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Revenues By Geographic Areas (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
United States
Revenues: (in thousands)	$ 12,137	$ 14,558
Europe
Revenues: (in thousands)	2,209	2,431
Asia and rest of world
Revenues: (in thousands)	1,354	2,264
Total
Revenues: (in thousands)	$ 15,700	$ 19,253

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