REVENUE - Additional disclosures (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
REVENUE
Revenue	$ 6,759,000	$ 7,841,000
Deferred revenue	3,200,000		$ 3,600,000
Contract assets	0		0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
REVENUE
Revenue expected to be earned			$ 3,300,000
Revenue expected to be earned period			12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01
REVENUE
Revenue expected to be earned	$ 2,900,000
Revenue expected to be earned period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
REVENUE
Revenue expected to be earned			$ 200,000
Revenue expected to be earned period			12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-04-01
REVENUE
Revenue expected to be earned	$ 300,000
Revenue expected to be earned period	48 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
REVENUE
Revenue expected to be earned			$ 100,000
Revenue expected to be earned period			36 months
International
REVENUE
Revenue	$ 960,000	1,172,000
CHINA
REVENUE
Revenue	$ 1,000	$ 300,000