Segment Information (Tables)

6 Months Ended

Jan. 31, 2013

Segment Reporting [Abstract]

Segment information

	Three months ended January 31, 2013
	Telecommunications Transmission			RF Microwave Amplifiers		Mobile Data Communications		Unallocated		Total
Net sales	$	45,769,000		20,362,000		8,446,000		—		$	74,577,000
Operating income (loss)	5,549,000			645,000		2,994,000		(3,241,000	)	5,947,000
Interest income and other (expense)	(26,000		)	(7,000	)	3,000		345,000		315,000
Interest expense (income)	80,000			—		(6,000	)	1,956,000		2,030,000
Depreciation and amortization	2,427,000			977,000		134,000		844,000		4,382,000
Expenditure for long-lived assets, including intangibles	1,228,000			135,000		26,000		5,000		1,394,000
Total assets at January 31, 2013	226,656,000			93,208,000		10,651,000		354,232,000		684,747,000

	Three months ended January 31, 2012
	Telecommunications Transmission		RF Microwave Amplifiers		Mobile Data Communications	Unallocated		Total
Net sales	$	51,328,000	22,437,000		25,376,000	—		$	99,141,000
Operating income (loss)	8,319,000		1,195,000		4,408,000	(3,268,000	)	10,654,000
Interest income and other (expense)	14,000		(3,000	)	7,000	416,000		434,000
Interest expense	166,000		—		—	2,017,000		2,183,000
Depreciation and amortization	2,507,000		1,101,000		397,000	1,084,000		5,089,000
Expenditure for long-lived assets, including intangibles	799,000		369,000		49,000	—		1,217,000
Total assets at January 31, 2012	241,369,000		103,445,000		25,160,000	395,426,000		765,400,000

	Six months ended January 31, 2013
	Telecommunications Transmission			RF Microwave Amplifiers		Mobile Data Communications		Unallocated		Total
Net sales	$	99,096,000		45,651,000		20,783,000		—		$	165,530,000
Operating income (loss)	17,808,000			2,363,000		6,465,000		(7,327,000	)	19,309,000
Interest income and other (expense)	(35,000		)	(29,000	)	12,000		643,000		591,000
Interest expense (income)	239,000			—		(6,000	)	3,908,000		4,141,000
Depreciation and amortization	4,863,000			1,957,000		286,000		1,628,000		8,734,000
Expenditure for long-lived assets, including intangibles	2,069,000			342,000		41,000		5,000		2,457,000
Total assets at January 31, 2013	226,656,000			93,208,000		10,651,000		354,232,000		684,747,000

	Six months ended January 31, 2012
	Telecommunications Transmission		RF Microwave Amplifiers		Mobile Data Communications	Unallocated		Total
Net sales	$	108,124,000	43,550,000		60,828,000	—		$	212,502,000
Operating income (loss)	21,353,000		1,518,000		13,771,000	(10,229,000	)	26,413,000
Interest income and other (expense)	20,000		(6,000	)	16,000	900,000		930,000
Interest expense	332,000		—		—	3,997,000		4,329,000
Depreciation and amortization	5,074,000		2,204,000		817,000	2,006,000		10,101,000
Expenditure for long-lived assets, including intangibles	2,070,000		475,000		115,000	—		2,660,000
Total assets at January 31, 2012	241,369,000		103,445,000		25,160,000	395,426,000		765,400,000