Description of Business, Basis of Presentation, Corporate Transactions, Significant Accounting Policies, and Recent Accounting Pronouncements - Corporate Transactions (10K Only) (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Gross Amount To Be Received From Transfer Of Project Agreement	$ 4,100
Other		$ 1,309	$ 592