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Commitments and contingencies (Details)	Jun. 30, 2016 USD ($)
Other Commitments [Line Items]
2016	$ 186,722
2017	809,131
2018-2020	770,543
Loan Commitment Fees [Member]
Other Commitments [Line Items]
2016	151,402
2017	0
2018-2020	0
Office Space [Member]
Other Commitments [Line Items]
2016	35,320
2017	809,131
2018-2020	$ 770,543

X

- Definition

Amount of contractual obligation maturing after the second fiscal year following the latest fiscal year.

+ References

No definition available.

+ Details

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Namespace Prefix:	asc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of contractual obligation due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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

X

- Definition

Amount of contractual obligation due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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

X

- 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

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

X

- Details

Name:	us-gaap_OtherCommitmentsAxis=asc_LoanCommitmentFeesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_OtherCommitmentsAxis=asc_OfficeSpaceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: