Note 5 - Accounts Receivable, Net, Contract Asset and Contract Liability (Tables)

9 Months Ended

Jan. 31, 2022

Notes Tables

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]

	January 31,		April 30,
	2022		2021
Accounts Receivable, net	$	2,172	$	1,961
Contract Asset		1,612		421
Contract Liability		1,056		5,798