Amount of loss contingency liability.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349

Name:	us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

COMMITMENTS AND CONTINGENCIES - Additional Information (Details) $ in Millions	Sep. 23, 2009	Sep. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Loss contingency, legal proceedings
Accrued liabilities for contingencies		$ 2.6	$ 9.6
Speed Track Inc [Member]
Loss contingency, legal proceedings
Loss Contingency, Number of Defendants	27