Note 3 - Net Loss Per Share - Earnings Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Jun. 30, 2016
Basic and diluted, Net loss attributable to Progenics	$ (16,636)	$ (16,636)	$ (5,638)	$ (5,638)	$ (32,996)	$ (18,293)
Weighted-average shares - basic and diluted (in shares)	70,202	70,202	69,947	69,947	70,214	69,947
Net loss per share attributable to Progenics - basic and diluted (in dollars per share)	$ (0.24)	$ (0.24)	$ (0.08)	$ (0.08)	$ (0.47)	$ (0.26)