LEASES - NARRATIVE (Details) ft² in Thousands, $ in Thousands	Mar. 12, 2020	Mar. 31, 2020 USD ($) ft²	Dec. 31, 2019 USD ($)
Leases
Operating lease liabilities		$ 4,075	$ 3,814
Right-of-use assets		$ 2,571	$ 2,202
SF Office
Leases
Area | ft²		5
Operating lease liabilities		$ 600
Operating lease, borrowing rate		3.50%
Right-of-use assets		$ 600
Neato Robotics, Inc.
Lessor Sublease
Number of days for landlord's consent	15 days
Number of days for sublease to commence after premises is delivered	15 days