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Condensed Statements of Cash Flows - USD ($)
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Operating activities    
  Net income $ 341,933 $ 202,902
  Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
      Stock-based compensation 223,446 148,772
      Depreciation and amortization 201,739 164,017
      Amortization of debt discount 8,273 8,273
      Deferred tax benefits 76,165
  Changes in operating assets and liabilities:    
      Accounts receivable (870,177) (294,799)
      Inventories (59,049) (529,074)
      Prepaid expenses and other current assets (93,445) (52,770)
      Other assets (222,249)
      Accounts payable and accrued expenses 36,134 436,940
      Accrued payroll and related expenses (52,284) 167,238
      Net deferred revenue on shipments to distributors (29,908) 65,463
      Deferred service revenue 10,637 (6,976)
      Net change in operating lease (23,628) (18,750)
         Net cash (used in) provided by operating activities (452,413) 291,236
Investing activities    
  Purchases of equipment (134,919) (163,379)
       Net cash used in investing activities (134,919) (163,379)
Financing activities    
  Proceeds from note payable 1,000,000
  Repayments of note payable (125,000)
  Proceeds from stock options exercised 39,532 1,711,658
       Net cash (used in) provided by financing activities (85,468) 2,711,658
Net (decrease) increase in cash and cash equivalents (672,800) 2,839,515
Cash and cash equivalents at beginning of period 6,095,886 2,121,763
Cash and cash equivalents at end of period 5,423,086 4,961,278
Supplemental disclosure of cash flow information    
Cash paid for interest 49,460 39,327
Non-cash investing and financing activities    
  Conversion of note payable 130,000
  Acquisition of intangible assets 1,909,433
  Payroll tax liability for retired restricted stock $ 115,215