Note 3 - Notes and Other Receivables - Schedule of Notes Receivables (Details) (Parentheticals) - USD ($)	9 Months Ended	12 Months Ended
Jun. 30, 2018	Sep. 30, 2017
Notes and other receivables, allowance	$ 977,770	$ 977,770
Wellness Group Pharms LLC [Member]
Secured note	$ 673,294	$ 673,294
Interest rate	18.00%	18.00%
Accrued consulting fees	$ 206,024	$ 206,024
Construction advances	332,357	332,357
Accrued interest	550,000	550,000
Notes and other receivables, allowance	$ 977,770	$ 977,770
Coastal Compassion Inc. [Member]
Interest rate	18.00%	18.00%
Construction advances	$ 129,635	$ 129,635
Accrued interest	42,940	42,940
Maximum financing amount	$ 2,500,000	$ 2,500,000

The construction advance payment received from the counterparty.

No definition available.

Name:	acan_ConstructionAdvancePaymentReceived
Namespace Prefix:	acan_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The monthly fee charged to counterparty by the company.

+ References

No definition available.

+ Details

Name:	acan_ConsultingServicesRevenueMonthly
Namespace Prefix:	acan_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The interest rate charged on financing to counterparty under agreement.

+ References

No definition available.

+ Details

Name:	acan_NoteReceivableInterestRate
Namespace Prefix:	acan_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of advances that are provided as working capital advances under the agreement.

+ References

No definition available.

+ Details

Name:	acan_WorkingCapitalAdvances
Namespace Prefix:	acan_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The receivable amount of advances made to counterparty as working capital.

+ References

No definition available.

+ Details

Name:	acan_WorkingCapitalAdvancesReceivable
Namespace Prefix:	acan_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

A valuation allowance relating to a written agreement to receive money (at a specified future date(s) more than one year from the reporting date, consisting of principal as well as any accrued interest) for the portion that is expected to be uncollectible.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524

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 210.5-02.4)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Carrying amount as of the balance sheet date of noncurrent interest earned but not received. Also called accrued interest or accrued interest receivable.

+ 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(17))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Details

Name:	srt_CounterpartyNameAxis=acan_WellnessGroupPharmsLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=acan_CoastalCompassionIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: