ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES - DISAGGREGATED REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue
Revenue	$ 47,052	$ 59,628	$ 88,242	$ 110,231
Product revenues | Hardware
Disaggregation of Revenue
Revenue	43,781	56,569	81,999	103,863
Product revenues | Software
Disaggregation of Revenue
Revenue	621	1,038	1,085	2,556
Service revenues | Professional services
Disaggregation of Revenue
Revenue	445	479	827	833
Service revenues | Maintenance and subscription services
Disaggregation of Revenue
Revenue	$ 2,205	$ 1,542	4,331	$ 2,979
Bill and hold arrangements
Disaggregation of Revenue
Revenue			$ 100