COMMITMENTS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
2018	$ 1,875,000
2019	1,057,000
2020	699,000
2021	286,000
2022	148,000
Thereafter	247,000
Total minimum lease payments	4,312,000
Rent expense, net	2,000,000	$ 1,900,000	$ 2,000,000
Non-cancelable purchase obligations	$ 0