XML 49 R37.htm IDEA: XBRL DOCUMENT v3.21.2

Stockholders' Equity - Summary of Activity for Unvested RSUs and PSUs (Parenthetical) (Detail) shares in Thousands	3 Months Ended
	Jul. 31, 2021 shares
Market Condition PSUs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
PSU Vested	43,200

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Definition

Number of options vested.

+ References

No definition available.

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_AwardTypeAxis=swbi_MarketConditionPsusMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: