Note 14 - Celsion Employee Benefit Plans (Details Textual)	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Minimum Age For Employee Benefit Plan	21
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	3.00%
Defined Benefit Plan, Contributions by Employer	$ 82,391	$ 80,408