Income Taxes (Details Narrative) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016
Income tax likehood percentage description	greater than 50 percent
Deferred tax assets, valuation allowance	$ 6,179	$ 6,295
Increases in the valuation allowance	116	$ 279
Federal and State Tax Authority [Member]
Operating loss carryforwards	15,900
Federal and State Tax Authority [Member] | Stock Options [Member]
Operating loss carryforwards	2,000
Foreign Tax Authority [Member]
Operating loss carryforwards	$ 100
Minimum [Member]
Income tax examination year under examination	2013
Minimum [Member] | Federal and State Tax Authority [Member]
Income tax examination year under examination	2013
Maximum [Member]
Income tax examination year under examination	2017
Maximum [Member] | Federal and State Tax Authority [Member]
Income tax examination year under examination	2016