Note 7 - Acquisition of EGEN, Inc. (Details) - Fair Value of Consideration (USD $)	6 Months Ended	0 Months Ended
	Jun. 30, 2014	Jun. 06, 2014 EGEN, Inc. [Member]	Jun. 06, 2014 EGEN, Inc. [Member]
Consideration Paid at Closing
Cash, net of cash acquired	$ 2,820,849		$ 2,821,000
Celsion common stock (2,712,188 shares valued at $3.48 which was the last closing price of our common stock at the time of closing the transaction on June 20, 2014)			9,438,000
Future Consideration
Holdback Shares (670,070 shares of Celsion common stock which were discounted by 38% to reflect the cost of the restriction)			1,441,000
Earnout Payments (at fair value*)			13,878,000	[1]
Total fair value of consideration		$ 27,600,000	$ 27,578,000

[1] The difference between the aggregate $30.4 million in future Earnout Payments and the $13.9 million included in the fair value of the acquisition consideration was based on the Company's risk-adjusted assessment of each milestone and utililizing a discount rate based on the estimated time to achieve the milestone.