XML 59 R47.htm IDEA: XBRL DOCUMENT v3.21.2

Share-Based Payments - Summary of Stock Warrant Activity (Detail)	9 Months Ended
	Oct. 09, 2021 shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock warrant, outstanding and nonvested	4,349,817
Vested	326,238
Stock warrant, outstanding and nonvested	4,023,579

X

- Definition

Class of warrants or rights number of securities vested.

+ References

No definition available.

+ Details

Name:	sptn_ClassOfWarrantsOrRightsNumberOfSecuritiesVested
Namespace Prefix:	sptn_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration