Noncontrolling Interest - Changes in Equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period			$ 28,627
Stock based compensation			1,035
Share repurchases			(1,283)
Net change in available-for-sale securities			39
Net loss attributable to Astrotech Corporation	$ (2,800)	$ (3,742)	(8,818)	$ (9,632)
Net loss attributable to noncontrolling interest	(47)	$ (97)	(150)	$ (268)
Balance, end of period	19,450		19,450
Astrotech Corp Stockholders' Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period			28,667
Stock based compensation			1,035
Share repurchases			(1,283)
Net change in available-for-sale securities			39
Net loss attributable to Astrotech Corporation			(8,818)
Balance, end of period	19,640		19,640
Noncontrolling Interest in Subsidiary
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period			(40)
Net loss attributable to noncontrolling interest			(150)
Balance, end of period	$ (190)		$ (190)