INCOME TAXES - Operating loss (Details) $ in Millions	Sep. 30, 2018 USD ($)
Federal
Operating Loss Carryforwards
Amount of net operating loss carryforwards	$ 50.8
State
Operating Loss Carryforwards
Amount of net operating loss carryforwards	31.2
Amount of state net operating loss carryforwards	22.8
Foreign
Operating Loss Carryforwards
Amount of net operating loss carryforwards	83.7
Amount of foreign net operating loss carryforwards	$ 0.5