Note 9 - Senior Notes, Credit Facilities, Note Payable and Capital Leases (Details) - Credit Facilities	9 Months Ended
	Sep. 30, 2015	Jun. 30, 2015
London Interbank Offered Rate (LIBOR) [Member]
Interest rates:
Variable rate	3.25%
Base Rate [Member]
Interest rates:
Variable rate	2.25%
Minimum [Member]
Covenant financial ratios:
Interest coverage ratio (EBITDA/interest expense)	3.00%	1.00%
Minimum [Member] | New Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest rates:
Variable rate	2.25%
Minimum [Member] | New Facility [Member] | Base Rate [Member]
Interest rates:
Variable rate	1.25%
Maximum [Member]
Covenant financial ratios:
Senior leverage ratio (debt secured by liens/EBITDA)	2.50%	1.00%
Leverage ratio (total debt less unencumbered cash/EBITDA)	4.00%	1.00%
Maximum [Member] | New Facility [Member]
Interest rates:
Standby fee per annum on undrawn amounts	0.50%