Note 14 - Celsion Employee Benefit Plans (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2008	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Disclosure Text Block Supplement [Abstract]
Minimum Age For Employee Benefit Plan		21
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	3.00%
Defined Benefit Plan, Contributions by Employer		$ 80,408	$ 56,875	$ 57,239