Commitments and Contingencies (Details Narrative) $ in Thousands	1 Months Ended	12 Months Ended
	Sep. 30, 2007 USD ($)	Jul. 31, 2018 USD ($) ft²	Jul. 31, 2017 USD ($)
Area of land | ft²		4,000
Lease expiration date description		The lease commenced September 15, 2014 and originally expired on September 30, 2015 and we have exercised our option to renew the lease and extended the expiration to September 15, 2017.
Operating leases, rent expense		$ 45	$ 44
Manufacturing costs	$ 471
Cost of utilities	150		$ 100
Payments on approval of product prototype concepts and designs	$ 150
Purchase obligation		13,900
Exer Rest Units [Member]
Purchase obligation, due in next twelve months		2,600
Purchase obligation, due in second year		4,100
Purchase obligation, due in third year		8,800
Sing Lin [Member]
Payments to suppliers		1,700
Payables to customers		$ 41