Name:	teu_ExpectedAmortizationOfBelowMarketAcquiredTimeChartersNextRollingTwelveMonths
Namespace Prefix:	teu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of accretion expected to be recognized in the third rolling twelve months following the latest balance sheet presented for liabilities, excluding financial liabilities, lacking physical substance with a finite life.

No definition available.

Name:	teu_ExpectedAmortizationOfBelowMarketAcquiredTimeChartersRollingYearThree
Namespace Prefix:	teu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of accretion expected to be recognized in the second rolling twelve months following the latest balance sheet presented for liabilities, excluding financial liabilities, lacking physical substance with a finite life.

No definition available.

Name:	teu_ExpectedAmortizationOfBelowMarketAcquiredTimeChartersRollingYearTwo
Namespace Prefix:	teu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The net carrying amount as of the balance sheet date of the asset arising from the market value of the time charter assumed from a vessel acquisition.

No definition available.

Name:	teu_FairValueAboveMarketAcquiredTimeCharter
Namespace Prefix:	teu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The net carrying amount as of the balance sheet date of the liability arising from the market value of the time charter assumed from a vessel acquisition.

No definition available.

Name:	teu_FairValueOfBelowMarketAcquiredTimeCharter
Namespace Prefix:	teu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of amortization expense expected to be recognized in the next rolling twelve months following the latest balance sheet presented for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

No definition available.

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

Amount of amortization expense expected to be recognized in the third rolling twelve months following the latest balance sheet presented for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

No definition available.

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

Amount of amortization expense expected to be recognized in the second rolling twelve months following the latest balance sheet presented for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

No definition available.