REVENUE RECOGNITION - Summary of Disaggregated Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation Of Revenue [Line Items]
Total revenue	$ 1,533	$ 358	$ 3,042	$ 689
Device
Disaggregation Of Revenue [Line Items]
Total revenue	1,168	152	2,360	321
Device | Point In Time
Disaggregation Of Revenue [Line Items]
Total revenue	1,168	152	2,360	321
Service
Disaggregation Of Revenue [Line Items]
Total revenue	365	206	682	368
Service | Over Time
Disaggregation Of Revenue [Line Items]
Total revenue	$ 365	$ 206	$ 682	$ 368