BALANCE SHEET COMPONENTS - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Intangible assets, amortization period			4 years 7 months 6 days
Intangible assets, gross carrying amount, total	$ 48,683		$ 48,683		$ 48,704
Intangible assets, accumulated amortization, total	(35,550)		(35,550)		(33,084)
Intangible assets, net carrying amount, total	13,133		13,133		15,620
Total amortization of acquired intangible assets	780	$ 902	2,466	$ 2,659
Customer Relationships
Intangible assets, gross carrying amount, total	9,506		9,506		9,508
Intangible assets, accumulated amortization, total	(7,772)		(7,772)		(7,335)
Intangible assets, net carrying amount, total	1,734		$ 1,734		2,173
Customer Relationships | Minimum
Amortization Period (Year)			1 year
Customer Relationships | Maximum
Amortization Period (Year)			10 years
Developed Technology
Intangible assets, gross carrying amount, total	34,631		$ 34,631		34,650
Intangible assets, accumulated amortization, total	(23,983)		(23,983)		(22,094)
Intangible assets, net carrying amount, total	10,648		$ 10,648		12,556
Developed Technology | Minimum
Amortization Period (Year)			4 years
Developed Technology | Maximum
Amortization Period (Year)			9 years
Tradename and Trademarks
Intangible assets, gross carrying amount, total	1,598		$ 1,598		1,598
Intangible assets, accumulated amortization, total	(1,100)		(1,100)		(1,025)
Intangible assets, net carrying amount, total	498		$ 498		573
Tradename and Trademarks | Minimum
Amortization Period (Year)			2 years
Tradename and Trademarks | Maximum
Amortization Period (Year)			10 years
Patent
Intangible assets, gross carrying amount, total	2,100		$ 2,100		2,100
Intangible assets, accumulated amortization, total	(1,847)		(1,847)		(1,782)
Intangible assets, net carrying amount, total	253		$ 253		318
Patent | Minimum
Amortization Period (Year)			6 years
Patent | Maximum
Amortization Period (Year)			10 years
Noncompetition Agreements
Amortization Period (Year)			3 years
Intangible assets, gross carrying amount, total	848		$ 848		848
Intangible assets, accumulated amortization, total	(848)		(848)		$ (848)
Costs of Revenues
Amortization of acquired technology included under Costs of revenues	584	574	1,752	1,680
Costs and Expenses
Amortization of acquired intangible assets presented separately under costs and expenses	$ 196	$ 328	$ 714	$ 979