Document and Entity Information - shares	6 Months Ended
	Dec. 31, 2020	Feb. 12, 2021
Cover [Abstract]
Entity Registrant Name	ASTROTECH Corp
Entity Central Index Key	0001001907
Trading Symbol	ASTC
Current Fiscal Year End Date	--06-30
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Document Type	10-Q
Document Period End Date	Dec. 31, 2020
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		19,731,600
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	001-34426
Entity Tax Identification Number	91-1273737
Entity Address, Address Line One	2028 E. Ben White Blvd.
Entity Address, Address Line Two	Suite 240-9530
Entity Address, City or Town	Austin
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	78741
City Area Code	512
Local Phone Number	485-9530
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common Stock, $0.001 par value per share
Security Exchange Name	NASDAQ
Entity Incorporation, State or Country Code	DE
Document Quarterly Report	true
Document Transition Report	false