BALANCE SHEET DETAILS - Other Assets, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Other Assets, Net [Abstract]
Contract assets - long-term	$ 545	$ 1,746	$ 4,600
Lease right-of-use assets	360	912
Other assets	11	36
Total other assets	$ 916	$ 2,694