Fair Value of Financial Instruments - Assets Measured or Disclosed at Fair Value on Recurring Basis (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Liabilities:
Derivative liability	$ 760,000	$ 1,820,000
Level 3
Assets:
Total assets fair value disclosure	0	0
Fair value measurements recurring
Assets:
Cash and cash equivalents	90,466,000	149,800,000
Total assets fair value disclosure	90,466,000	149,800,000
Liabilities:
Derivative liability	760,000	1,820,000
Total liabilities fair value disclosure	760,000	1,820,000
Fair value measurements recurring | Level 1
Assets:
Cash and cash equivalents	90,466,000	149,800,000
Total assets fair value disclosure	90,466,000	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	760,000	1,820,000
Total liabilities fair value disclosure	$ 760,000	$ 1,820,000