CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 316	$ 462
Short-term investments, at fair value	3,951	5,087
Investments in marketable equity securities, at fair value	949	1,307
Prepaid expenses and other	38	303
Total current assets	5,254	7,159
Mineral properties	16,646	16,306
Other assets	134	154
Total assets	22,034	23,619
Current liabilities:
Accounts payable	228	239
Operating lease liability	35	37
Total current liabilities	263	276
Long-term liabilities
Asset retirement obligation - Lik	125	125
Operating lease liability	0	35
Total long-term liabilities	125	160
Shareholders' equity:
Preferred stock, $0.01 par value, authorized 10,000,000 shares (none issued and outstanding at December 31, 2022 and 2021)	0	0
Common stock, $0.01 par value, authorized, 100,000,000 shares (64,801,373 and 62,036,399, respectively, shares issued and outstanding at December 31, 2022 and 2021)	648	620
Additional paid-in capital	74,886	72,523
Accumulated deficit	(53,888)	(49,960)
Total shareholders' equity	21,646	23,183
Total liabilities and shareholders' equity	$ 22,034	$ 23,619

No definition available.

Name:	sodi_InvestmentsInMarketableEquitySecuritiesAtFairValue
Namespace Prefix:	sodi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).