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SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS Prior Period Balance Sheet Adjustments, Adoption of ASU 2014-09 (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Accounts receivable, net | $ 16,798 | $ 6,528
Prepaid expenses and other current assets | 7,758 | 8,715
DEFERRED TAX ASSETS | 2,364 | 11,342
Deferred income on sales to distributors |  | 0
Other accrued liabilities | 4,009 | 2,734
Retained earnings | $ 351,408 | 332,891
As Reported |  |
Accounts receivable, net |  | 6,961
Prepaid expenses and other current assets |  | 8,520
DEFERRED TAX ASSETS |  | 12,032
Deferred income on sales to distributors |  | 16,207
Other accrued liabilities |  | 2,434
Retained earnings |  | 317,912
Adjustments for Accounting Standards Update 2014-09 [Member] |  |
Accounts receivable, net |  | (433)
Prepaid expenses and other current assets |  | 195
DEFERRED TAX ASSETS |  | (690)
Deferred income on sales to distributors |  | (16,207)
Other accrued liabilities |  | 300
Retained earnings |  | $ 14,979

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