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Stock-Based Compensation - Additional Information (Detail) | 3 Months Ended |  |  | 3 Months Ended |  |
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Mar. 31, 2014 | Mar. 31, 2014 Incentive Stock Option Plan [Member] | May 31, 2013 Incentive Stock Option Plan [Member] | Mar. 31, 2014 Incentive Stock Option Plan [Member] Minimum [Member] | Mar. 31, 2014 Non Employee Directors Stock Option Plan [Member] | May 31, 2009 Non Employee Directors Stock Option Plan [Member] | Mar. 31, 2014 Non Employee Directors Stock Option Plan [Member] Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares to be issued under incentive stock option plan |  |  | 3,000,000 |  |  | 205,000 |
Shares for future grants |  | 145,860 |  |  | 5,000 |  |
Option exercisable rate |  | 25.00% |  |  | 25.00% |  |
Option exercisable period |  | 4 years |  |  | 1 year |  |
Options expire period |  | 15 years |  |  | 15 years |  |
Share based compensation options exercisable period |  | 2020 |  |  | 2017 |  |
Stock price percentage to fair value at grant date |  |  |  | 100.00% |  |  | 100.00%
Vesting period in years | 7 years | 4 years |  |  | 4 years |  |
Options vest and exercisable Description |  | The options vest and are exercisable beginning four years from the date of grant at the rate of 25% per year for four years. Options expire at the end of fifteen years from the date of grant. |  |  | The options vest and are exercisable beginning one year from the date of grant at the rate of 25% per year for four years. |  |
Stock option plan termination date |  | Dec. 31, 2014 |  |  |  |  |
Number of options granted for non-employee director | 10,000 |  |  |  |  |  |

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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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