XML 61 R42.htm IDEA: XBRL DOCUMENT v3.22.4

Derivative Instruments (Details Narrative)	12 Months Ended
	Dec. 31, 2021 USD ($)
Kinross Calls [Member]
Proceeds from sale of covered calls	$ 8,000

X

- References

No definition available.

+ Details

Name:	sodi_ProceedsFromSaleOfCoveredCalls
Namespace Prefix:	sodi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=sodi_KinrossCallsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: