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Equity - Additional Information (Detail) (USD $) | 6 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended | 0 Months Ended
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Mar. 11, 2014 Stock Incentive Plan 2011 | Jan. 08, 2014 Stock Incentive Plan 2011 | Dec. 31, 2013 Stock Incentive Plan 2011 Group 2 | Mar. 11, 2014 Stock Incentive Plan 2011 Restricted Stock Units (RSUs) | Jan. 08, 2014 Stock Incentive Plan 2011 Restricted Stock Units (RSUs) | Jan. 31, 2013 Stock Incentive Plan 2011 Restricted Stock Units (RSUs) | Jan. 08, 2014 Stock Incentive Plan 2011 Stock Options
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |
Shares issued, exercise of stock options | 215,000 | 319,750 |  |  |  |  |  |  |
Gross proceeds from exercise of stock options | $ 300,000 | $ 500,000 |  |  |  |  |  |  |
Net proceeds from exercise of stock options | 284,000 | 541,000 |  |  |  |  |  |  |
Shares issued, exercise of warrants |  | 70,000 |  |  |  |  |  |  |
Gross proceeds from exercise of warrants |  | 100,000 |  |  |  |  |  |  |
Net proceeds from exercise of warrants |  | $ 70,000 |  |  |  |  |  |  |
Stock units, Granted |  |  |  |  |  | 173,348 | 2,082,000 | 454,875 |
Stock options, Granted |  |  | 205,890 | 2,605,500 |  |  |  |  |
Stock options, Vesting Period |  |  |  |  |  |  | 3 years |  | 4 years
Restricted stock units, issued as a result of vesting |  |  |  |  | 0 |  |  |  |

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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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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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