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Company and Summary of Significant Accounting Policies - Accounts Receivable and Concentration of Credit Risk (Details)
3 Months Ended 12 Months Ended
Mar. 31, 2024
USD ($)
Mar. 31, 2023
USD ($)
Dec. 31, 2023
USD ($)
Concentration Risk [Line Items]      
Accounts receivable, before allowance for credit loss $ 4,700,000   $ 4,900,000
Unbilled receivables $ 76,070   83,697
Accounts receivable, less than 90 days from due, percentage 0.011    
Allowance for doubtful accounts receivable $ 205,000 $ 155,000  
Bad Debt Expense     50,000
Accounts receivable, net $ 4,798,692   $ 5,012,373
Accounts Receivable | Customer Concentration Risk | Customer One      
Concentration Risk [Line Items]      
Concentration risk, percentage 10.00%   10.00%
Revenue Benchmark | Customer Concentration Risk | Customer One      
Concentration Risk [Line Items]      
Concentration risk, percentage   10.00%  
Revenue Benchmark | Customer Concentration Risk | Customer Two      
Concentration Risk [Line Items]      
Concentration risk, percentage 10.00%