SIGNIFICANT CUSTOMER INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Revenue, Major Customer [Line Items]
Sales, net	$ 315,456	$ 140,743
Product [Member]
Revenue, Major Customer [Line Items]
Sales, net	289,361	112,112
Sales Revenue, Net [Member] \| Customer Concentration Risk [Member] \| Applied Materials, Inc. [Member]
Revenue, Major Customer [Line Items]
Sales, net	$ 50,981	$ 36,290
Concentration Risk, Percentage	16.20%	25.80%
Sales Revenue, Net [Member] \| Customer Concentration Risk [Member] \| Lam Research [Member]
Revenue, Major Customer [Line Items]
Sales, net	$ 32,996	$ 19,667
Concentration Risk, Percentage	10.50%	14.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Applied Materials, Inc. [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	15.20%		14.90%
Accounts receivable	$ 32,627		$ 36,849

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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