Common stock warrants outstanding (Detail) (USD $)	12 Months Ended
Dec. 31, 2014
Warrant One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants Outstanding	247,500
Remaining Contractual Life (years)	4 years 10 months 2 days
Weighted Average Exercise	$ 2.00
Warrant Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants Outstanding	30,000
Remaining Contractual Life (years)	2 years 10 months 2 days
Weighted Average Exercise	$ 2.66
Warrant Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants Outstanding	238,412
Remaining Contractual Life (years)	4 years 29 days
Weighted Average Exercise	$ 2.27
Warrant Total [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants Outstanding	515,912
Remaining Contractual Life (years)	4 years 4 months 13 days
Weighted Average Exercise	$ 2.16

Share based compensation arrangement by share based payment award equity instruments other than options nonvested weighted average exercise price

No definition available.

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- Definition

Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

+ 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)(i)

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-Publisher FASB

-Name Accounting Standards Codification

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