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Condensed Statements Of Cash Flows - USD ($)
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Operating activities    
  Net income (loss) $ (993,420) $ 341,933
  Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
      Stock-based compensation 295,833 223,446
      Depreciation and amortization 200,189 201,739
      Amortization of debt discount 8,273 8,273
      Deferred tax benefits 76,165
      Amortization of operating lease ROU asset 115,832 104,422
  Changes in operating assets and liabilities:    
      Accounts receivable 165,148 (870,177)
      Inventories (58,239) (59,049)
      Prepaid expenses and other current assets 60,836 (93,445)
      Other assets (222,249)
      Accounts payable and accrued expenses 515,883 36,134
      Accrued payroll and related expenses (144,040) (52,284)
      Net deferred revenue on shipments to distributors 45,793 (29,908)
      Deferred service revenue (367) 10,637
      Net change in operating lease liability (106,056) (128,050)
         Net cash (used in) provided by operating activities 105,665 (452,413)
Investing activities    
  Purchases of equipment and intangible assets (466,106) (134,919)
       Net cash used in investing activities (466,106) (134,919)
Financing activities    
  Common stocks repurchased and related expenses (208,425)
  Repayments of note payable (125,000) (125,000)
  Proceeds from stock options exercised 33,705 39,532
       Net cash used in financing activities (299,720) (85,468)
Net (decrease) increase in cash and cash equivalents (660,161) (672,800)
Cash and cash equivalents at beginning of period 3,623,469 6,095,886
Cash and cash equivalents at end of period 2,963,308 5,423,086
Supplemental disclosure of cash flow information    
Cash paid for interest 36,030 49,460
Non-cash investing and financing activities    
  Payroll tax liability for retired restricted stock $ 115,215