Summary of Significant Accounting Policies - Income Taxes/Recent Accounting Pronouncements (Details)	12 Months Ended
	Dec. 31, 2020 USD ($) real_estate_property lease	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Accounting Policies [Abstract]
Number of finance lease property | real_estate_property	1
Number of leases | lease	4
Operating lease right-of-use assets	$ 821,000	$ 139,000
Lease liability	793,000	143,000
Interest and penalties related to uncertain tax positions	$ 0	$ 0	$ 0
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssets	us-gaap:OtherAssets
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilities	us-gaap:OtherLiabilities