Segment Information (Tables)

3 Months Ended

Oct. 31, 2015

Segment Reporting [Abstract]

Segment information

Segment information is presented in the tables below:

	Three months ended October 31, 2015
	Telecommunications Transmission			RF Microwave Amplifiers	Mobile Data Communications	Unallocated		Total
Net sales	$	35,249,000		22,654,000	6,214,000	—		$	64,117,000
Operating income (loss)	2,361,000			1,968,000	2,999,000	(5,160,000	)	2,168,000
Interest income and other (expense)	(17,000		)	—	3,000	126,000		112,000
Interest expense	75,000			—	—	—		75,000
Depreciation and amortization	1,943,000			874,000	81,000	1,059,000		3,957,000
Expenditure for long-lived assets, including intangibles	470,000			142,000	22,000	2,000		636,000
Total assets at October 31, 2015	223,949,000			87,086,000	4,859,000	143,148,000		459,042,000

	Three months ended October 31, 2014
	Telecommunications Transmission			RF Microwave Amplifiers		Mobile Data Communications	Unallocated		Total
Net sales	$	51,356,000		18,764,000		6,271,000	—		$	76,391,000
Operating income (loss)	8,166,000			1,063,000		2,867,000	(3,877,000	)	8,219,000
Interest income and other (expense)	(29,000		)	(18,000	)	3,000	128,000		84,000
Interest expense	67,000			—		—	198,000		265,000
Depreciation and amortization	2,213,000			879,000		70,000	1,344,000		4,506,000
Expenditure for long-lived assets, including intangibles	538,000			92,000		84,000	33,000		747,000
Total assets at October 31, 2014	239,365,000			87,467,000		4,898,000	137,509,000		469,239,000