Note 14 - Celsion Employee Benefit Plans (Details) (USD $)	12 Months Ended			123 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2018
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	$ 56,875	$ 57,239	$ 60,360