7. Share-based payments (Details 3) - $ / shares	9 Months Ended	12 Months Ended
Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2013
Number of Warrants
Granted		7,204,573	645,424
Nonemployee Common stock warrants - Service and performance conditions [Member]
Number of Warrants
Nonvested, Beginning	2,880,000
Granted		3,000,000
Vested	(580,000)	(120,000)
Nonvested, Ending	2,300,000	2,880,000
Weighted-average Grant Date Fair Value
Nonvested, Beginning	$ 0.98
Granted		$ 0.98
Vested	0.99	0.99
Nonvested, Ending	$ 0.99	$ 0.98

Gross number of share options (or share units) granted during the period.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ 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 (d)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

Number of non-vested options outstanding.

+ References

No definition available.

+ Details

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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- Definition

Weighted average grant-date fair value of non-vested options outstanding.

+ References

No definition available.

+ Details

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- References

No definition available.

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- Definition

Number of options vested.

+ References

No definition available.

+ Details

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- Definition

Weighted average grant-date fair value of options vested.

+ References

No definition available.

+ Details

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