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Stockholders' Equity - June 2021 Equity Offering (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Amount paid for clearing fees $ 18          
Offering costs paid on the issuance of common stock and warrants   $ 334 $ 469 $ 334 $ 469  
Institutional investors            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Sale of common stock (in shares) 990,100          
Sale of common stock (USD per share) $ 5.05   $ 5.05   $ 5.05  
Amount paid for placement agent commissions $ 400          
Amount paid related to expenses for registered direct offering and concurrent private placement 51          
Offering costs paid on the issuance of common stock and warrants           $ 469
Proceeds from sale of common stock and warrants $ 4,500