Name:	BNSO_MaturitiesOfLeaseLiabilitiesTotal
Namespace Prefix:	BNSO_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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Future minimum rental payments in aggregate as of the balance sheet date under operating leases.

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121578510&loc=d3e41551-112718

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Future rental payments receivable within one year of the balance sheet date under an operating lease.

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Namespace Prefix:	us-gaap_
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Future rental payments receivable within the fourth year from the balance sheet date under an operating lease.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Future rental payments receivable within the third year from the balance sheet date under an operating lease.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Future rental payments receivable within the second year from the balance sheet date under an operating lease.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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The receivable or note face amount less the unamortized discount or premium.

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