Common stock warrants outstanding (Detail) - Jun. 30, 2015 - $ / shares	Total
Warrant One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants Outstanding	500,000
Remaining Contractual Life (years)	6 years 8 months 1 day
Weighted Average Exercise	$ 1.14
Warrant Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants Outstanding	108,697
Remaining Contractual Life (years)	4 years 9 months 7 days
Weighted Average Exercise	$ 0.46
Warrant Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants Outstanding	57,611
Remaining Contractual Life (years)	4 years 9 months 7 days
Weighted Average Exercise	$ 0.58
Warrant Four [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants Outstanding	26,989
Remaining Contractual Life (years)	4 years 7 months 28 days
Weighted Average Exercise	$ 2.00
Warrant Five [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants Outstanding	247,500
Remaining Contractual Life (years)	4 years 4 months 2 days
Weighted Average Exercise	$ 2.00
Warrant Six [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants Outstanding	238,412
Remaining Contractual Life (years)	3 years 7 months 2 days
Weighted Average Exercise	$ 3.04
Warrant Seven [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants Outstanding	30,000
Remaining Contractual Life (years)	2 years 4 months 2 days
Weighted Average Exercise	$ 2.66
Warrant Eight [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants Outstanding	586,238
Remaining Contractual Life (years)	1 year
Weighted Average Exercise	$ 2.66
Warrant Total [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants Outstanding	1,795,447
Remaining Contractual Life (years)	3 years 9 months 22 days
Weighted Average Exercise	$ 1.99

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

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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.

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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