Summary of Significant Accounting Policies Intangible asset (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	$ 19,716,000	$ 0
Finite-lived Intangible Assets, Fair Value Disclosure		$ 18,500,000
Goodwill and Intangible Asset Impairment	$ 28,638,000