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Represents the portion receivable in the fourth fiscal year, following the latest fiscal year, of the contractually required future rental payments receivable on noncancelable subleasing arrangements.

No definition available.

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Represents the portion receivable in the third fiscal year, following the latest fiscal year, of the contractually required future rental payments receivable on noncancelable subleasing arrangements.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Represents the portion receivable in the second fiscal year, following the latest fiscal year, of the contractually required future rental payments receivable on noncancelable subleasing arrangements.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Represents the portion receivable in the remainder of the fiscal year, following the latest fiscal year, of the contractually required future rental payments receivable on noncancelable subleasing arrangements.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Amount of required minimum rental payments, net of the related sublease revenue receivable, for leases having an initial or remaining non-cancelable letter-terms in excess of one year. A negative number indicates that the sublease revenue exceeds the rent payable.

No definition available.

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Amount of required minimum rental payments, net of the related sublease revenue, for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth 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. A negative number indicates that the sublease revenue exceeds the rent payable.

No definition available.

Name:	qbak_OperatingLeasesFutureMinimumPaymentsNetOfSubleaseRevenueDueInFiveYears
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Amount of required minimum rental payments, net of the related sublease revenue, for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth 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. A negative number indicates that the sublease revenue exceeds the rent payable.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Amount of required minimum rental payments, net of the related sublease revenue, for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third 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. A negative number indicates that the sublease revenue exceeds the rent payable.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Amount of required minimum rental payments, net of the related sublease revenue, for operating leases having an initial or remaining non-cancelable lease term in excess of one year 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. A negative number indicates that the sublease revenue exceeds the rent payable.

No definition available.

Name:	qbak_OperatingLeasesFutureMinimumPaymentsNetOfSubleaseRevenueDueInTwoYears
Namespace Prefix:	qbak_
Data Type:	xbrli:monetaryItemType
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Amount of required minimum rental payments, net of the related sublease revenue, for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the remainder of the 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. A negative number indicates that the sublease revenue exceeds the rent payable.

No definition available.

Name:	qbak_OperatingLeasesFutureMinimumPaymentsNetOfSubleaseRevenueRemainderOfFiscalYear
Namespace Prefix:	qbak_
Data Type:	xbrli:monetaryItemType
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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 10
-Section 55
-Paragraph 40
-Subparagraph (Note 3)
-URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717

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Contractually required future rental payments receivable on noncancelable subleasing arrangements.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth 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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 10
-Section 55
-Paragraph 40
-Subparagraph (Note 3)
-URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth 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.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third 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.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year 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.

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Data Type:	xbrli:monetaryItemType
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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the remainder of the 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.

No definition available.