3. Fair Value of Financial Instruments (Tables)

12 Months Ended

Jun. 30, 2020

Fair Value Disclosures [Abstract]

Fair value inputs

			Fair Value Measurements Using Inputs Considered as
	Fair Value at  June 30, 2020		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	7,559,700	$	7,559,700	$	-	$	-
Investment securities		331,800		331,800		-		-
Total	$	7,891,500	$	7,891,500	$	-	$	-
Liabilities:
Contingent consideration	$	358,000	$	-	$	-	$	358,000

			Fair Value Measurements Using Inputs Considered as
	Fair Value at  June 30, 2019		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	1,602,500	$	1,602,500	$	-	$	-
Investment securities		330,900		330,900		-		-
Total	$	1,933,400	$	1,933,400	$	-	$	-
Liabilities:
Contingent consideration	$	618,000	$	-	$	-	$	618,000

Analysis of changes in Level 3 financial liabilities

	2020			2019
Beginning balance	$	618,000		$	408,000
Increase in contingent consideration liability		112,600			521,200
Payments and accruals		(372,600	)		(311,200	)
Ending balance	$	358,000		$	618,000

Investments in marketable securitites

	Cost		Fair Value		Unrealized  Holding  Gain (Loss)
At June 30, 2020:
Equity securities	$	77,600	$	101,900	$	24,300
Mutual funds		250,300		229,900		(20,400	)
	$	327,900	$	331,800	$	3,900

	Cost		Fair Value		Unrealized  Holding  Gain (Loss)
At June 30, 2019:
Equity securities	$	47,100	$	72,000	$	24,900
Mutual funds		292,300		258,900		(33,400	)
	$	339,400	$	330,900	$	(8,500	)