Note 17 - Commitments and Contingencies - Commitments (Details)	Mar. 31, 2016 USD ($)
Operating Leases, Future Minimum Payments Due, Current	$ 1,385,000
Purchase Obligation, Due in Next Twelve Months	24,489,000
Operating Leases, Future Minimum Payments, Due in Two Years	1,156,000
Purchase Obligation, Due in Second Year	845,000
Operating Leases, Future Minimum Payments, Due in Three Years	980,000
Purchase Obligation, Due in Third Year	0
Operating Leases, Future Minimum Payments, Due in Four Years	779,000
Purchase Obligation, Due in Fourth Year	0
Operating Leases, Future Minimum Payments, Due in Five Years	565,000
Purchase Obligation, Due in Fifth Year	0
Operating Leases, Future Minimum Payments, Due Thereafter	519,000
Purchase Obligation, Due after Fifth Year	0
Total minimum payments	5,384,000
Total minimum payments	$ 25,334,000