Quarterly report pursuant to Section 13 or 15(d)

Offerings of Common Stock and Warrants - Common Stock and Warrants (Details)

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Offerings of Common Stock and Warrants - Common Stock and Warrants (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Sep. 04, 2019
Jun. 30, 2021
Jun. 30, 2020
Offerings of Common Stock and Warrants      
Registered Direct Offering, common stock, aggregate shares offered, shares (in shares) 580,000    
Registered Direct Offering, common stock, aggregate shares offered, share price (in dollars per share) $ 5.00    
Proceeds from issuance of common stock and warrants, Registered Direct Offering $ 5,100    
Proceeds from issuance of common stock and warrants, net of offering costs $ 4,600 $ 11,159 $ 1,376