Income Taxes (Details) - Schedule of Unrecognized Tax Benefits Roll Forward - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020
Schedule of Unrecognized Tax Benefits Roll Forward [Abstract]
Balance at the beginning of the fiscal year	$ 1,354	$ 1,258
Additions based on positions taken in the current year	0	15
Additions based on positions taken in prior years	0	119
Decreases based on positions taken in prior years	0	(2)
Lapse in statute of limitations	(1,235)	(36)
Balance at the end of the fiscal year	$ 119	$ 1,354