Long-Lived Assets - Schedule of Long Lived Assets Held-for-Sale (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016
Long Lived Assets Held-for-sale [Line Items]
Tooling and equipment, gross	$ 111	$ 111
Less accumulated depreciation	(111)	(111)
Tooling and equipment, net	0	0
Furniture and Fixtures Leasehold Improvements Office Equipment and Computers [Member]
Long Lived Assets Held-for-sale [Line Items]
Tooling and equipment, gross	$ 85	85
Furniture and Fixtures Leasehold Improvements Office Equipment and Computers [Member] | Minimum [Member]
Long Lived Assets Held-for-sale [Line Items]
Estimated Useful Life	3 years
Furniture and Fixtures Leasehold Improvements Office Equipment and Computers [Member] | Maximum [Member]
Long Lived Assets Held-for-sale [Line Items]
Estimated Useful Life	5 years
Website and Software [Member]
Long Lived Assets Held-for-sale [Line Items]
Estimated Useful Life	3 years
Tooling and equipment, gross	$ 26	$ 26