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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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Segment Data (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
Segment Data (Details) - USD ($) $ in Thousands	Apr. 30, 2016	Jan. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	Apr. 30, 2015	Jan. 31, 2015	Nov. 01, 2014	Aug. 02, 2014	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2014
Segment Data
Revenue	$ 84,757	$ 67,560	$ 64,731	$ 47,050	$ 86,471	$ 68,397	$ 52,664	$ 51,866	$ 264,098	$ 259,398	$ 251,703
Cost of sales									151,995	155,130	158,090
Total gross margin	$ 37,922	$ 26,625	$ 31,533	$ 16,023	$ 45,350	$ 26,993	$ 17,871	$ 14,054	112,103	104,268	93,613
Selling, general and administrative									60,077	55,763	55,679
Research and development									42,291	46,491	25,515
Income from operations									9,735	2,014	12,419
Interest income									1,032	882	855
Other (expense) income									(2,699)	(1,003)	1,622
Income before income taxes									8,068	1,893	14,896
Inter-segment and corporate elimination
Segment Data
Revenue									0	0	0
UAS
Segment Data
Revenue									233,738	220,950	208,810
Cost of sales									132,209	128,233	127,992
Total gross margin									101,529	92,717	80,818
EES
Segment Data
Revenue									30,360	38,448	42,893
Cost of sales									19,786	26,897	30,098
Total gross margin									$ 10,574	$ 11,551	$ 12,795