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Cash Equivalents And Restricted Cash And Securities (Tables)

3 Months Ended

Mar. 31, 2019

Cash Equivalents And Restricted Cash And Securities [Abstract]

Summary Of Cash Equivalents And Restricted Cash And Securities


				Unrealized			Estimated
				Holding			Market
March 31, 2019	Cost Basis			Gains			Value
Cash equivalents:
Money market funds	$	1,450		$	--		$	1,450
Restricted securities:
Money market funds		731			--			731

				Unrealized			Estimated
				Holding			Market
December 31, 2018	Cost Basis			Gains			Value
Cash equivalents:
Money market funds	$	1,445		$	--		$	1,445
Restricted securities:
Money market funds		747			--			747