COMMITMENTS AND CONTINGENCIES - Additional Information (Detail) $ in Millions			6 Months Ended
	Mar. 03, 2021 ft²	Sep. 10, 2019 Patent	Jun. 30, 2021 USD ($) ft²
Operating Leased Assets [Line Items]
Weighted-average remaining lease term			4 years 3 months 18 days
Weighted-average discount rate			7.70%
Number of patents infringes | Patent		2
Purchase commitments | $			$ 5.0
Lease Agreement | Oakwood Village, Ohio
Operating Leased Assets [Line Items]
Area of land			19,800
Lease agreement, expiration date			2026-10
Lease Agreement | Mountain View, California
Operating Leased Assets [Line Items]
Area of land			25,500
Lease agreement, expiration date			2025-07
Additional area of land			24,600
Additional area lease agreement, expiration date			2025-12
Lease Agreement | Maximum | Mountain View, California
Operating Leased Assets [Line Items]
Lease agreement, renewal term			5 years
Sub-Lease Agreement | Denver, Colorado
Operating Leased Assets [Line Items]
Area of land	12,800		19,800
Lease agreement, expiration date			2021-06
Lease commencement date			2019-06
Lease commencement date	Sep. 01, 2021
Lease agreement, expiration date	Oct. 31, 2024