Document and Entity Information - USD ($)	12 Months Ended
	Jun. 30, 2021	Sep. 13, 2021	Dec. 31, 2020
Cover [Abstract]
Entity Registrant Name	ASTROTECH Corp
Entity Central Index Key	0001001907
Trading Symbol	ASTC
Entity Voluntary Filers	No
Current Fiscal Year End Date	--06-30
Entity Filer Category	Non-accelerated Filer
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding		49,450,558
Entity Public Float			$ 29,373,426
Document Type	10-K
Document Period End Date	Jun. 30, 2021
Amendment Flag	false
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021
Entity Current Reporting Status	Yes
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity File Number	001-34426
Entity Tax Identification Number	91-1273737
Entity Address, Address Line One	2105 Donley Drive
Entity Address, Address Line Two	#100
Entity Address, City or Town	Austin
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	78758
City Area Code	512
Local Phone Number	485-9530
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common Stock $0.001 per share
Security Exchange Name	NASDAQ
Entity Incorporation, State or Country Code	DE
Document Annual Report	true
Document Transition Report	false