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Stock-Based Compensation - Restricted stock (Details) - $ / shares
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Mar. 31, 2022
Dec. 31, 2021
Sep. 30, 2021
Mar. 31, 2021
Sep. 30, 2020
Mar. 31, 2022
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]                  
Restricted stock granted (in shares)               0  
Restricted stock canceled (in shares)     (17,280)     (4,380)     (6,855)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]                  
Restricted stock cancelled (in dollars per share)     $ 3.98     $ 4.00     $ 4,000.00
Restricted Stock Awards (RSA)                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]                  
Restricted stock at beginning of period (in shares)           37,051   0 0
Restricted stock granted (in shares) 12,000 123,501 0     0     135,501
Restricted stock vested (in shares)   (98,450) 0     (37,051)     (98,450)
Restricted stock at end of period (in shares) 37,051   0     0   0 37,051
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]                  
Restricted stock at beginning of period (in dollars per share)           $ 4.00     $ 0
Restricted stock granted (in dollars per share)     $ 0     0     3.91
Restricted stock vested (in dollars per share)     $ 0     $ 4.00     3.88
Restricted stock at end of period (in dollars per share) $ 4.00               $ 4.00
Restricted Stock Units (RSUs)                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]                  
Restricted stock at beginning of period (in shares)           805,325   935,397 0
Restricted stock granted (in shares)     342,640 307,640 35,000 137,452 816,180   816,180
Restricted stock vested (in shares)     (305,982)     (3,000) (4,000)   (4,000)
Restricted stock at end of period (in shares) 805,325   954,775     935,397   954,775 805,325
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]                  
Restricted stock at beginning of period (in dollars per share)           $ 4,000.00   $ 3.96 $ 0
Restricted stock granted (in dollars per share)     $ 6.31     3.75     4,000.00
Restricted stock vested (in dollars per share)     3.98     3.75     4,000.00
Restricted stock at end of period (in dollars per share) $ 4,000.00   $ 4.61     $ 3.96   $ 4.61 $ 4,000.00