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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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Data Type:	xbrli:monetaryItemType
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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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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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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 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.

Name:	qbak_OperatingLeasesFutureMinimumPaymentsNetOfSubleaseRevenueDueInThreeYears
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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 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=6584154&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=6453985&loc=d3e41502-112717

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Contractually required future rental payments receivable on noncancelable subleasing arrangements.

Name:	us-gaap_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals
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=6453985&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=6584154&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.