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Document and Entity Information - USD ($)
 12 Months Ended
Jun. 30, 2019
Sep. 27, 2019
Dec. 31, 2018
Document And Entity Information [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   5,923,629  
Entity Public Float     $ 26,573,522
Document Type 10-K    
Document Period End Date Jun. 30, 2019    
Amendment Flag false    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2019    
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 911273737    
Entity Address, Address Line One 201 West 5th Street    
Entity Address, Address Line Two Suite 1275    
Entity Address, City or Town Austin    
Entity Address, State or Province Texas    
Entity Address, Postal Zip Code 78701    
City Area Code 512    
Local Phone Number 485-9530