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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
 9 Months Ended
Mar. 31, 2021
Mar. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net Income (Loss) $ 339,617 $ (1,103,065)
Adjustments to Reconcile Net Loss to Net Cash Used In Operating Activities -    
Depreciation and amortization 104,379 75,449
Stock-based compensation expense 314,252 426,778
Non-cash consulting expense 0 45,000
Gain on forgiveness of bank note (808,962) 0
Changes in Operating Assets and Liabilities -    
Accounts receivable, net (52,344) 686,030
Inventories 247,963 (432,919)
Prepaid expenses 1,551 49,057
Accounts payable (41,394) 359,079
Customer advances (184,175) (139,667)
Accrued compensation and other 3,693 (50,163)
Net Cash Used In Operating Activities (75,420) (84,421)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Cash paid for business acquisition (166,667) (1,443,341)
Additional patent costs (40,307) (32,821)
Purchases of property and equipment (49,160) (110,012)
Net Cash Used In Investing Activities (256,134) (1,586,174)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Payment of Capital Lease Obligation (49,569) (19,375)
Gross Proceeds from Private Placement of Common Stock 0 25,000
Gross Proceeds from Exercise of Stock Options 28,271 8,675
Private placement expense paid 0 0
Net Cash (Used In) Provided From Financing Activities (21,298) 14,300
NET DECREASE IN CASH AND CASH EQUIVALENTS (352,852) (1,656,295)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD 1,134,697 2,288,426
CASH AND CASH EQUIVALENTS, END OF PERIOD 781,845 632,131
SUPPLEMENTAL DISCLOSURE OF NON-CASH FINANCING AND INVESTING ACTIVITIES:    
Offering Costs Included in Accrued Liabilities 0 23,000
Acquisition of Manufacturing Equipment Under Capital Lease $ 161,977 $ 113,213