Business Segments (Tables)

9 Months Ended

Jan. 31, 2019

Segment Reporting [Abstract]

Schedule of Financial Information Relating to Industry Segments

The following is financial information relating to industry segments:

	Three months ended Jan 31, 2019		Nine months ended Jan 31, 2019		Three months ended Jan 31, 2018		Nine months ended Jan 31, 2018
Net revenue:
Security alarm products	$	2,735,000	$	8,103,000	$	2,715,000	$	6,683,000
Cable & wiring tools		576,000		1,929,000		—		—
Other products		144,000		519,000		545,000		1,914,000
Total net revenue	$	3,455,000	$	10,551,000	$	3,260,000	$	8,597,000
Income from operations:
Security alarm products	$	659,000	$	1,972,000	$	452,000	$	1,534,000
Cable & wiring tools		138,000		415,000		—		—
Other products		35,000		104,000		130,000		439,000
Total income from operations	$	832,000	$	2,491,000	$	582,000	$	1,973,000
Depreciation and amortization:
Security alarm products	$	37,000	$	57,000	$	10,000	$	28,000
Cable & wiring tools		30,000		92,000
Other products		—		55,000		52,000		94,000
Corporate general		14,000		44,000		15,000		41,000
Total depreciation and amortization	$	81,000	$	248,000	$	77,000	$	163,000
Capital expenditures:
Security alarm products	$	35,000	$	35,000	$	—	$	260,000
Cable & wiring tools		—		—
Other products		37,000		37,000		—		—
Corporate general		16,000		16,000		16,000		81,000
Total capital expenditures	$	88,000	$	88,000	$	16,000	$	341,000

	January 31, 2019		April 30, 2018
Identifiable assets:
Security alarm products	$	5,255,000	$	4,564,000
Cable & wiring tools		2,679,000		2,347,000
Other products		842,000		1,521,000
Corporate general		32,144,000		32,510,000
Total assets	$	40,920,000	$	40,942,000