SIGNIFICANT CUSTOMERS AND GEOGRAPHIC NET REVENUES Customer and Credit Risk Concentration (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019 USD ($) Customer	Sep. 30, 2018 USD ($) Customer	Sep. 30, 2019 USD ($) Customer	Sep. 30, 2018 USD ($) Customer	Dec. 31, 2018 Customer
Concentration Risk [Line Items]
NET REVENUES | $	$ 114,159	$ 110,085	$ 306,212	$ 322,648
Distributors [Member]
Concentration Risk [Line Items]
NET REVENUES | $	$ 78,000	$ 222,700	$ 83,300	$ 245,400
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Number of major customers	1	1	1	1
Concentration risk percentage benchmark	10.00%	10.00%	10.00%	10.00%
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member] | Avnet
Concentration Risk [Line Items]
Concentration risk, percentage of total net revenues	11.00%	14.00%	11.00%	14.00%
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member] | Ten Customers
Concentration Risk [Line Items]
Number of major customers	10	10	10	10
Concentration risk, percentage of total net revenues	55.00%	56.00%	54.00%	57.00%
Accounts Receivable [Member] | Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Number of major customers	10		10		10
Concentration risk percentage benchmark for accounts receivable (more than)	10.00%		10.00%		10.00%
Accounts Receivable [Member] | Credit Concentration Risk [Member] | Avnet
Concentration Risk [Line Items]
Concentration risk percentage benchmark			14.00%		17.00%
Accounts Receivable [Member] | Credit Concentration Risk [Member] | Powertech Distribution Ltd.
Concentration Risk [Line Items]
Concentration risk percentage benchmark					11.00%
Accounts Receivable [Member] | Credit Concentration Risk [Member] | Ten Customers
Concentration Risk [Line Items]
Concentration risk percentage benchmark			65.00%		64.00%