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(1) Summary of Significant Accounting Policies (Details Narrative) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Portfolio value $ 4,700,000   $ 7,100,000 $ 4,400,000
Stock-based compensation 1,500,000 $ 327,000 728,000 735,000
Unrecognized stock-based compensation costs 12,400,000   $ 12,400,000  
Weighted-average period for unrecognized costs     2 years 8 months 12 days  
Intrinsic value options outstanding 57,800,000   $ 57,800,000  
Intrinsic value of options exercisable $ 42,100,000   $ 42,100,000  
Options exercised     2,895,000  
Intrinsic value of options exercised     $ 12,200,000 $ 1,900,000
Shares available for grant 2,661,000   2,661,000  
Options Exercised [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]        
Options exercised     676,000