Investments - Schedule of Unrealized Loss Breakdown by Investment (Details) - USD ($)	Jul. 31, 2019	Apr. 30, 2019
Less than 12 months Fair Value	$ 1,975,000	$ 1,704,000
Less than 12 months Unrealized Loss	(147,000)	(106,000)
12 months or greater Fair Value	1,207,000	2,264,000
12 months or greater Unrealized Loss	(165,000)	(251,000)
Total Fair Value	3,182,000	3,968,000
Total Unrealized Loss	(312,000)	(357,000)
Municipal Bonds [Member]
Less than 12 months Fair Value		772,000
Less than 12 months Unrealized Loss		(4,000)
12 months or greater Fair Value	448,000	580,000
12 months or greater Unrealized Loss	(43,000)	(50,000)
Total Fair Value	448,000	1,352,000
Total Unrealized Loss	(43,000)	(54,000)
REITs [Member]
Less than 12 months Fair Value
Less than 12 months Unrealized Loss
12 months or greater Fair Value	30,000	32,000
12 months or greater Unrealized Loss	(9,000)	(6,000)
Total Fair Value	30,000	32,000
Total Unrealized Loss	(9,000)	(6,000)
Equity Securities [Member]
Less than 12 months Fair Value	1,975,000	932,000
Less than 12 months Unrealized Loss	(147,000)	(102,000)
12 months or greater Fair Value	729,000	1,652,000
12 months or greater Unrealized Loss	(113,000)	(195,000)
Total Fair Value	2,704,000	2,584,000
Total Unrealized Loss	$ (260,000)	$ (297,000)