CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical)	9 Months Ended
Sep. 30, 2021 USD ($)
CASH FLOWS FROM INVESTING ACTIVITIES
Note payable to seller	$ 4,000,000

The amount of convertible promissory notes issued in business combination.

No definition available.

Name:	snwv_BusinessCombinationIssuanceOfConvertiblePromissoryNotes
Namespace Prefix:	snwv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration