Goodwill and Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense of intangible assets	$ 121	$ 278	$ 227	$ 556

Amortization of intangible assets including cost of sales.

No definition available.

Name:	slgd_AmortizationOfIntangibleAssetsIncludingCostOfSales
Namespace Prefix:	slgd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration