Cash Equivalents And Restricted Securities (Tables)

9 Months Ended

Sep. 30, 2020

Cash Equivalents And Restricted Securities [Abstract]

Summary Of Cash Equivalents And Restricted Securities

			Unrealized		Estimated
			Holding		Market
September 30, 2020	Cost Basis		Gains		Value
Cash equivalents:
Money market funds	$	11,483	$	--	$	11,483
Restricted securities:
Money market funds		513		--		513
Total assets	$	11,996	$	--	$	11,996
			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 assets	$	2,000	$	--	$	2,000