Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details) £ in Thousands	Jun. 30, 2020 USD ($)	Jun. 30, 2020 GBP (£)	Dec. 31, 2019 USD ($)
Accounting Policies [Abstract]
Cash and cash equivalents	$ 30,502,390		$ 30,980,473
FDIC insured amount	$ 250,000
FSCS insured amount | £		£ 85