COMMITMENTS AND CONTINGENCIES (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) defendant	Dec. 31, 2014 defendant patent
Commitments and Contingencies Disclosure [Line Items]
Number of defendants with cases settled	2
Litigation settlement, amount awarded to other party | $	$ 1.3
Delaware Cases
Commitments and Contingencies Disclosure [Line Items]
Number of defendants		2
Washington Case
Commitments and Contingencies Disclosure [Line Items]
Number of defendants		1
Subsidiaries
Commitments and Contingencies Disclosure [Line Items]
Number of defendants		3
Quest Integrity
Commitments and Contingencies Disclosure [Line Items]
Number of lawsuits | patent		3