Note 5 - Employee Benefit Plans (Details Textual)	3 Months Ended
Sep. 27, 2020
Defined Contribution Plan Number of Plans	2

Number of defined contributions plans administered by the company.

No definition available.

Name:	bwla_DefinedContributionPlanNumberOfPlans
Namespace Prefix:	bwla_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration