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Accumulated Other Comprehensive Income (Tables) | 12 Months Ended
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Dec. 31, 2014
Accumulated Other Comprehensive Income [Abstract] |
Reconciliation Of Amounts Contained In Accumulated Other Comprehensive Income |
|  | Accumulated other comprehensive income/(loss) |  | Accumulated other comprehensive income, net of tax
As of December 31, 2012 | $ | 2 | $ | 2
Other comprehensive gain/(loss) due to change in fair market value of marketable securities during period before reclassifications |  | 268 |  | 228
Reclassifications due to realization of gain/(loss) on sale of marketable securities (1) |  | (54) |  | (46)
Reclassifications due to write-down of marketable securities (2) |  | (275) |  | (234)
As of December 31, 2013 |  | (59) |  | (50)
Other comprehensive gain/(loss) due to change in fair market value of marketable securities during period before reclassifications |  | 21 |  | 18
Reclassifications due to realization of gain/(loss) on sale of marketable securities (1) |  | (24) |  | (20)
Reclassifications due to write-down of marketable securities (2) |  | 73 |  | 62
As of December 31, 2014 | $ | 11 | $ | 10
Schedule of Share Based Payments Valuation Assumptions |
|  |  |  |  | Years ended December 31,
|  |  | 2014 |  | 2013 |  | 2012
Expected volatility |  |  | 69.17% |  | 72.26% |  | 81.69% | - | 83.67%
Risk-free interest rate |  |  | 1.75% |  | 1.70% |  | 0.77% | - | 0.88%
Expected life (years) |  |  | 5 |  | 5 |  | 5
Dividend yield |  |  | N/A |  | N/A |  | N/A
Forfeiture rate |  |  | 10% |  | 15% |  | 15%

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669686-108580 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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