Revenue Recognition (Tables)

9 Months Ended

Apr. 30, 2022

Revenue Recognition [Abstract]

Schedule of net revenues and percentages by type of customer

	Three months ended April 30, 2022				Three months ended April 30, 2021
Revenue category
Third-party payer	$	10,817	58	%	$	16,135	64	%
Medicare		2,436	13			2,952	12
Patient self-pay		2,177	12			2,468	10
HMOs		3,200	17			3,463	14
Total	$	18,360	100	%	$	25,018	100	%

	Nine months ended April 30, 2022				Nine months ended April 30, 2021
Revenue category
Third-party payer	$	36,962	60	%	$	44,138	63	%
Medicare		7,949	13			10,265	15
Patient self-pay		6,727	11			6,524	9
HMOs		10,407	16			9,302	13
Total	$	62,045	100	%	$	70,229	100	%

Schedule of products revenue by geography

	Three Months Ended April 30				Nine Months Ended April 30
	2022		2021		2022		2021
United States	$	4,422	$	3,941	$	15,039	$	11,410
Europe		2,169		2,732		6,576		7,798
Asia Pacific		1,001		1,106		3,127		3,481
Products revenue	$	7,592	$	7,779	$	24,742	$	22,689