Fair Value Measurements (Tables)

12 Months Ended

Apr. 30, 2017

Fair Value Disclosures [Abstract]

Schedule of Assets Measured at Fair Value on a Recurring Basis

As required by US GAAP, assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.

	Assets Measured at Fair Value on a Recurring Basis as of April 30, 2017
	Level 1		Level 2		Level 3		Total
Assets:
Municipal Bonds		—	$	6,038,000		—	$	6,038,000
Corporate Bonds	$	130,000		—		—	$	130,000
REITs		—	$	76,000		—	$	76,000
Equity Securities	$	17,381,000		—		—	$	17,381,000
Money Markets and CDs	$	2,757,000		—		—	$	2,757,000
Total fair value of assets measured on a recurring basis	$	20,268,000	$	6,114,000		—	$	26,382,000

	Assets Measured at Fair Value on a Recurring Basis as of April 30, 2016
	Level 1		Level 2		Level 3		Total
Assets:
Municipal Bonds		—	$	6,383,000		—	$	6,383,000
Corporate Bonds	$	126,000		—		—	$	126,000
REITs		—	$	44,000		—	$	44,000
Equity Securities	$	15,499,000		—		—	$	15,499,000
Money Markets and CDs	$	2,478,000		—		—	$	2,478,000
Total fair value of assets measured on a recurring basis	$	18,103,000	$	6,427,000		—	$	24,530,000