Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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- Definition

Carrying amount as of the balance sheet date of known and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid after one year or beyond the next operating cycle, if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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Cost Reduction Actions Wind-Down of Microsatellite Product Line (Details) (USD $)	3 Months Ended		6 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014	Jan. 31, 2013
Restructuring reserve, noncurrent	$ 4,002,000		$ 4,002,000
Wind-Down of Microsatellite Product Line [Member]
Pre-tax restructuring charge	0	(253,000)	0	569,000
Restructuring reserve, current	282,000		282,000
Restructuring reserve, noncurrent	106,000		106,000
Restructuring Reserve [Roll Forward]
Restructuring reserve - beginning balance			463,000
Payments made			(75,000)
Restructuring reserve - ending balance	388,000		388,000
Wind-Down of Microsatellite Product Line [Member] \| Facility Exit Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve - beginning balance			413,000
Payments made			(75,000)
Restructuring reserve - ending balance	338,000		338,000
Wind-Down of Microsatellite Product Line [Member] \| Other [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve - beginning balance			50,000
Payments made			0
Restructuring reserve - ending balance	$ 50,000		$ 50,000