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Employee Stock Compensation Plans (Details Narrative) - USD ($)
 1 Months Ended 3 Months Ended 12 Months Ended
Jun. 20, 2023
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Jun. 18, 2013
Unrecognized stock option compensation cost related to non-vested options   $ 327,000      
Stock-based compensation expense   $ 59,000 $ 67,000    
Unrecognized stock option compensation cost related to non-vested options, period of recognition   17 months      
2023 Plan          
Common stock, capital shares reserved for future issuance 5,000,000        
Options, vested and exercisable   50,000      
Vested and exercisable shares to acquire shares of common stock   12,500      
Options, vested and exercisable exercise price   $ 0.51      
Aggregate intrinsic value   $ 4,500      
Average remaining contractual life of Solitario's outstanding options 10 years 4 years 10 months 24 days      
2013 Plan          
Common stock, capital shares reserved for future issuance         5,750,000
2013 Plan | Stock Option          
Stock option exercised in period, shares   3,728,500   3,778,500  
Proceeds from stock options exercised   $ 14,000      
Options, vested and exercisable   2,513,500   2,563,500  
Options, vested and exercisable price per share amount   $ 0.20   $ 0.60  
Options granted   50,000      
Aggregate intrinsic value   $ 491,000      
Average remaining contractual life of Solitario's outstanding options   2 years 7 months 2 days