Business Segments (Tables)

12 Months Ended

Apr. 30, 2019

Segment Reporting [Abstract]

Schedule of Financial Information Relating to Industry Segments

The following is financial information relating to industry segments:

	Quarter ended		Year ended		Year ended
	April 30,		April 30,		April 30,
	2019		2019		2018
Net revenue:
Security alarm products	$	2,872,000	$	11,006,000	$	8,423,000
Cable & wiring tools		527,000		2,431,000		1,326,000
Other products		175,000		689,000		2,182,000
Total net revenue	$	3,574,000	$	14,126,000	$	11,931,000
Income from operations:
Security alarm products		654,000		2,656,000		1,759,000
Cable & wiring tools		120,000		488,000		277,000
Other products		40,000		162,000		456,000
Total income from operations	$	814,000	$	3,306,000	$	2,492,000
Depreciation and amortization:
Security alarm products		38,000		95,000		37,000
Cable & wiring tools		31,000		123,000		62,000
Other products		19,000		74,000		103,000
Corporate general		18,000		62,000		55,000
Total depreciation and amortization	$	106,000	$	354,000	$	257,000
Capital expenditures:
Security alarm products		39,000		75,000		280,000
Cable & wiring tools		—		—		—
Other products		19,000		56,000		172,000
Corporate general		8,000		23,000		81,000
Total capital expenditures	$	66,000	$	154,000	$	533,000

	April 30, 2019		April 30, 2018
Identifiable assets:
Security alarm products		6,179,000		4,561,000
Cable & wiring tools		2,713,000		2,347,000
Other products		842,000		1,521,000
Corporate general		33,293,000		32,510,000
Total assets	$	43,027,000	$	40,942,000