| Segment information |
Segment information is presented in the tables below:
| | | | | | | | | | | | | | | | | | | | | Three months ended January 31, 2016 | | | Telecommunications Transmission | | RF Microwave Amplifiers | | Mobile Data Communications | | Unallocated | | Total | Net sales | | $ | 38,544,000 |
| | 24,933,000 |
| | 6,846,000 |
| | — |
| | $ | 70,323,000 |
| Operating income (loss) | | 4,803,000 |
| | 1,382,000 |
| | 3,735,000 |
| | (6,731,000 | ) | | 3,189,000 |
| Interest income and other (expense) | | (15,000 | ) | | (7,000 | ) | | 2,000 |
| | 130,000 |
| | 110,000 |
| Interest expense | | 73,000 |
| | — |
| | — |
| | — |
| | 73,000 |
| Depreciation and amortization | | 1,715,000 |
| | 860,000 |
| | 79,000 |
| | 1,082,000 |
| | 3,736,000 |
| Expenditure for long-lived assets, including intangibles | | 777,000 |
| | 29,000 |
| | 8,000 |
| | 13,000 |
| | 827,000 |
| Total assets at January 31, 2016 | | 212,211,000 |
| | 87,070,000 |
| | 6,415,000 |
| | 156,474,000 |
| | 462,170,000 |
|
| | | | | | | | | | | | | | | | | | | | | Three months ended January 31, 2015 | | | Telecommunications Transmission | | RF Microwave Amplifiers | | Mobile Data Communications | | Unallocated | | Total | Net sales | | $ | 53,867,000 |
| | 21,646,000 |
| | 6,289,000 |
| | — |
| | $ | 81,802,000 |
| Operating income (loss) | | 11,049,000 |
| | 969,000 |
| | 2,709,000 |
| | (4,104,000 | ) | | 10,623,000 |
| Interest income and other (expense) | | (26,000 | ) | | (7,000 | ) | | 3,000 |
| | 120,000 |
| | 90,000 |
| Interest expense | | 69,000 |
| | — |
| | — |
| | — |
| | 69,000 |
| Depreciation and amortization | | 2,196,000 |
| | 906,000 |
| | 72,000 |
| | 1,069,000 |
| | 4,243,000 |
| Expenditure for long-lived assets, including intangibles | | 742,000 |
| | 582,000 |
| | 60,000 |
| | 14,000 |
| | 1,398,000 |
| Total assets at January 31, 2015 | | 240,413,000 |
| | 92,918,000 |
| | 6,002,000 |
| | 132,154,000 |
| | 471,487,000 |
|
| | | | | | | | | | | | | | | | | | | | | Six months ended January 31, 2016 | | | Telecommunications Transmission | | RF Microwave Amplifiers | | Mobile Data Communications | | Unallocated | | Total | Net sales | | $ | 73,793,000 |
| | 47,587,000 |
| | 13,060,000 |
| | — |
| | $ | 134,440,000 |
| Operating income (loss) | | 7,164,000 |
| | 3,350,000 |
| | 6,734,000 |
| | (11,891,000 | ) | | 5,357,000 |
| Interest income and other (expense) | | (32,000 | ) | | (7,000 | ) | | 5,000 |
| | 256,000 |
| | 222,000 |
| Interest expense | | 148,000 |
| | — |
| | — |
| | — |
| | 148,000 |
| Depreciation and amortization | | 3,658,000 |
| | 1,734,000 |
| | 160,000 |
| | 2,141,000 |
| | 7,693,000 |
| Expenditure for long-lived assets, including intangibles | | 1,247,000 |
| | 171,000 |
| | 30,000 |
| | 15,000 |
| | 1,463,000 |
| Total assets at January 31, 2016 | | 212,211,000 |
| | 87,070,000 |
| | 6,415,000 |
| | 156,474,000 |
| | 462,170,000 |
|
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