Derivative liability - warrants (restated) (Details Textual) (USD $)	1 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended
Oct. 29, 2012	Oct. 31, 2012	Dec. 31, 2012	Dec. 31, 2012 Blpm [Member]	Dec. 31, 2012 Blpm [Member]	Jun. 01, 2012 Blpm [Member]
Fair Value Assumptions, Risk Free Interest Rate	0.76%			0.31%	0.34%
Fair Value Assumptions, Expected Term		5 years	4 years	4 years	4 years
Fair Value Assumptions, Expected Volatility Rate	75.00%			75.00%	75.00%
Fair Value Assumptions, Exercise Price	$ 3.85		$ 3.85	$ 4.00	$ 4.00	$ 4.00
Share Price			$ 3.86

Agreed upon price for the exchange of the underlying asset.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueAssumptionsExercisePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

Name:	us-gaap_FairValueAssumptionsExpectedTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

+ References

+ Details

Name:	us-gaap_FairValueAssumptionsExpectedVolatilityRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Risk-free interest rate assumption used in valuing an instrument.

+ References

+ Details

Name:	us-gaap_FairValueAssumptionsRiskFreeInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant