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Stockholders' Equity - Summary of Common Stock Warrant Activity (Details) - Warrants - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Class Of Stock [Line Items]    
Shares, Outstanding 86,000  
Shares, Warrants issued 2,307,000 86,000
Shares, Outstanding 2,393,000 86,000
Weighted Average Exercise Price, Outstanding $ 5.14  
Weighted Average Exercise Price, Warrants Issued 2.40 $ 5.14
Weighted Average Exercise Price, Outstanding $ 2.32 $ 5.14
Aggregate Fair Market Value at Issuance, Outstanding $ 194  
Aggregate Fair Market Value at Issuance, Warrants Issued 3,553 $ 194
Aggregate Fair Market Value at Issuance, Outstanding $ 3,747 $ 194
Weighted Average Remaining Contractual Life (In years), Outstanding 4 years 5 months 8 days 4 years 8 months 26 days
Weighted Average Remaining Contractual Life (In years), Warrants Issued 4 years 5 months 19 days 4 years 8 months 26 days