FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

9 Months Ended

Jan. 31, 2021

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

The cost, gross unrealized gains, gross unrealized losses, and fair market value of available-for-sale securities at January 31, 2021 and April 30, 2020, respectively, were as follows (in thousands):

	January 31, 2021
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
Fixed income securities	$	10,029	$	492	$	(41	)	$	10,480

	April 30, 2020
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
Fixed income securities	$	10,081	$	495	$	(6	)	$	10,570

Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]

The following table presents the fair value and unrealized losses, aggregated by investment type and length of time that individual securities have been in a continuous unrealized loss position (in thousands):

	Less than 12 months					12 Months or more					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
January 31, 2021
Fixed Income Securities	$	378	$	(8	)	$	1,230	$	(33	)	$	1,608	$	(41	)
April 30, 2020
Fixed Income Securities	$	380	$	(6	)	$	-	$	-		$	380	$	(6	)

Investments Classified by Contractual Maturity Date [Table Text Block]

Maturities of fixed income securities classified as available-for-sale at January 31, 2021 were as follows, at cost (in thousands):

Current	$	3,343
Due after one year through five years		4,109
Due after five years		2,577
	$	10,029