XML 87 R73.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Revenue Recognition - Schedule of Sales Return Liability (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 29, 2018 | Dec. 30, 2017
Sales Return Liability [Roll Forward] |  |
Balance at beginning of year | $ 19,270 | $ 15,222
Additions that reduce net sales | 79,326 | 77,226
Deduction from reserves | (78,689) | (73,178)
Balance at end of period | $ 19,907 | $ 19,270

X
- Definition Contract with customer refund liability additions. + References No definition available. + Details
Name: | snbr_ContractWithCustomerRefundLiabilityAdditions
Namespace Prefix: | snbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Contract with customer refund liability deductions. + References No definition available. + Details
Name: | snbr_ContractWithCustomerRefundLiabilityDeductions
Namespace Prefix: | snbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | snbr_SalesReturnLiabilityRollForward
Namespace Prefix: | snbr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of liability for consideration received or receivable from customer which is not included in transaction price, when consideration is expected to be refunded to customer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 55 -Paragraph 27 -URI http://asc.fasb.org/extlink&oid=108792157&loc=SL49130611-203046-203046 + Details
Name: | us-gaap_ContractWithCustomerRefundLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant