Investments (Tables)

12 Months Ended

Apr. 30, 2017

Investments, Debt and Equity Securities [Abstract]

Components of Investments

Investments consist of the following (in thousands):

	April 30,
	2017		2016
Trading:
Debt securities:
Tax-exempt state and municipal bonds	$	14,803	$	21,487
Corporate bonds		0		196
Total debt securities		14,803		21,683
Marketable equity securities		8,984		7,198
	$	23,787	$	28,881

Contractual Maturities of Debt Securities Classified as Trading

The contractual maturities of debt securities classified as trading at April 30, 2017 and 2016 were as follows (in thousands):

	2017		2016
Due within one year	$	10,368	$	13,779
Due within two years		4,435		7,763
Due within three years		—		105
Due after three years		—		36
	$	14,803	$	21,683