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, 2019	$ 5	$ 99	$ 23,131	$ (985)	$ (15,243)	$ (47)	$ 6,960
Balance (in Shares) at Jul. 31, 2019	525	9,876
Balance at Oct. 31, 2019	$ 5	$ 99	23,229	(1,128)	(16,044)	(69)	6,092
Balance (in Shares) at Oct. 31, 2019	525	9,876
Stock-based compensation			98				98
Purchase of treasury stock						(22)	(22)
Foreign currency translation adjustment				(143)			(143)
Net Income (loss)					(801)		(801)
Balance at Jul. 31, 2019	$ 5	$ 99	23,131	(985)	(15,243)	(47)	6,960
Balance (in Shares) at Jul. 31, 2019	525	9,876
Balance at Apr. 30, 2020	$ 5	$ 117	25,624	(1,469)	(16,269)	(76)	7,932
Balance (in Shares) at Apr. 30, 2020	525	11,715
Balance at Oct. 31, 2019	$ 5	$ 99	23,229	(1,128)	(16,044)	(69)	6,092
Balance (in Shares) at Oct. 31, 2019	525	9,876
Balance at Jan. 31, 2020	$ 5	$ 100	23,705	(1,136)	(15,944)	(76)	6,654
Balance (in Shares) at Jan. 31, 2020	525	9,980
Exercise of stock options			4				4
Exercise of stock options (in Shares)		30
Stock-based compensation		$ 1	156				157
Stock-based compensation (in Shares)		48
Stock issued for matching contributions to the 401(k) Plan			41				41
Stock issued for matching contributions to the 401(k) Plan (in Shares)		26
Proceeds from sales of Class B Common Stock			275				275
Purchase of treasury stock						(7)	(7)
Foreign currency translation adjustment				(8)			(8)
Net Income (loss)					100		100
Balance at Apr. 30, 2020	$ 5	$ 117	25,624	(1,469)	(16,269)	(76)	7,932
Balance (in Shares) at Apr. 30, 2020	525	11,715
Tied out to balance sheet-April 30, 2020	$ 5	$ 117	25,624	(1,469)	(16,269)	(76)	7,932
Net proceeds from sales of Class B Common Stock		$ 17	1,817				1,834
Net proceeds from sales of Class B Common Stock (in Shares)		1,735
Stock-based compensation			102				102
Foreign currency translation adjustment				(333)			(333)
Net Income (loss)					(325)		(325)
Balance at Jul. 31, 2020	$ 5	$ 118	25,725	(1,085)	(15,802)	(76)	8,885
Balance (in Shares) at Jul. 31, 2020	525	11,788
Balance at Oct. 31, 2020	$ 5	$ 118	25,962	(1,244)	(14,757)	(102)	9,982
Balance (in Shares) at Oct. 31, 2020	525	11,827
Stock-based compensation			237				237
Stock-based compensation (in Shares)		39
Purchase of treasury stock						(26)	(26)
Foreign currency translation adjustment				(159)			(159)
Net Income (loss)					1,045		1,045
Balance at Jul. 31, 2020	$ 5	$ 118	25,725	(1,085)	(15,802)	(76)	8,885
Balance (in Shares) at Jul. 31, 2020	525	11,788
Balance at Apr. 30, 2021	$ 5	$ 137	38,899	(750)	(10,547)	(102)	27,642
Balance (in Shares) at Apr. 30, 2021	525	13,683
Balance at Oct. 31, 2020	$ 5	$ 118	25,962	(1,244)	(14,757)	(102)	9,982
Balance (in Shares) at Oct. 31, 2020	525	11,827
Balance at Jan. 31, 2021	$ 5	$ 129	31,284	(879)	(12,479)	(102)	17,958
Balance (in Shares) at Jan. 31, 2021	525	12,916
Exercise of stock options		$ 3	393				396
Exercise of stock options (in Shares)		312
Stock-based compensation			113				113
Stock-based compensation (in Shares)		8
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
Proceeds from sales of Class B Common Stock		$ 8	4,777				4,785
Proceeds from sales of Class B Common Stock (in Shares)		762
Foreign currency translation adjustment				365			365
Net Income (loss)					2,278		2,278
Balance at Apr. 30, 2021	$ 5	$ 137	38,899	(750)	(10,547)	(102)	27,642
Balance (in Shares) at Apr. 30, 2021	525	13,683
Exercise of stock options		$ 2	421				423
Exercise of stock options (in Shares)		185
Stock-based compensation		$ 1	98				99
Stock-based compensation (in Shares)		93
Proceeds from sales of Class B Common Stock		$ 5	7,096				7,101
Proceeds from sales of Class B Common Stock (in Shares)		489
Foreign currency translation adjustment				129			129
Net Income (loss)					$ 1,932		$ 1,932