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Stock-based compensation (Details Textual) (USD $)	0 Months Ended				3 Months Ended	0 Months Ended		3 Months Ended
	Jan. 09, 2014	Aug. 15, 2008	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Subsequent Event [Member]	Jan. 09, 2014 Director Two [Member]	Mar. 31, 2014 Director Two [Member]	Mar. 31, 2014 Director Two [Member] Subsequent Event [Member]
Share Based Compensation Arrangement By Share Based Payment Award Exercisable Date		Aug. 15, 2009
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date		Aug. 15, 2013
Class of Warrant or Right, Outstanding					30,000
Class of Warrant or Right, Exercise Price of Warrants or Rights					0.63
Common Stock Value To Be Issued			$ 12,500	$ 12,500			$ 12,500
Stock Issued During Period, Shares, New Issues	78,126				73,530	39,063		36,765
Stock Issued During Period Per Share Value Of New Issues	$ 0.16				$ 0.17
Stock Issued During Period, Value, New Issues	$ 12,500				$ 12,500
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted		25,000

X

- Definition

Aggregate par or stated value of common stock to be issued during the period.

+ References

No definition available.

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X

- Definition

Date on which non-qualified stock is exercisable.

+ References

No definition available.

+ Details

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X

- Definition

Per share value shares issued.

+ References

No definition available.

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X

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(i)(4))

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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- Definition

Number of warrants or rights outstanding.

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- Definition

Date the equity-based award expires, in CCYY-MM-DD format.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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Net number of non-option equity instruments granted to participants.

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- Definition

Number of new stock issued during the period.

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- Definition

Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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