Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016
Net income	$ 14,738	$ 10,367	$ 7,291
Other comprehensive income, net of tax:
Change in unrealized gains on securities, net of taxes	325	333	20
Other comprehensive income	325	333	20
Comprehensive income	$ 15,063	$ 10,700	$ 7,311