Note 12 - Leases and Commitments (Details) (USD $)	May 31, 2012	Jun. 30, 2013 Revenue and Non-revenue Equipment [Member]	Jun. 30, 2013 Cancellable Upon Advanced Written Notice [Member]
Note 12 - Leases and Commitments (Details) [Line Items]
Purchase Obligation	$ 360,000	$ 40,400,000	$ 17,700,000