Cash Equivalents And Restricted Cash And Securities (Tables)

3 Months Ended

Mar. 31, 2020

Cash Equivalents And Restricted Cash And Securities [Abstract]

Summary Of Cash Equivalents And Restricted Securities

			Unrealized		Estimated
			Holding		Market
March 31, 2020	Cost Basis		Gains		Value
Cash equivalents:
Money market funds	$	1,478	$	--	$	1,478
Restricted securities:
Money market funds		494		--		494
Total	$	1,972	$	--	$	1,972
			Unrealized		Estimated
			Holding		Market
December 31, 2019	Cost Basis		Gains		Value
Cash equivalents:
Money market funds	$	1,472	$	--	$	1,472
Restricted securities:
Money market funds		528		--		528
Total	$	2,000	$	--	$	2,000