CONTINGENCIES (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2022
Product warranty accrual [Roll Forward]
Accrual balance at beginning of year		$ 941	$ 1,219
Accruals for product warranties		534	541
Cost of warranty claims		(633)	(784)
Accrual balance at end of period	$ 842	842	$ 976
Standby Letters of Credit [Member] | Office Space - Burlington, Massachusetts [Member]
Loss Contingencies [Line Items]
Loss Contingency, Range of Possible Loss, Portion Not Accrued	700	700
Standby Letters of Credit [Member] | Office Space - Other Facilities [Member]
Loss Contingencies [Line Items]
Letters of Credit Outstanding, Amount	400	400
Standby Letters of Credit [Member] | Other Operating Obligations [Member]
Loss Contingencies [Line Items]
Letters of Credit Outstanding, Amount	3,400	3,400
Research and Development Arrangement [Member]
Loss Contingencies [Line Items]
Long-term Purchase Commitment, Amount	$ 32,200
Long-term Purchase Commitment, Period	5 years
Other Inventory, Purchased Goods, Gross	$ 25,100	$ 25,100