Note 9 - Credit Facilities (Details)	3 Months Ended
	Mar. 31, 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)(1)	5	[1]
Interest coverage ratio (EBITDA/interest expense)	3
Leverage ratio (total debt less unencumbered cash/EBITDA)(1)	5

[1] The leverage ratio was amended for 2016 to increase to 5.00:1, and will revert back to 4.00:1 in 2017.