Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2019

Financial Instruments [Abstract]

Summary Of Financial Instruments Measured At Fair Value

September 30, 2019	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	1,466	$	--	$	--	$	1,466
Restricted securities:
Money market funds		492		--		--		492
Endospan Loan		--		--		358		358
Total assets	$	1,958	$	--	$	358	$	2,316

December 31, 2018	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	1,445	$	--	$	--	$	1,445
Restricted securities:
Money market funds		747		--		--		747
Total assets	$	2,192	$	--	$	--	$	2,192

Reconciliation Of Changes In Fair Value Of Level 3 Liabilities

		Endospan Loan
Balance as of December 31, 2018	$	--
Initial value of Endospan Loan		358
Change in valuation of Endospan Loan		--
Balance as of September 30, 2019	$	358