INCOME TAXES - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Valuation Allowance [Line Items]
Tax expense (benefit) from discontinued operations	$ 500,000	$ (600,000)	$ 23,000,000.0
Deferred tax assets, valuation allowance	15,200,000	16,800,000
Undistributed earnings of its foreign subsidiaries	3,700,000
Uncertain tax positions	0
Unrecognized tax benefits, accrued interest and penalties	0	$ 0	$ 0
State
Valuation Allowance [Line Items]
Operating loss carryforwards utilized in period	4,100,000
Net operating loss carryforwards, valuation allowance	5,800,000
Foreign
Valuation Allowance [Line Items]
Net operating loss	7,900,000
Tax credit carryforward, amount	1,100,000
Net operating loss carryforwards, valuation allowance	7,900,000
Deductible from foreign temporary tax differences	400,000
Tax credit carryforward, valuation allowance	$ 1,100,000