Derivative Warrant Liability (Details 2) (USD $)	12 Months Ended
Dec. 31, 2014
Change in Aggregate Loss on Derivative Liability
Beginning balance at beginning of period
Initial loss on recognition of derivative liability	868,908us-gaap_DerivativeLossOnDerivative
Change in estimated fair market value	2,524,996us-gaap_UnrealizedGainLossOnDerivatives
Balance at end of period	$ 3,393,904cann_AggregateLossOnDerivativeLiability

Amount of decrease in the fair value of derivatives recognized in the income statement.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (a),(c),(d),(e)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

Name:	us-gaap_DerivativeLossOnDerivative
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration