INCOME TAXES - COMPONENTS OF NET DEFERRED TAX ASSETS (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Income taxes
Balance of future tax benefits	$ 2.4	$ 1.1
Balance of future tax benefits, deferred tax effect	0.5	1.7
Domestic tax authority
Income taxes
Federal tax credit carryforwards	0.0	0.0
Federal tax credit carryforwards, deferred tax effect	0.3	1.3
State and local jurisdiction
Income taxes
Net operating loss carryforwards	2.4	1.1
Net operating loss carryforwards, deferred tax effect	$ 0.2	$ 0.4