Investments (Tables)

12 Months Ended

Apr. 30, 2014

Components of Investments

Investments consist of the following (in thousands):

	April 30,
	2014		2013
Trading:
Debt securities:
Tax-exempt state and municipal bonds	$	15,167	$	13,031
Corporate bonds		1,188		1,486
Certificates of deposit		—		240
Other government bonds		—		278
Total debt securities		16,355		15,035
Marketable equity securities		7,416		9,999
	$	23,771	$	25,034

Held to Maturity Investments Which are Not Recorded at Fair Value

	April 30, 2014
	Carrying value		Unrealized Gain		Unrealized Loss		Fair value
Held-to-maturity:
Certificates of deposit	$	—	$	—	$	—	$	—
Tax-exempt state and municipal bonds		—		—		—		—
	$	—	$	—	$	—	$	—
	April 30, 2013
	Carrying value		Unrealized Gain		Unrealized Loss		Fair value
Held-to-maturity:
Certificates of deposit	$	—	$	—	$	—	$	—
Tax-exempt state and municipal bonds		226		1		—		227
	$	226	$	1	$	—	$	227

Contractual Maturities of Debt Securities Classified as Trading

The contractual maturities of debt securities classified as trading at April 30, 2014 and 2013 were as follows (in thousands):

	2014		2013
Due within one year	$	7,646	$	8,648
Due within two years		6,228		4,776
Due within three years		1,970		751
Due after three years		511		860
	$	16,355	$	15,035

Contractual Maturities of Debt Securities Classified as Held to Maturity

The contractual maturities of debt securities classified as held-to-maturity at April 30, 2014 and 2013 were as follows (in thousands):

	2014		2013
Due within one year	$	—	$	226
Due within two years		—		—
Due within three years		—		—
Due after three years		—		—
	$	—	$	226