Revenue Recognition (Details) - Schedule of Product Revenue By Geographical - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Revenue Recognition (Details) - Schedule of Product Revenue By Geographical [Line Items]
Products revenue	$ 6,417	$ 7,911	$ 20,715	$ 22,201
United States [Member]
Revenue Recognition (Details) - Schedule of Product Revenue By Geographical [Line Items]
Products revenue	3,458	4,585	11,652	12,571
Europe [Member]
Revenue Recognition (Details) - Schedule of Product Revenue By Geographical [Line Items]
Products revenue	1,793	2,297	5,740	6,347
Rest of the world [Member]
Revenue Recognition (Details) - Schedule of Product Revenue By Geographical [Line Items]
Products revenue	$ 1,166	$ 1,029	$ 3,323	$ 3,283