Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash Flows from Operating Activities:
Net loss	$ (1,426,150)	$ (614,871)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities -
Depreciation and amortization	112,219	38,554
Provision for doubtful accounts receivable	1,497	8,083
Stock-based compensation expense	502,345	263,326
Non-cash consulting expense	45,000	210,000
Changes in operating assets and liabilities, net of effects of business acquisition
Accounts receivable	682,173	(723,369)
Inventories	(462,640)	137,510
Prepaid expenses	46,629	(106,456)
Accounts payable	(108,258)	69,365
Customer advances	(33,133)	(432,000)
Accrued compensation and other	47,826	118,165
Net cash provided by (used in) operating activities	(592,492)	(1,031,693)
Cash Flows from Investing Activities:
Cash acquired in business acquisition, net of $56,659 paid at year end	0	106,545
Cash paid for business acquisition	(1,443,341)	0
Additional patent costs	(41,142)	(6,812)
Purchases of fixed assets	(119,150)	(140,038)
Net cash used in investing activities	(1,603,633)	(40,305)
Cash Flows from Financing Activities:
Payment of capital lease obligation	(40,241)	(8,964)
Gross proceeds from private placements of common stock	265,000	2,925,000
Gross proceeds from exercise of stock options	8,675	53,900
Proceeds from Paycheck Protection Program bank loan	808,962	0
Private placement expenses paid	0	(12,250)
Net cash provided by financing activities	1,042,396	2,957,686
Net increase (decrease) in cash and cash equivalents	(1,153,729)	1,885,688
Cash and cash equivalents, beginning of year	2,288,426	402,738
Cash and cash equivalents, end of year	1,134,697	2,288,426
Supplemental Disclosure of Cash Flow Information:
Cash paid during the year for income taxes	912	912
Supplemental disclosure of non-cash financing activities:
Issuance of common stock for services	45,000	210,000
Offering costs included in accrued liabilities	22,250	12,250
Acquisition of manufacturing equipment under capital lease	$ 113,213	$ 0