Segment Information (Tables)

9 Months Ended

Apr. 30, 2015

Segment Reporting [Abstract]

Segment information

Segment information is presented in the tables below:

	Three months ended April 30, 2015
	Telecommunications Transmission			RF Microwave Amplifiers	Mobile Data Communications	Unallocated		Total
Net sales	$	45,642,000		19,676,000	6,315,000	—		$	71,633,000
Operating income (loss)	7,283,000			1,254,000	2,642,000	(4,019,000	)	7,160,000
Interest income and other (expense)	(6,000		)	6,000	4,000	103,000		107,000
Interest expense	72,000			—	—	—		72,000
Depreciation and amortization	2,198,000			940,000	78,000	1,255,000		4,471,000
Expenditure for long-lived assets, including intangibles	403,000			117,000	149,000	19,000		688,000
Total assets at April 30, 2015	237,811,000			95,217,000	6,213,000	134,554,000		473,795,000

	Three months ended April 30, 2014
	Telecommunications Transmission		RF Microwave Amplifiers		Mobile Data Communications	Unallocated		Total
Net sales	$	61,235,000	22,499,000		5,171,000	—		$	88,905,000
Operating income (loss)	10,353,000		1,445,000		2,318,000	(3,549,000	)	10,567,000
Interest income and other (expense)	21,000		(14,000	)	3,000	246,000		256,000
Interest expense	62,000		—		—	1,931,000		1,993,000
Depreciation and amortization	2,193,000		939,000		62,000	1,086,000		4,280,000
Expenditure for long-lived assets, including intangibles	916,000		158,000		38,000	—		1,112,000
Total assets at April 30, 2014	251,156,000		89,177,000		5,811,000	287,461,000		633,605,000

	Nine months ended April 30, 2015
	Telecommunications Transmission			RF Microwave Amplifiers		Mobile Data Communications	Unallocated		Total
Net sales	$	150,865,000		60,086,000		18,875,000	—		$	229,826,000
Operating income (loss)	26,498,000			3,286,000		8,218,000	(12,000,000	)	26,002,000
Interest income and other (expense)	(61,000		)	(19,000	)	10,000	351,000		281,000
Interest expense	208,000			—		—	198,000		406,000
Depreciation and amortization	6,607,000			2,725,000		220,000	3,668,000		13,220,000
Expenditure for long-lived assets, including intangibles	1,683,000			791,000		293,000	66,000		2,833,000
Total assets at April 30, 2015	237,811,000			95,217,000		6,213,000	134,554,000		473,795,000

	Nine months ended April 30, 2014
	Telecommunications Transmission		RF Microwave Amplifiers		Mobile Data Communications		Unallocated		Total
Net sales	$	172,121,000	64,737,000		20,914,000		—		$	257,772,000
Operating income (loss)	29,550,000		3,113,000		9,697,000		(10,522,000	)	31,838,000
Interest income and other (expense)	9,000		(32,000	)	9,000		771,000		757,000
Interest expense (income)	182,000		—		(3,000	)	5,830,000		6,009,000
Depreciation and amortization	6,683,000		2,827,000		199,000		3,134,000		12,843,000
Expenditure for long-lived assets, including intangibles	3,830,000		415,000		284,000		7,000		4,536,000
Total assets at April 30, 2014	251,156,000		89,177,000		5,811,000		287,461,000		633,605,000