Note 7 - Changes to Maximum Leverage Ratio (Details)	Feb. 18, 2016	Dec. 31, 2015
As of December 31, 2015 [Member]
Leverage Ratio	4
March 31, 2016 [Member]
Leverage Ratio	4.25
June 30, 2016 [Member]
Leverage Ratio	5.25
September 30, 2016 [Member]
Leverage Ratio	5.5
December 31, 2016 [Member]
Leverage Ratio	5.5
March 31, 2017 [Member]
Leverage Ratio	5.25
June 30, 2017 [Member]
Leverage Ratio	5.25
September 30, 2017 [Member]
Leverage Ratio	5
December 31, 2017 [Member]
Leverage Ratio	5
March 31, 2018 [Member]
Leverage Ratio	4.75
June 30, 2018 [Member]
Leverage Ratio	3.75
September 30, 2018 & Thereafter [Member]
Leverage Ratio	3.5
Leverage Ratio		4.25