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CONSOLIDATED SUPPLEMENTARY FINANCIAL DATA (Unaudited) | 12 Months Ended
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Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract] |
CONSOLIDATED SUPPLEMENTARY FINANCIAL DATA (Unaudited) | Supplementary Financial Data RAMBUS INC. CONSOLIDATED SUPPLEMENTARY FINANCIAL DATA Quarterly Statements of Operations (Unaudited)
| Dec. 31, 2016 |  | Sept. 30, 2016 |  | June 30, 2016 |  | March 31, 2016 |  | Dec. 31, 2015 |  | Sept. 30, 2015 |  | June 30, 2015 |  | March 31, 2015
| (In thousands, except for per share amounts)
Total revenue | $ | 97,559 |  |  | $ | 89,855 |  |  | $ | 76,501 |  |  | $ | 72,682 |  |  | $ | 76,773 |  |  | $ | 73,779 |  |  | $ | 72,812 |  |  | $ | 72,914 |
Total operating costs and expenses (1) | $ | 97,035 |  |  | $ | 78,039 |  |  | $ | 64,493 |  |  | $ | 63,388 |  |  | $ | 56,439 |  |  | $ | 56,139 |  |  | $ | 57,258 |  |  | $ | 55,022 |
Operating income | $ | 524 |  |  | $ | 11,816 |  |  | $ | 12,008 |  |  | $ | 9,294 |  |  | $ | 20,334 |  |  | $ | 17,640 |  |  | $ | 15,554 |  |  | $ | 17,892 |
Net income (loss) (2) | $ | (3,445 | ) |  | $ | 4,511 |  |  | $ | 3,876 |  |  | $ | 1,878 |  |  | $ | 12,992 |  |  | $ | 182,033 |  |  | $ | 6,861 |  |  | $ | 9,502 |
Net income (loss) per share — basic | $ | (0.03 | ) |  | $ | 0.04 |  |  | $ | 0.04 |  |  | $ | 0.02 |  |  | $ | 0.12 |  |  | $ | 1.56 |  |  | 0.06 |  |  | $ | 0.08 |
Net income (loss) per share — diluted | $ | (0.03 | ) |  | $ | 0.04 |  |  | $ | 0.03 |  |  | $ | 0.02 |  |  | $ | 0.11 |  |  | $ | 1.52 |  |  | 0.06 |  |  | $ | 0.08 |
Shares used in per share calculations — basic (3) | 110,788 |  |  | 110,214 |  |  | 109,904 |  |  | 109,733 |  |  | 111,476 |  |  | 116,444 |  |  | 116,027 |  |  | 115,336 |
Shares used in per share calculations — diluted (3) | 110,788 |  |  | 113,723 |  |  | 112,061 |  |  | 112,252 |  |  | 113,388 |  |  | 119,542 |  |  | 120,939 |  |  | 117,442 |
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(1) | The quarterly financial information includes $18.3 million of impairment of in-process research and development intangible asset and a reduction of operating expenses due to the change in the contingent consideration liability of $6.8 million in the quarter ended December 31, 2016. Refer to Note 5, “Intangible Assets and Goodwill” of Notes to Consolidated Financial Statements of this Form 10-K. The quarterly financial information also includes restructuring charges of $3.6 million in the quarter ended December 31, 2015. Refer to Note 15, "Restructuring Charges" of Notes to Consolidated Financial Statements of this Form 10-K.
(2) | The quarterly financial information includes the following amount related to benefit from income taxes related to the deferred tax asset valuation allowance reversal as follows: $174.5 million in the quarter ended September 30, 2015. Refer to Note 16, "Income Taxes" of Notes to Consolidated Financial Statements of this Form 10-K.
(3) | The quarterly financial information includes the impact of the accelerated share repurchase program as follows: 0.7 million shares in the quarter ended June 30, 2016 and 7.8 million shares repurchased in the quarter ended December 31, 2015. Refer to Note 13, "Stockholders' Equity" of Notes to Consolidated Financial Statements of this Form 10-K.

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