Summary of Significant Accounting Policies Summary of Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Concentration risk, number of major customers	3
Concentration Risk, Percentage of Gross Revenue	94.00%
Payments of public offering costs	$ 4,465	$ 0
Payments for Initial Public Offering Costs	0	9,422
Capitalized costs, public offering costs	$ 400	$ 0
Concentration Risk, Percentage of Accounts Receivable	97.00%