Certificates of Deposit and Marketable Securities (Tables)

6 Months Ended

Nov. 30, 2017

Investments, Debt and Equity Securities [Abstract]

Summary of assets measured at fair value on recurring basis

November 30, 2017	Level 1		Level 2		Level 3		Total
Certificates of Deposit	$	-	$	496,000	$	-	$	496,000
Equity Securities		35,872		-		-		35,872
	$	35,872	$	496,000	$	-	$	531,872

May 31, 2017	Level 1		Level 2		Level 3		Total
Certificates of Deposit	$	-	$	992,000	$	-	$	992,000
Equity Securities		28,888		-		-		28,888
	$	28,888	$	992,000	$	-	$	1,020,888

Summary of certificates of deposit and marketable securities

November 30, 2017	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Recorded Value
Current
Certificates of Deposit	$	496,000	$	-	$	-	$	496,000
Equity Securities		16,866		19,006		-		35,872
	$	512,866	$	19,006	$	-	$	531,872

May 31, 2017	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Recorded Value
Current
Certificates of Deposit	$	992,000	$	-	$	-	$	992,000
Equity Securities		16,866		12,022		-		28,888
	$	1,008,866	$	12,022	$	-	$	1,020,888