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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 9 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Cash flows from operating activities:    
Net loss $ (3,238,031) $ (2,182,391)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:    
Depreciation and amortization 2,359,550 2,763,620
Interest from amortization of debt costs 55,680 33,414
(Gain) loss on disposal of property and equipment (55,910) 337
Stock-based compensation on stock options, RSUs & RSAs, net 1,071,183 541,472
Provision for doubtful accounts receivable 9,622 20,200
Change in operating lease assets and liabilities (89,306) (184,058)
Inventory write-offs to allowance 70,566 188,011
Deferred tax benefit (12,620) 0
Changes in operating assets and liabilities:    
Trade accounts receivable 413,193 (340,737)
Other receivables 0 105,598
Inventories (1,317,347) 853,727
Prepaid expenses and other assets (63,624) 36,486
Accounts payable and accrued liabilities (123,542) (1,483,281)
Net cash (used in) provided by operating activities (920,586) 352,398
Cash flows from investing activities:    
Purchase of property and equipment (2,325,155) (1,492,668)
Proceeds from sale of equipment 65,500 0
Net cash used in investing activities (2,259,655) (1,492,668)
Cash flows from financing activities:    
Proceeds from sale of common stock from Employee Stock Purchase Plan 40,380 51,711
Proceeds from issuance of common stock under public equity placement 9,204,510 0
Loan costs 0 (61,223)
Borrowings on loans payable 0 266,850
Payments on loans payable (1,648,899) (509,754)
Repayment of finance lease obligations (63,345) (172,344)
Net cash provided by (used in) financing activities 7,532,646 (424,760)
Effect of exchange rate on cash and cash equivalents 42,601 31,282
Change in cash and cash equivalents 4,395,006 (1,533,748)
Cash and cash equivalents, beginning of period 5,507,891 6,774,694
Cash and cash equivalents, end of period 9,902,897 5,240,946
Supplemental disclosure of cash flow information:    
Interest paid in cash 170,109 118,094
Income taxes paid 323,414 243,162
Supplemental disclosure of non-cash investing & financing activities:    
Purchase of equipment through finance lease arrangements $ 83,921 $ 0