Name:	span_OperatingLeasesAnnualFutureMinimumPaymentsDueInFifthYears
Namespace Prefix:	span_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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 first and second years following the effective date of the lease.

No definition available.

Name:	span_OperatingLeasesAnnualFutureMinimumPaymentsDueInFirstAndTwoYears
Namespace Prefix:	span_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of required monthly payment under a operating lease arrangement.

No definition available.

Name:	span_OperatingLeasesMonthlyRentPayments
Namespace Prefix:	span_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Area of a real estate property.

No definition available.

Name:	us-gaap_AreaOfRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

No definition available.

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.