Payments Due	$ 919,000
Revenue Equipment [Member]
Purchase Commitment, Remaining Minimum Amount Committed	$ 1,700,000

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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The floor amount as of the balance sheet date that the entity must expend to satisfy the terms of disclosed arrangements (excluding long-term commitments) in which the entity has agreed to expend funds to procure goods or services from one or more suppliers, other than under a long-term purchase commitment or an unconditional purchase obligation.

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