Revenue Recognition (Tables)

9 Months Ended

Apr. 30, 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 April 30, 2019				Three months ended April 30, 2018
Revenue category
Third-party payer	$	5,799	50	%	$	9,965	56	%
Medicare		2,634	22			2,858	16
Patient self-pay		1,881	16			2,047	12
HMO’s		1,437	12			2,867	16
Total	$	11,751	100	%	$	17,737	100	%

	Nine months ended April 30, 2019				Nine months ended April 30, 2018
Revenue category
Third-party payer	$	20,213	53	%	$	32,726	59	%
Medicare		7,724	20			9,073	16
Patient self-pay		5,652	15			5,689	10
HMO’s		4,459	12			8,513	15
Total	$	38,048	100	%	$	56,001	100	%

Schedule of Segment Revenue By Geographical [Table Text Block]

Products revenue by geography is as follows:

	Three Months Ended April 30				Nine Months Ended April 30
	2019		2018		2019		2018
United States	$	4,585	$	3,987	$	12,570	$	11,500
Europe		1,620		1,529		4,370		4,422
Rest of the world		1,706		1,899		5,261		5,578
Total	$	7,911	$	7,415	$	22,201	$	21,500