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Stockholders' Equity - Equity Issuances (Details) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 9 Months Ended
Mar. 31, 2019
Sep. 30, 2022
Jun. 04, 2021
Sep. 30, 2019
Lincoln Park Agreement        
Class of Stock [Line Items]        
Aggregate offering amount authorized per agreement       $ 26.0
Commitment shares issued as consideration per agreement (in shares) 181,510      
Number of shares sold (in shares) 250,000      
Price of shares sold (in dollars per share)       $ 4.00
Gross price for stock transaction $ 1.0      
Term of agreement (in months) 36 months      
Number of shares allowable to direct for Regular Purchase (in shares)       100,000
Maximum obligation per directed purchase transaction for Regular Purchase       $ 2.5
Maximum shares allowed in Accelerated Purchase as percent of shares In Regular Purchase (percent)       300.00%
Maximum shares allowed in Accelerated Purchase as percent of shares traded during specified period (percent)       30.00%
Maximum beneficial ownership allowable per agreement (percent)       9.99%
ATM Agreement        
Class of Stock [Line Items]        
Aggregate offering amount authorized per agreement     $ 50.0  
Stock issued (shares)   0