Revenue Recognition (Tables)

12 Months Ended

Jul. 31, 2021

Revenue from Contract with Customer [Abstract]

Schedule of clinical services net revenues and percentages

	Year ended July 31, 2021					Year ended July 31, 2020					Year ended July 31, 2019
Revenue category	Revenue		%			Revenue		%			Revenue		%
Third-party payers	$	52,564		60		$	24,893		52		$	26,653		52
Medicare		13,084		15			10,825		23			10,898		21
HMO’s		11,878		14			5,983		12			6,213		12
Patient self-pay		9,458		11			6,263		13			7,351		15
Total	$	86,984		100	%	$	47,964		100	%	$	51,115		100	%

Schedule of product revenue by geography

	2021		2020		2019
United States	$	15,617	$	14,824	$	16,966
Europe		10,386		7,720		8,551
Asia Pacific		4,744		4,017		4,538
Products revenue	$	30,747	$	26,561	$	30,055