INCOME TAXES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Income tax expense (benefit)	$ (1,446)	$ (2,115)	$ 8,913
Deferred income tax (benefit) expense	(1,805)	(2,255)	8,864
Current income tax expense (benefit)	359	140	49
Cash paid for income taxes	128	36	$ 213
Income tax expense decrease resulting from the recognition of tax benefits related to stock-based compensation deductions		1,900
Tax Years 2018 Through 2022
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	41,000
Tax Years 2024 Through 2025
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	5,500
Tax Year 2027 and later
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	500
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Deferred income tax (benefit) expense		1,900
Operating loss carryforwards	47,000
Domestic Tax Authority | Research Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	1,000
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Deferred income tax (benefit) expense		$ 100
Operating loss carryforwards	$ 64