Summary of Accounting Policies (Tables)

12 Months Ended

Apr. 30, 2022

Accounting Policies [Abstract]

Disaggregation of Revenue [Table Text Block]

Total revenue recognized over time as POC method was approximately $46.4 million and $50.2 million of the $48.3 million and $54.3 million reported for the years ended April 30, 2022 and 2021, respectively. The amounts by segment and product line were as follows:

	Year Ended April 30, 2022
	(In thousands)
	POC			POT Revenue			Total Revenue
	Revenue
FEI-NY	$	39,618		$	1,539		$	41,157
FEI-Zyfer		6,770			1,057			7,827
Intersegment		(1	)		(687	)		(688	)
Revenue	$	46,387		$	1,909		$	48,296

	Year Ended April 30, 2021
	(In thousands)
	POC			POT Revenue			Total Revenue
	Revenue
FEI-NY	$	39,225		$	3,175		$	42,400
FEI-Zyfer		10,993			2,842			13,835
Intersegment		(10	)		(1,971	)		(1,981	)
Revenue	$	50,208		$	4,046		$	54,254

Revenue from External Customers by Products and Services [Table Text Block]

	Years Ended April 30,
	(in thousands)
	2022		2021
Revenues by Product Line:
Satellite Revenue	$	26,092	$	26,980
Government Non-Space Revenue		19,593		24,775
Other Commercial & Industrial Revenue		2,611		2,499
Consolidated revenues	$	48,296	$	54,254