Revenue Recognition (Tables)

3 Months Ended

Oct. 31, 2019

Revenue from Contract with Customer [Abstract]

Schedule Of Segment Revenue And Revenue Percentage [Table Text Block]

The following table represents clinical services net revenues and percentages by type of customer:

	Three months ended October 31, 2019				Three months ended October 31, 2018
Revenue category
Third-party payer	$	6,392	50	%	$	7,907	55	%
Medicare		3,153	25			1,974	14
Patient self-pay		1,519	12			2,751	19
HMO’s		1,716	13			1,665	12
Total	$	12,780	100	%	$	14,297	100	%

Schedule of Product Revenue By Geographical [Table Text Block]

Products revenue by geography is as follows:

	Three Months Ended October 31,
	2019		2018
United States	$	4,447	$	3,879
Europe		1,865		2,035
Rest of the world		1,115		1,049
Total	$	7,427	$	6,963