CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ (DEFICIT) EQUITY - USD ($)	Convertible preferred stock	Common Stock Seattle Genetics, Inc., (“SGEN”)	Common Stock	Capital Contributed in Excess of Par Seattle Genetics, Inc., (“SGEN”)	Capital Contributed in Excess of Par	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest	Seattle Genetics, Inc., (“SGEN”)	Total
Beginning balance at Jun. 30, 2014			$ 931,134		$ 300,080,804	$ (458,370)	$ (261,465,638)	$ 261,837	$ (490,369)		$ 38,859,398
Beginning balance, Shares at Jun. 30, 2014			93,113,480
Exercise of stock options, net			$ 12,026		2,947,904						$ 2,959,930
Exercise of stock options, Shares			1,202,575								1,202,575
Stock based compensation			$ 2,305		2,200,646						$ 2,202,951
Stock based compensation, Shares			230,523
Other comprehensive income (loss)								(422,929)			(422,929)
Net loss							(48,002,366)		(121,605)		(48,123,971)
Ending balance at Jun. 30, 2015			$ 945,465		305,229,354	(458,370)	(309,468,004)	(161,092)	(611,974)		(4,524,621)
Ending balance, Shares at Jun. 30, 2015			94,546,578
Exercise of stock options, net			$ 10,975		2,721,987						$ 2,732,962
Exercise of stock options, Shares			1,097,500								1,097,500
Stock based compensation			$ 2,232		3,369,310						$ 3,371,542
Stock based compensation, Shares			223,220
Other comprehensive income (loss)								28,866			28,866
Net loss							(59,036,950)		(98,766)		(59,135,716)
Ending balance at Jun. 30, 2016			$ 958,672		311,320,651	(458,370)	(368,504,954)	(132,226)	(710,740)		(57,526,967)
Ending balance, Shares at Jun. 30, 2016			95,867,298
Issuance of preferred stock, net	$ 10,000				121,771,941						121,781,941
Issuance of preferred stock, Shares	1,000,000
Issuance of common stock, net		$ 30,000	$ 100,000	$ 14,670,000	28,478,473					$ 14,700,000	28,578,473
Issuance of common stock, Shares		3,000,000	10,000,000
Exercise of stock options, net			$ 12,794		4,277,309						$ 4,290,103
Exercise of stock options, Shares			1,279,354								1,279,354
Stock based compensation			$ 1,980		3,784,427						$ 3,786,407
Stock based compensation, Shares			197,991
Warrant liability				$ (14,670,000)	(6,966,435)					$ (14,670,000)	(6,966,435)
Other comprehensive income (loss)								(170,484)			(170,484)
Net loss							(153,205,945)		(60,341)		(153,266,286)
Ending balance at Jun. 30, 2017	$ 10,000		$ 1,103,446		$ 462,666,366	$ (458,370)	$ (521,710,899)	$ (302,710)	$ (771,081)		$ (59,463,248)
Ending balance, Shares at Jun. 30, 2017	1,000,000		110,344,643