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Fair Value of Financial Instruments - Assets Measured or Disclosed at Fair Value on Recurring Basis (Details) - USD ($)
Mar. 31, 2022
Dec. 31, 2021
Liabilities:    
Derivative liability $ 1,110,000 $ 1,820,000
Level 3    
Assets:    
Total assets fair value disclosure 0 0
Fair value measurements recurring    
Assets:    
Cash and cash equivalents 174,562,000 149,800,000
Total assets fair value disclosure 174,562,000 149,800,000
Liabilities:    
Derivative liability 1,110,000 1,820,000
Total liabilities fair value disclosure 1,110,000 1,820,000
Fair value measurements recurring | Level 1    
Assets:    
Cash and cash equivalents 174,562,000 149,800,000
Total assets fair value disclosure 174,562,000 149,800,000
Liabilities:    
Derivative liability 0 0
Total liabilities fair value disclosure 0 0
Fair value measurements recurring | Level 2    
Assets:    
Cash and cash equivalents 0 0
Total assets fair value disclosure 0 0
Liabilities:    
Derivative liability 0 0
Total liabilities fair value disclosure 0 0
Fair value measurements recurring | Level 3    
Assets:    
Cash and cash equivalents 0 0
Total assets fair value disclosure 0 0
Liabilities:    
Derivative liability 1,110,000 1,820,000
Total liabilities fair value disclosure $ 1,110,000 $ 1,820,000