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Condensed Statement of Cash Flows - USD ($)
 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Operating activities    
  Net income (loss) $ 2,830,009 $ (858,350)
  Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
      Stock-based compensation 320,780 263,434
      Depreciation and amortization 352,849 290,498
      Amortization of debt discount 16,546
      Deferred tax benefits (1,870,000)
Changes in operating assets and liabilities:    
      Accounts receivable (355,767) 1,066,894
      Inventories (823,668) (74,801)
      Prepaid expenses and other current assets (440,006) 56,788
      Accounts payable and accrued expenses 127,756 (253,163)
      Accrued payroll and related expenses 272,841 (108,172)
      Net deferred revenue on shipments to distributors 70,131 (98,493)
      Deferred service revenue (13,522) (12,143)
      Net change in operating lease (37,502) (28,121)
         Net cash provided by (used in) operating activities 450,447 244,371
Investing activities    
  Purchases of equipment (304,613) (256,183)
       Net cash used in investing activities (304,613) (256,183)
Financing activities    
  Payments on finance leases (8,291)
  Repurchase and retirement of common stock (1,176) (8,025)
  Proceeds from borrowings under bank line of credit agreement 4,630,000
  Repayments of borrowings under bank line of credit agreement (5,592,449)
  Proceeds from note payable 1,000,000 1,208,700
  Repayments of note payable (125,000) (250,000)
  Stock options exercised 1,778,547
       Net cash provided by (used in) financing activities 2,652,371 (20,065)
Net increase (decrease) in cash and cash equivalents 2,798,205 (31,877)
Cash and cash equivalents at beginning of period 2,121,763 958,860
Cash and cash equivalents at end of period 4,919,968 926,983
Supplemental disclosure of cash flow information    
Cash paid for interest 90,933 30,640
Non-cash investing and financing activities    
  Conversion of note payable 130,000
  Acquisition of intangible assets $ 1,909,433