Financial Statement Schedules - Schedule II - Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2019

Valuation And Qualifying Accounts [Abstract]

Financial Statement Schedules - Schedule II - Valuation and Qualifying Accounts

2. Financial Statements Schedule:

Schedule II: Valuation and Qualifying Accounts (in thousands)

Allowance for Doubtful Accounts and Reserve for Uncollectible    Advances	Balance at Beginning of Year		Charges to Expense		Write-Offs, Net of Recoveries			Balance at End of Year
Year Ended December 31, 2019	$	2,653	$	148	$	(2,801	)	$	—
Year Ended December 31, 2018		—		3,215		(562	)		2,653
Year Ended December 31, 2017		—		—		—			—

All other schedules have been omitted because they are not required, not applicable, or the required information is otherwise included.