Revenue Recognition (Tables)

12 Months Ended

Jul. 31, 2020

Revenue from Contract with Customer [Abstract]

Schedule of segment revenue and revenue percentage

	Year ended July 31, 2020					Year ended July 31, 2019					Year ended July 31, 2018
Revenue category	Revenue		%			Revenue		%			Revenue		%
Third-party payers	$	24,893		52		$	26,653		52		$	41,370		58
Medicare		10,825		23			10,898		21			12,111		17
HMO’s		5,983		12			6,213		12			11,359		16
Patient self-pay		6,263		13			7,351		15			6,237		9
Total	$	47,964		100	%	$	51,115		100	%	$	71,077		100	%

Schedule of product revenue by geographical

	2020		2019		2018
United States	$	14,580	$	16,966	$	16,220
Europe		7,484		8,551		9,050
Rest of the world		4,497		4,538		4,666
Products revenue	$	26,561	$	30,055	$	29,936