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Stock-Based Compensation - Restricted Stock Awards (Details) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Weighted Average Grant-Date Fair Value    
Stock based compensation expenses $ 315,000 $ 943,000
Unrecognized stock-based compensation expenses $ 100,000  
Unvested restricted stock awards    
Number of Shares    
Outstanding at beginning of period (in shares) 7,118 13,345
Forfeited (in shares) (6,227) (6,227)
Outstanding at end of period (in shares) 891 7,118
Weighted Average Grant-Date Fair Value    
Outstanding at beginning of period (in dollars per share) $ 62.70 $ 62.70
Forfeited (in dollars per share) 0 62.70
Outstanding at end of period (in dollars per share) $ 62.70 $ 62.70
Vesting period 20 months  
Forfeited performance-based restricted stock awards (in shares) (891) (7,118)
Stock based compensation expenses $ 0 $ 0
Unrecognized stock-based compensation expenses 0  
Restricted stock awards - Performance based awards    
Weighted Average Grant-Date Fair Value    
Stock based compensation expenses $ (390,000) $ (390,000)