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SIGNIFICANT ACCOUNTING POLICIES - Breakdown of net revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Device revenue
Total device revenue	$ 40,367	$ 34,785	$ 31,022	$ 24,127	$ 25,605	$ 20,026	$ 19,263	$ 15,228	$ 130,301	$ 80,122
Devices
Device revenue
Purchased									9,240	6,390
Leased									27,373	14,879
Total device revenue									$ 36,613	$ 21,269

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