Note 2 - Significant Accounting Policies (Details Textual) - USD ($)			3 Months Ended	12 Months Ended
	Mar. 31, 2016	Oct. 15, 2014	Dec. 31, 2015	Dec. 31, 2015
Vessels and Vessel Improvements [Member]
Impairment of Long-Lived Assets Held-for-use				$ 50,872,734
Minimum [Member]
Deferred Dry Docking Costs, Amortization Period				2 years 180 days
Property, Plant and Equipment, Useful Life				3 years
Maximum [Member]
Deferred Dry Docking Costs, Amortization Period				5 years
Property, Plant and Equipment, Useful Life				10 years
Taxes as a Result of SEC 883 Non-qualification [Member]
Income Tax Expense (Benefit)				$ 300,000
Reclassification of Deferred Financing Costs to Reduction of Long-term Debt [Member] | Subsequent Event [Member]
Current Period Reclassification Adjustment	$ 400,000
Available-for-sale Securities, Equity Securities			$ 0	0
Restricted Cash and Cash Equivalents			141,161	$ 141,161
Impairment of Long-Lived Assets Held-for-use		$ 842,625,000	$ 50,872,734