Note 4 - Investments - Income From Securities Transactions (Details) - USD ($)		12 Months Ended
		Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016
Dividend income		$ 226,000	$ 193,000	$ 142,000
Interest income		103,000	33,000
Capital gain distributions from ETFs (1)	[1]	152,000	39,000	105,000
Capital gains (2)	[2]			224,000
Other		59,000	47,000	6,000
Total income from securities transactions and other, net		$ 540,000	$ 312,000	$ 477,000

[1] Capital gain distributions of $152,000, $39,000 and $105,000 were reclassified from Accumulated Other Comprehensive Income in the Consolidated Balance Sheets to the Consolidated Statements of Income in fiscal 2018, 2017 and 2016, respectively.

[2] Capital gains of $224,000 were reclassified from Accumulated Other Comprehensive Income in the Consolidated Balance Sheets to the Consolidated Statements of Income in fiscal 2016.