SEGMENT REPORTING, GEOGRAPHIC INFORMATION, AND SIGNIFICANT CUSTOMERS - Summary of Revenues by Geographic Revenue by Country (Detail) - Revenues - Geographic concentration risk	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Concentration Risk [Line Items]
Concentration risk	100.00%	100.00%
Korea
Concentration Risk [Line Items]
Concentration risk	38.00%	49.00%
Japan
Concentration Risk [Line Items]
Concentration risk	29.00%	18.00%
United States of America
Concentration Risk [Line Items]
Concentration risk	12.00%	16.00%
GERMANY
Concentration Risk [Line Items]
Concentration risk	10.00%	6.00%
Other countries with less than 10% in a year
Concentration Risk [Line Items]
Concentration risk	11.00%	11.00%