Note 3 - Vessels - Vessels and Vessel Improvements (Details) - USD ($)	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Vessels and Vessel Improvements [Member] | Successor [Member]
Vessels and vessel improvements at beginning of period		$ 733,960,731		$ 733,960,731
Purchase of vessel improvements				199,675
Disposal of vessels				(13,102,860)
Depreciation expense				(26,469,088)
Vessel impairment charge				(6,167,262)
Vessels and vessel improvements at end of period	$ 688,421,196			688,421,196		$ 733,960,731
Vessels and Vessel Improvements [Member]
Vessel impairment charge		(6,167,262)				(50,872,734)
Vessels and vessel improvements at beginning of period		$ 733,960,731		733,960,731
Vessel impairment charge				(6,167,262)
Vessels and vessel improvements at end of period	$ 688,421,196			$ 688,421,196		$ 733,960,731