UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net Loss	$ (7,350)	$ (7,855)	$ (22,227)	$ (26,826)
Unrealized Gain (Loss) on Available-for-Sale Debt Instrument Investments	2	6	(11)	10
Foreign Currency Translation Adjustments	1	(1)	8	(1)
Comprehensive Loss	$ (7,347)	$ (7,850)	$ (22,230)	$ (26,817)

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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