Name:	buks_ContractObligationsForCapitalExpenditures
Namespace Prefix:	buks_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the expected increase (decrease) in the share percentage of total gaming revenue in the period.

No definition available.

Name:	buks_IncreaseDecreaseShareOfGamingRevenuePercentExpected
Namespace Prefix:	buks_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The term of the entity's management contract renewal term, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

No definition available.

Name:	buks_ManagementContractRenewalTerm
Namespace Prefix:	buks_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The annual expenditure for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

No definition available.

Name:	buks_PaymentsToAcquireProductiveAssetsAnnualExpenditure
Namespace Prefix:	buks_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

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Name:	us-gaap_StatementBusinessSegmentsAxis=buks_ProfessionalServicesMember
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Data Type:	na
Balance Type:
Period Type:

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
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