REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Total revenue	$ 3,076	$ 3,095	$ 5,934	$ 18,096
United States
Disaggregation of Revenue [Line Items]
Total revenue	2,175	710	3,865	1,207
Japan
Disaggregation of Revenue [Line Items]
Total revenue	137	156	519	638
Germany
Disaggregation of Revenue [Line Items]
Total revenue	127	1,186	302	13,990
Canada
Disaggregation of Revenue [Line Items]
Total revenue	130	268	271	572
Other
Disaggregation of Revenue [Line Items]
Total revenue	507	775	977	1,690
Revenue recognized over time
Disaggregation of Revenue [Line Items]
Total revenue	2,797	3,082	5,614	5,419
Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	279	13	320	12,677
System sales
Disaggregation of Revenue [Line Items]
Total revenue	255	1,025	341	13,672
QCaaS
Disaggregation of Revenue [Line Items]
Total revenue	1,860	1,241	3,619	2,774
Professional services
Disaggregation of Revenue [Line Items]
Total revenue	929	785	1,912	1,562
Other revenue
Disaggregation of Revenue [Line Items]
Total revenue	$ 32	$ 44	$ 62	$ 88