Subsequent events (Narrative) (Details) (Subsequent Event [Member], Alltech Capital Limited [Member], USD $)	0 Months Ended
Feb. 13, 2014
Subsequent Event [Member] \| Alltech Capital Limited [Member]
Subsequent Event [Line Items]
Common Stock, Shares Subscribed but Unissued	1,360,000
Shares Issued, Price Per Share	$ 0.074
Warrant Validity	2 years
Warrant Strike Price	$ 0.15

Amount of common stock allocated to investors to buy shares of a new issue of common stock before they are offered to the public. When stock is sold on a subscription basis, the issuer does not initially receive the total proceeds. In general, the issuer does not issue the shares to the investor until it receives the entire proceeds.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

Name:	us-gaap_CommonStockSharesSubscribedButUnissued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant