Face amount of debt exchanged.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of deemed dividends.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The increase in accrued common stock shares payable during the period attributable to exercise of cashless warrants.

+ References

No definition available.

+ Details

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Namespace Prefix:	cann_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of shares issued in a cashless exercise of warrants.

+ References

No definition available.

+ Details

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Namespace Prefix:	cann_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of warrants issued.

+ References

No definition available.

+ Details

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

- Definition

Represents the information pertaining to proceeds of any new debt or equity capital raise with net proceeds of more than the specified limit , to be repaid in full.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Number of warrants exercised.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 65
-Paragraph 15
-Subparagraph (g)(2)
-URI http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333

Reference 2: 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(30)(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28541-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

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

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

+ Details

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

- Definition

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4332-108586

+ Details

Name:	us-gaap_DebtConversionConvertedInstrumentAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The number of warrants issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

+ Details

Name:	us-gaap_DebtConversionConvertedInstrumentWarrantsOrOptionsIssued1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- 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=119993939&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

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

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

+ Details

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

- Definition

The cash outflow for a borrowing supported by a written promise to pay an obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Per share decrease in exercise price of warrant. Excludes change due to standard antidilution provision.

+ References

+ Details

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

- Details

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- Details

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- Details

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- Details

Name:	us-gaap_DebtInstrumentAxis=cann_TwelvePercentNotes2019Member
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Data Type:	na
Balance Type:
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- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=cann_Warrant2020Member
Namespace Prefix:
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Period Type:

- Details

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- Details

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- Details

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NOTES PAYABLE - 15% Notes (Details)	1 Months Ended	2 Months Ended	3 Months Ended				6 Months Ended		12 Months Ended
NOTES PAYABLE - 15% Notes (Details)	Dec. 31, 2020 USD ($)	Mar. 31, 2020 USD ($) EquityInstruments $ / shares shares	Jun. 30, 2021 USD ($) shares	Mar. 31, 2021 USD ($)	Jun. 30, 2020 USD ($) $ / shares	Mar. 31, 2020 USD ($) $ / shares shares	Jun. 30, 2021 USD ($) shares	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($)	Feb. 08, 2021	Dec. 23, 2020	Sep. 30, 2019
NOTES PAYABLE
Repayment of notes							$ 200,000	$ 975,000
Exercise price of warrants \| $ / shares		$ 1.00				$ 1.00
Number of shares issued by each warrant \| shares		1				1
Debt principal amount converted								957,056
Additional paid-in capital	$ 75,891,414		$ 80,140,373				80,140,373		$ 75,891,414
Deemed dividend					$ 98,000			98,000
Warrant cashless exercises, Shares \| shares									259,415
15% Notes
NOTES PAYABLE
Aggregate principal amount		$ 2,031,000				$ 2,031,000				$ 300,000
Interest rate (as a percent)	15.00%	15.00%				15.00%			15.00%	15.00%			12.00%
Face amount of debt exchanged										$ 1.0
Repayment of notes	$ 2,100,000			$ 200,000
Proceeds from debt		$ 525,000				$ 525,000				$ 300,000
Repayment limit for full payment		$ 5,000,000
Number of warrants issued \| EquityInstruments		3
Warrant exercise price, decrease (in dollars per share) \| $ / shares					$ 0.3983
Debt principal amount converted									$ 250,000
Number of warrants issued upon conversion \| shares		6,993,000
Amortization of debt discount			$ 0		$ 72,516		$ 0	138,837
15% Notes \| Extinguishment of debt
NOTES PAYABLE
Additional paid-in capital	668,335								668,335
10% Notes
NOTES PAYABLE
Aggregate principal amount	$ 2,940,000								$ 2,940,000
Interest rate (as a percent)	10.00%		10.00%				10.00%		10.00%	10.00%	10.00%	10.00%
Amortization of debt discount			$ 21,630		$ 0		$ 43,023	$ 0
12% Notes
NOTES PAYABLE
Aggregate principal amount		$ 1,506,000				$ 1,506,000
Interest rate (as a percent)													12.00%
Warrant A 2020
NOTES PAYABLE
Number of warrants issued upon conversion \| shares									250,000
Warrants exercised \| shares			1,131,000				1,131,000
Shares issued in cashless exercise of warrants \| shares							282,813
Warrant B 2020
NOTES PAYABLE
Number of warrants issued upon conversion \| shares									250,000
Warrant C 2020
NOTES PAYABLE
Number of warrants issued upon conversion \| shares									250,000
15% Warrants
NOTES PAYABLE
Interest rate (as a percent)		15.00%	15.00%		15.00%	15.00%	15.00%	15.00%		15.00%
Exercise price of warrants \| $ / shares		$ 0.45				$ 0.45
15% Warrants \| Debt discount
NOTES PAYABLE
Additional paid-in capital	$ 333,056								$ 333,056