Condensed Consolidated Statements of Changes in Stockholders’ Equity (Unaudited) - USD ($) $ in Thousands	Class A Common Stock	Class B Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Treasury Stock	Total
Balance at Jul. 31, 2020	$ 5	$ 118	$ 25,725	$ (1,085)	$ (15,802)	$ (76)	$ 8,885
Balance (in Shares) at Jul. 31, 2020	525,000	11,788,000
Stock-based compensation			237				237
Stock-based compensation (in Shares)		39,000
Purchase of treasury stock						(26)	(26)
Foreign currency translation adjustment				(159)			(159)
Net income					1,045		1,045
Balance at Oct. 31, 2020	$ 5	$ 118	25,962	(1,244)	(14,757)	(102)	9,982
Balance (in Shares) at Oct. 31, 2020	525,000	11,827,000
Exercise of stock options		$ 3	393				396
Exercise of stock options (in Shares)		312,000
Stock-based compensation			113				113
Stock-based compensation (in Shares)		8,000
Stock issued for matching contributions to the 401(k) Plan			39				39
Stock issued for matching contributions to the 401(k) Plan (in Shares)		7,000
Proceeds from sales of Class B Common Stock		$ 8	4,777				4,785
Proceeds from sales of Class B Common Stock (in Shares)		762,000
Foreign currency translation adjustment				365			365
Net income					2,278		2,278
Balance at Jan. 31, 2021	$ 5	$ 129	31,284	(879)	(12,479)	(102)	17,958
Balance (in Shares) at Jan. 31, 2021	525,000	12,916,000
Balance at Jul. 31, 2021	$ 5	$ 139	41,664	(997)	(7,554)	(102)	33,155
Balance (in Shares) at Jul. 31, 2021	525,000	13,923,000
Stock-based compensation			319				319
Stock-based compensation (in Shares)		12,000
Purchase of treasury stock						(232)	(232)
Foreign currency translation adjustment				142			142
Net income					2,055		2,055
Balance at Oct. 31, 2021	$ 5	$ 139	41,983	(855)	(5,499)	(334)	35,439
Balance (in Shares) at Oct. 31, 2021	525,000	13,935,000
Exercise of stock options			7				7
Exercise of stock options (in Shares)		3,000
Stock-based compensation			446				446
Stock-based compensation (in Shares)		6,000
Stock issued for matching contributions to the 401(k) Plan			43				43
Stock issued for matching contributions to the 401(k) Plan (in Shares)		5,000
Foreign currency translation adjustment				(222)			(222)
Net income					2,325		2,325
Balance at Jan. 31, 2022	$ 5	$ 139	$ 42,479	$ (1,077)	$ (3,174)	$ (334)	$ 38,038
Balance (in Shares) at Jan. 31, 2022	525,000	13,949,000