Note 3 - Net (Loss) Income Per Share - Calculations of Net (Loss) Income Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Basic and diluted, net loss attributable to Progenics	$ (15,352)	$ 36,303	$ (48,348)	$ 18,010
Basic and diluted, weighted average shares outstanding (in shares)	70,270	70,013	70,233	69,970
Basic and diluted, per share amount (in dollars per share)	$ (0.22)		$ (0.69)
Basic, net loss attributable to Progenics		$ 36,303		$ 18,010
Basic, weighted average shares outstanding (in shares)		70,013		69,970
Basic, per share amount (in dollars per share)	$ (0.22)	$ 0.52	$ (0.69)	$ 0.26
Dilutive effect of stock options, weighted average shares outstanding (in shares)		284		36
Diluted, net loss attributable to Progenics		$ 36,303		$ 18,010
Diluted, weighted average shares outstanding (in shares)	70,270	70,297	70,233	70,006
Diluted, per share amount (in dollars per share)	$ (0.22)	$ 0.52	$ (0.69)	$ 0.26