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Employee Stock Compensation Plans (Details Narrative) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 20, 2023
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Jun. 18, 2013
Unrecognized stock option compensation cost related to non-vested options   $ 1,092,000   $ 1,092,000      
Stock-based compensation expense   $ 356,000 $ 59,000 $ 415,000 $ 126,000    
2023 Plan              
Option exercise price       $ 0.85      
Options granted       2,125,000      
Expected life years       5 years      
Expected volatility       71.50%      
Options vesting description       vest 25% on the date of grant and 25% on each anniversary date for the next three years      
Risk free interest rate       4.30%      
Grant date fair value       $ 1,120,000      
Common stock, capital shares reserved for future issuance 5,000,000            
Options, vested and exercisable   2,175,000   2,175,000   50,000  
Vested and exercisable shares to acquire shares of common stock   43,750   43,750   12,500  
Aggregate intrinsic value   $ 104,000   $ 104,000      
Average remaining contractual life of Solitario's outstanding options 10 years     4 years 10 months 24 days      
2023 Plan | Minimum              
Options, vested and exercisable exercise price   $ 0.51   $ 0.51      
2023 Plan | Maximum              
Options, vested and exercisable exercise price   $ 0.85   $ 0.85      
2013 Plan              
Common stock, capital shares reserved for future issuance             5,750,000
2013 Plan | Stock Option              
Options granted       50,000 50,000    
Stock option exercised in period, shares       3,728,500   3,778,500  
Proceeds from stock options exercised       $ 14,000 $ 14,000    
Options, vested and exercisable   2,548,500   2,548,500   2,563,500  
Options, vested and exercisable price per share amount   $ 0.20   $ 0.20   $ 0.69  
Intrinsic value   $ 12,000 $ 15,000 $ 12,000 $ 15,000    
Options exercise price   $ 0.28 $ 0.28 $ 0.28 $ 0.28    
Aggregate intrinsic value   $ 1,562,000   $ 1,562,000      
Average remaining contractual life of Solitario's outstanding options       2 years 4 months 2 days