n/a

No definition available.

Name:	cann_StockHoldersEquityDetailsScheduleOfShareBasedCompensationAssumptionsLineItems
Namespace Prefix:	cann_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award.

+ References

No definition available.

+ Details

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

- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

+ Details

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

- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

+ Details

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

- Definition

The maximum risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

No definition available.

+ Details

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

- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.D.2)
-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=cann_EightPointFivePercentWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=cann_Warrants15PercentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=cann_PreTriggerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=cann_PostTriggerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

STOCKHOLDERS' EQUITY - Schedule of Stock-Based Compensation Assumptions (Details) - $ / shares	Dec. 11, 2019	Nov. 01, 2019	Oct. 18, 2019	Aug. 06, 2019	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
STOCKHOLDERS' EQUITY (Details) Schedule Of Share-based Compensation Assumptions [Line Items]
Current stock price				$ 0.83
Exercise price				$ 0.83
Risk-free interest rate				1.73%
Expected volatility				123.00%
8.5% Warrants [Member]
STOCKHOLDERS' EQUITY (Details) Schedule Of Share-based Compensation Assumptions [Line Items]
Interest rate (as a percent)					8.50%
15% Warrants
STOCKHOLDERS' EQUITY (Details) Schedule Of Share-based Compensation Assumptions [Line Items]
Interest rate (as a percent)					15.00%	15.00%	15.00%	15.00%
Pre-Trigger [Member] \| 8.5% Warrants [Member]
STOCKHOLDERS' EQUITY (Details) Schedule Of Share-based Compensation Assumptions [Line Items]
Current stock price	$ 0.67	$ 0.70	$ 0.95
Exercise price	$ 0.68	$ 1.00	$ 2.35
Risk-free interest rate	1.61%
Risk-free interest rate		1.55%	2.21%
Expected term (in years)	4 months 9 days	5 months 19 days	10 months 20 days
Expected volatility	113.00%	114.00%	123.00%
Pre-Trigger [Member] \| 15% Warrants
STOCKHOLDERS' EQUITY (Details) Schedule Of Share-based Compensation Assumptions [Line Items]
Current stock price	$ 0.67	$ 0.70	$ 0.55
Exercise price	$ 0.68	$ 1.00	$ 0.45
Risk-free interest rate	1.61%	1.55%
Expected term (in years)	4 years 5 months 19 days	4 years 6 months 29 days
Expected volatility	113.00%	114.00%
Pre-Trigger [Member] \| 15% Warrants \| Minimum
STOCKHOLDERS' EQUITY (Details) Schedule Of Share-based Compensation Assumptions [Line Items]
Risk-free interest rate			0.18%
Expected term (in years)			7 months 6 days
Expected volatility			88.00%
Pre-Trigger [Member] \| 15% Warrants \| Maximum
STOCKHOLDERS' EQUITY (Details) Schedule Of Share-based Compensation Assumptions [Line Items]
Risk-free interest rate			0.22%
Expected term (in years)			2 years 7 months 6 days
Expected volatility			116.00%
Post-Trigger [Member] \| 8.5% Warrants [Member]
STOCKHOLDERS' EQUITY (Details) Schedule Of Share-based Compensation Assumptions [Line Items]
Current stock price	$ 0.67	$ 0.70	$ 0.95
Exercise price	$ 0.45	$ 0.68	$ 1.00
Risk-free interest rate	1.61%
Risk-free interest rate		1.55%	2.21%
Expected term (in years)	4 months 9 days	5 months 19 days	10 months 20 days
Expected volatility	113.00%	114.00%	123.00%
Post-Trigger [Member] \| 15% Warrants
STOCKHOLDERS' EQUITY (Details) Schedule Of Share-based Compensation Assumptions [Line Items]
Current stock price	$ 0.67	$ 0.70	$ 0.55
Exercise price	$ 0.45	$ 0.68	$ 0.40
Risk-free interest rate	1.61%	1.55%
Expected term (in years)	4 years 5 months 19 days	4 years 6 months 29 days
Expected volatility	113.00%	114.00%
Post-Trigger [Member] \| 15% Warrants \| Minimum
STOCKHOLDERS' EQUITY (Details) Schedule Of Share-based Compensation Assumptions [Line Items]
Risk-free interest rate			0.18%
Expected term (in years)			7 months 6 days
Expected volatility			88.00%
Post-Trigger [Member] \| 15% Warrants \| Maximum
STOCKHOLDERS' EQUITY (Details) Schedule Of Share-based Compensation Assumptions [Line Items]
Risk-free interest rate			0.22%
Expected term (in years)			2 years 7 months 6 days
Expected volatility			116.00%