Revenue Recognition - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2012
Deferred Revenue Disclosure [Abstract]
Amount of non-refundable option fee	$ 500,000
Sublicense execution payment			175,000
Navidea common stock value	306,357	306,357	1,146,000
Navidea common stock, shares	1,150,000		300,000
Patent expiration date	Jun. 30, 2030
Unearned revenue recorded as current liability	73,731	73,730
Unearned revenue recorded as long-term liability	1,142,816	1,216,547
Contingent milestone payments	2,900,000
Milestone payments	$ 2,500,000
Issuance of additional common stock	550,000
Issuance of additional shares when certain cumulative net sales of the approved product are achieved	400,000
Royalties based on net sales, Lower range	10.00%
Royalties based on net sales, Upper range	14.00%
Obligation to pay milestone payments to Harvard, percentage	5.00%
Obligation to pay royalties to Harvard, percentage	2.00%