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Stockholders' Equity (Details 2) (USD $)
12 Months Ended
Dec. 31, 2014
Series B (Member)  
Schedule of derivation of warrants granted value based on Black-Scholes pricing model [Abstract]  
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Grant Date Jan. 29, 2014
Stock price $ 13.75us-gaap_SharePrice
/ us-gaap_DerivativeByNatureAxis
= cann_SeriesBWarrantsMember
Risk-free interest rate 1.81%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_DerivativeByNatureAxis
= cann_SeriesBWarrantsMember
Expected dividend yield 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_DerivativeByNatureAxis
= cann_SeriesBWarrantsMember
Expected term (in years) 4 years 9 months 18 days
Expected volatility 171.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_DerivativeByNatureAxis
= cann_SeriesBWarrantsMember
Evans Warrants (Member)  
Schedule of derivation of warrants granted value based on Black-Scholes pricing model [Abstract]  
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Grant Date Oct. 21, 2014
Stock price $ 3.75us-gaap_SharePrice
/ us-gaap_DerivativeByNatureAxis
= cann_EvansWarrantsMember
Risk-free interest rate 0.56%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_DerivativeByNatureAxis
= cann_EvansWarrantsMember
Expected dividend yield 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_DerivativeByNatureAxis
= cann_EvansWarrantsMember
Expected term (in years) 2 years
Expected volatility 129.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_DerivativeByNatureAxis
= cann_EvansWarrantsMember
Spector (Member)  
Schedule of derivation of warrants granted value based on Black-Scholes pricing model [Abstract]  
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Grant Date Dec. 12, 2014
Stock price $ 1.11us-gaap_SharePrice
/ us-gaap_DerivativeByNatureAxis
= cann_SpectorWarrantsMember
Risk-free interest rate 0.56%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_DerivativeByNatureAxis
= cann_SpectorWarrantsMember
Expected dividend yield 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_DerivativeByNatureAxis
= cann_SpectorWarrantsMember
Expected term (in years) 2 years
Expected volatility 129.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_DerivativeByNatureAxis
= cann_SpectorWarrantsMember