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v3.3.1.900

Summary of Significant Accounting Policies - Weighted Average Number of Common Shares Outstanding (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss for basic earnings per share | $ (9,903) |  | $ (160,265) |  | $ (3,947) |  | $ (4,561) |  | $ (273) |  | $ (3,041) |  | $ (2,895) |  | $ (6,673) |  | $ (178,676) | $ (12,882) | $ (82,227)
Decrease in fair value of warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | (2,578) | 0
Diluted net loss attributable to common stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (178,676) | $ (15,460) | $ (82,227)
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100,385 | 98,138 | 97,111
Weighted average unvested common shares subject to repurchase |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (811) | (791) | (876)
Weighted average common shares outstanding—basic |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 99,574 | 97,347 | 96,235
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of preferred stock, shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Options, shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Warrants, shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 388 |
Weighted average common shares outstanding—diluted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 99,574 | 97,735 | 96,235
Net loss per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) | $ (0.10) | [1] | $ (1.61) | [1] | $ (0.04) | [1] | $ (0.05) | [1] | $ 0.00 | [1] | $ (0.03) | [1] | $ (0.03) | [1] | $ (0.07) | [1] | $ (1.79) | $ (0.13) | $ (0.85)
Diluted (in dollars per share) | $ (0.10) | [1] | $ (1.61) | [1] | $ (0.04) | [1] | $ (0.05) | [1] | $ (0.03) | [1] | $ (0.04) | [1] | $ (0.03) | [1] | $ (0.07) | [1] | $ (1.79) | $ (0.16) | $ (0.85)
[1] | Basic and diluted net loss per share is computed independently for each of the quarters presented. Therefore, the sum of the quarterly per share amounts will not necessarily equal the total for the year.

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- Definition This element represents the weighted average total number of shares issued throughout the period including the first (beginning balance outstanding) and last (ending balance outstanding) day of the period before considering any reductions (for instance, shares held in treasury) to arrive at the weighted average number of shares outstanding. Weighted average relates to the portion of time within a reporting period that common shares have been issued and outstanding to the total time in that period. Such concept is used in determining the weighted average number of shares outstanding for purposes of calculating earnings per share (basic). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e2646-109256 + Details
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