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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 3 Months Ended
Sep. 30, 2023
Sep. 30, 2022
CASH FLOW FROM OPERATING ACTIVITIES:    
Net loss $ (337,201) $ (1,426,570)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation 11,390 15,819
Amortization of intangible assets 244,918 179,894
Stock based compensation 51,589 180,745
Amortization of right of use assets 75,935 72,836
Deferred tax benefit (50,860) (104,183)
Change in assets and liabilities:    
Accounts receivable (978,093) 388,567
Inventories 1,479,279 (855,392)
Prepaid expenses and other current assets (22,124) 8,707
Advance payments to vendors (35,095) 28,776
Other assets 2,394 9,909
Accounts payable (5,800,795) 537,395
Income tax payable (6,556) (4,932)
Advance payment from customers 21,434 0
Unearned revenue from customers 59,532 70,113
Lease liabilities (79,155) (76,057)
Accrued liabilities 140,092 (37,767)
Net cash used in operating activities (5,223,316) (1,012,140)
CASH FLOW FROM INVESTING ACTIVITIES:    
(Purchases) sales of short-term investments (73,832) 1,080,659
Purchases of property and equipment (2,427) (26,674)
Payments for capitalized product development costs (22,500) (493,250)
Purchases of intangible assets 0 (6,854)
Net cash (used in) provided by investing activities (98,759) 553,881
CASH FLOW FROM FINANCING ACTIVITIES:    
Loan to an employee (1,023) 0
Net cash used in financing activities (1,023) 0
Effect of foreign currency translation (73,469) (314,218)
Net decrease in cash and cash equivalents (5,396,567) (772,477)
Cash and cash equivalents, beginning of year 12,241,286 26,277,418
Cash and cash equivalents, end of year 6,844,719 25,504,941
Cash paid during the periods for:    
Income taxes $ (45,800) $ (800)