Note 2 - Investments (Details Textual) - Subsequent Event [Member] - Sprint [Member]	Apr. 01, 2020 shares
Investment Owned, Balance, Shares (in shares)	40,000
Investment Owned, Balance, Shares (in shares)	4,102

Represents number of shares received by investee during period merger for equity securities.

No definition available.

Name:	bwla_EquitySecuritiesNumberOfSharesReceivedByInvesteeDuringMerger
Namespace Prefix:	bwla_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration