Revenue Recognition (Tables)

6 Months Ended

Jan. 31, 2022

Revenue Recognition [Abstract]

Schedule of net revenues and percentages by type of customer

	Three months ended January 31, 2022				Three months ended January 31, 2021
Revenue category
Third-party payer	$	14,256	60	%	$	15,023	63	%
Medicare		2,784	12			3,910	16
Patient self-pay		2,605	11			1,997	8
HMOs		4,029	17			3,058	13
Total	$	23,674	100	%	$	23,988	100	%

	Six months ended January 31, 2022				Six months ended January 31, 2021
Revenue category
Third-party payer	$	26,145	60	%	$	27,503	61	%
Medicare		5,514	13			7,313	16
Patient self-pay		4,550	10			4,556	10
HMOs		7,206	17			5,839	13
Total	$	43,415	100	%	$	45,211	100	%

Schedule of products revenue by geography

	Three Months Ended January 31				Six Months Ended January 31
	2022		2021		2022		2021
United States	$	6,754	$	3,524	$	10,617	$	7,469
Europe		2,401		2,635		4,407		5,066
Asia Pacific		1,217		1,319		2,126		2,375
Products revenue	$	10,372	$	7,478	$	17,150	$	14,910