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Statements of Cash Flows - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Operating activities    
  Net income (loss) $ 4,466,257 $ (3,278,601)
  Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
      Stock-based compensation 693,425 507,051
      Depreciation and amortization 759,158 596,900
      Deferred tax benefits (1,902,729)
      Forgiveness of PPP loan (1,058,700)
      Amortization of debt discount 33,091 11,030
      Goodwill impairment charges 4,427,000
  Changes in operating assets and liabilities:    
      Accounts receivable (463,726) 724,492
      Inventories (1,958,682) (16,934)
      Prepaid expenses and other current assets (59,774) (23,259)
      Other non-current assets (24,813)
      Accounts payable and accrued expenses 424,566 (712,147)
      Accrued payroll and related expenses 317,483 (190,839)
      Net deferred revenue on shipments to distributors (32,317) (96,631)
      Deferred service revenue (22,907) (19,295)
      Net change in operating lease (84,762) (65,622)
        Net cash provided by operating activities 2,144,270 804,445
Investing activities    
  Purchase of equipment (691,771) (536,481)
          Net cash used in investing activities (691,771) (536,481)
Financing activities    
  Payments on operating leases 8,291
  Common stock repurchase and related expenses (2,937) (8,480)
  Proceeds from borrowings under bank line of credit agreement 5,630,000
  Repayments of borrowings under bank line of credit agreement (7,042,449)
  Repayments of bank term loan (333,333)
  Proceeds from note payable 1,000,000 1,208,700
  Repayments of note payable (375,000) (150,000)
  Proceeds from subordinated convertible notes payable, net of discount 168,321
  Proceeds from subordinated convertible notes payable, net of discount-related party 1,262,406
  Stock options exercised 1,899,561 168,065
          Net cash provided by financing activities 2,521,624 894,939
Net increase (decrease) in cash and cash equivalents 3,974,123 1,162,903
Cash and cash equivalents at beginning of year 2,121,763 958,860
Cash and cash equivalents at end of year 6,095,886 2,121,763
Supplemental cash flow information    
  Cash paid for interest 176,091 94,417
  Cash paid for income taxes 6,289 4,918
Non-cash investing and financing activities    
  Conversion of note payable 130,000
  Acquisition of intangible assets $ 1,909,433