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SIGNIFICANT ACCOUNTING POLICIES - Breakdown of net revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Device revenue
Total Device revenue	$ 25,605	$ 20,026	$ 19,263	$ 15,228	$ 14,162	$ 11,817	$ 10,297	$ 9,196	$ 80,122	$ 45,472
Devices [Member]
Device revenue
Purchased									6,390	4,035
Leased									14,879	6,678
Total Device revenue									$ 21,269	$ 10,713

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