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Stock-Based Compensation and Employee Benefit Plans - Summary of the Activity under the VI Chip Stock Option Plans (Detail) - Vi Chip Plan [Member] - USD ($) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Options Outstanding, Beginning balance |  | 10,715,000 |
Options Outstanding, Granted |  | 82,500 |
Options Outstanding, Forfeited and expired |  | (699,000) |
Options Outstanding, Exercised |  | (1,000) |
Options Outstanding, Ending balance | 10,715,000 | 10,097,500 |
Options Outstanding, Exercisable | 7,377,950 | 7,042,600 | 7,267,600
Options Outstanding, Vested or expected to vest |  | 9,821,129 |
Weighted Average Exercise Price, Beginning balance |  | $ 1.00 |
Weighted Average Exercise Price, Granted |  | 1.00 |
Weighted Average Exercise Price, Forfeited and expired |  | 1.00 |
Weighted Average Exercise Price, Exercised |  | 1.00 |
Weighted Average Exercise Price, Ending balance | $ 1.00 | 1.00 |
Weighted Average Exercise Price, Exercisable | $ 1.00 | 1.00 | $ 1.00
Weighted Average Exercise Price, Vested or expected to vest |  | $ 1.00 |
Weighted-Average Remaining Contractual Life in Years, Outstanding |  | 2 years 10 months 13 days |
Weighted-Average Remaining Contractual Life in Years, Exercisable |  | 1 year 9 months |
Weighted-Average Remaining Contractual Life in Years, Vested or expected to vest |  | 2 years 9 months 18 days |
Aggregate Intrinsic Value, Outstanding |  | $ 0 |
Aggregate Intrinsic Value, Exercisable |  | 0 |
Aggregate Intrinsic Value, Vested or expected to vest |  | $ 0 |

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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 (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + 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 (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + 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 (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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