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BASIS OF PRESENTATION - Breakdown of net revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Device revenue
Total Device revenue	$ 24,127	$ 15,228
Devices [Member]
Device revenue
Purchased	2,332	1,280
Leased	4,033	2,164
Total Device revenue	$ 6,365	$ 3,444

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