No definition available.

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

- Definition

Number of wholly owned subsidiary.

+ References

No definition available.

+ Details

Name:	cann_NumberOfWhollyOwnedSubsidiary
Namespace Prefix:	cann_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	cann_RevenueWithinOwnerShipGroupPercentage
Namespace Prefix:	cann_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Area of land held.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfLand
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ 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 210.5-02.1)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_Cash
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

+ 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 210.5-02.19,20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportingUnits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585

+ Details

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

- Details

Name:	us-gaap_BusinessAcquisitionAxis=cann_GCFinanceArizonaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cann_PuebloWestPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cann_TheGreenhouseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cann_ACSCorpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_OfficeBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=cann_ConsumerBankingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	cann_SaleOfPropertyAxis=cann_PuebloWestPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

NATURE OF OPERATIONS, HISTORY AND PRESENTATION (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2018 USD ($) a ft²	Sep. 30, 2018 USD ($) a ft²	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
NATURE OF OPERATIONS, HISTORY AND PRESENTATION (Details) [Line Items]
Number of Reporting Units		4
RevenueWithinOwnerShipGroupPercentage	42.73%	39.06%
Number Of Wholly Owned Subsidiary		6
Cash (in Dollars) \| $	$ 9,841,647	$ 9,841,647	$ 5,036,787	$ 252,538	$ 773,795
Debt, Current (in Dollars) \| $	6,896,000	6,896,000
GC Finance Arizona [Member]
NATURE OF OPERATIONS, HISTORY AND PRESENTATION (Details) [Line Items]
Debt Instrument, Face Amount (in Dollars) \| $	$ 825,000	$ 825,000
Pueblo West Property [Member]
NATURE OF OPERATIONS, HISTORY AND PRESENTATION (Details) [Line Items]
Area of Land (in Acres) \| a	3	3
Area of Real Estate Property (in Square Feet) \| ft²	5,000	5,000
The Greenhouse [Member]
NATURE OF OPERATIONS, HISTORY AND PRESENTATION (Details) [Line Items]
Area of Real Estate Property (in Square Feet) \| ft²	16,056	16,056
ACS Corp [Member]
NATURE OF OPERATIONS, HISTORY AND PRESENTATION (Details) [Line Items]
Number Of Wholly Owned Subsidiary		1
Office Building [Member] \| The Greenhouse [Member]
NATURE OF OPERATIONS, HISTORY AND PRESENTATION (Details) [Line Items]
Area of Real Estate Property (in Square Feet) \| ft²	10,000	10,000
Consumer Banking [Member] \| The Greenhouse [Member]
NATURE OF OPERATIONS, HISTORY AND PRESENTATION (Details) [Line Items]
Area of Real Estate Property (in Square Feet) \| ft²	5,000	5,000
Pueblo West Property [Member]
NATURE OF OPERATIONS, HISTORY AND PRESENTATION (Details) [Line Items]
Proceeds from Sale of Property, Plant, and Equipment (in Dollars) \| $		$ 625,000