Note 9 - Senior Notes, Credit Facility, and Capital Leases - Credit Facilities (Details)	9 Months Ended
	Sep. 30, 2016
New Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Variable rate	2.25%
New Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Variable rate	3.25%
New Facility [Member] | Base Rate [Member] | Minimum [Member]
Variable rate	1.25%
New Facility [Member] | Base Rate [Member] | Maximum [Member]
Variable rate	2.25%
New Facility [Member]
Standby fee per annum on undrawn amounts	0.50%
Maximum [Member]
Senior leverage ratio (debt secured by liens/EBITDA)	2.5
Leverage ratio (total debt less unencumbered cash/EBITDA)	5	[1]
Interest coverage ratio (EBITDA/interest expense)	3

[1] The leverage ratio will decrease to 4.00:1 in 2017.