Stock Option Plans - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Milestone recognized total compensation cost	$ 107,205	$ 39,877	$ 334,049	$ 119,630
Total unrecognized compensation cost related to non-vested options	$ 881,765	$ 272,946	$ 881,765	$ 272,946
Milestone recognize cost over a weighted average period			3 years 7 months 2 days	2 years
Share based compensation arrangement by share based payment award compensation cost forfeiture rate	6.00%	6.00%	6.00%	6.00%
Option Activity for Non-Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Milestone recognized total compensation cost			$ 0	$ 0
Total unrecognized compensation cost related to non-vested options	$ 0		$ 0
Share based compensation arrangement by share based payment award compensation cost forfeiture rate	6.00%		6.00%

Share based compensation arrangement by share based payment award compensation cost forfeiture rate.

No definition available.

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- Definition

Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ 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 (h)(1)(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ 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 (i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, 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 (i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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