CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating activities:
Net income (loss)	$ (703,300)	$ 645,600
Adjustments to reconcile net income to net cash provided by operating activities:
(Gain) loss on sale of investment securities	(4,400)	13,200
Depreciation and amortization	160,900	257,300
Deferred income tax (benefit) expense	(106,000)	(38,500)
Unrealized holding (gain) loss on investment securities	12,400	(3,000)
Bad debt recovery	3,400	0
Gain on sale of fixed assets	(300)	0
Stock-based compensation	65,800	46,800
Change in fair value of contingent consideration	112,600	521,200
Changes in operating assets and liabilities:
Trade accounts receivable	906,800	(6,500)
Inventories	(292,400)	(324,400)
Income tax receivable	(334,800)	0
Prepaid expenses and other assets	(22,400)	(60,100)
Right-of-use assets	(803,300)	0
Accounts payable	(214,400)	141,000
Lease liabilities	867,700	0
Accrued expenses and taxes	191,500	(109,300)
Contract liabilities	89,000	(63,800)
Bank overdraft	(96,900)	140,000
Total adjustments	535,200	513,900
Net cash (used in) provided by operating activities	(168,100)	1,159,500
Investing activities:
Purchase of investment securities	(63,400)	(157,900)
Redemption of investment securities	55,000	151,900
Proceeds from sale of fixed assets	1,000	0
Capital expenditures	(50,900)	(187,800)
Purchase of other intangible assets	(25,800)	(24,600)
Net cash used in investing activities	(84,100)	(218,400)
Financing activities:
Principal payments on note payable	0	(5,800)
Cash dividend declared and paid	0	(74,700)
Proceeds from Payroll Protection Program loan	563,800	0
Line of credit proceeds	0	50,000
Issuance of common stock and warrants, net of issuance costs	6,004,400	0
Line of credit repayments	0	(50,000)
Proceeds from exercise of stock options	13,800	0
Payments for contingent consideration	(372,600)	(311,200)
Net cash provided by (used in) financing activities	6,209,400	(391,700)
Net increase in cash and cash equivalents	5,957,200	549,400
Cash and cash equivalents, beginning of year	1,602,500	1,053,100
Cash and cash equivalents, end of year	7,559,700	1,602,500
Cash paid during the period for:
Income Taxes	40,900	56,700
Interest	$ 0	$ 1,500