Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($)	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Income Statement [Abstract]
Net sales	$ 1,668,444	$ 1,094,967	$ 5,205,641	$ 3,222,846
Cost of revenue	837,254	491,346	2,804,694	1,752,116
Gross profit	831,190	603,621	2,400,947	1,470,730
Operating expenses
General, administration and sales	3,313,918	1,011,414	8,492,150	2,785,816
Transaction costs	0	0	125,167	0
Research and development	21,732	23,908	57,062	32,371
Total operating expenses	3,335,650	1,035,322	8,674,379	2,818,187
Operating loss	(2,504,460)	(431,701)	(6,273,432)	(1,347,457)
Bargain purchase gain (adjustment)	(2,277)	0	1,187,235	0
Other income (expense), net	85,303	187,218	45,923	196,941
Loss before income taxes	(2,421,434)	(244,483)	(5,040,274)	(1,150,516)
Income tax provision (benefit) from continuing operations	(1,637)	(4,206)	(404,667)	(12,035)
Net loss from continuing operations	(2,419,797)	(240,277)	(4,635,607)	(1,138,481)
Income from discontinued operations, net of tax	0	109,107	0	5,695,137
Net income (loss)	$ (2,419,797)	$ (131,170)	$ (4,635,607)	$ 4,556,656
Net loss per common share from continuing operations, basic	$ (0.64)	$ (0.06)	$ (1.23)	$ (0.29)
Weighted average number of common shares, basic	3,764,536	3,858,287	3,759,639	3,992,664
Net loss per common share from continuing operations, diluted	$ (0.64)	$ (0.06)	$ (1.23)	$ (0.29)
Weighted average number of common shares, diluted	3,764,536	3,858,287	3,759,639	3,992,664
Net income per common share from discontinued operations, basic	$ .00	$ 0.03	$ .00	$ 1.43
Weighted average number of common shares, basic	3,764,536	3,858,287	3,759,639	3,992,664
Net income per common share from discontinued operations, diluted	$ 0.00	$ 0.03	$ 0.00	$ 1.43
Weighted average number of common shares, diluted	3,764,536	3,858,287	3,759,639	3,992,664
Net income (loss) per common share, basic	$ (0.64)	$ (0.03)	$ (1.23)	$ 1.14
Weighted average number of common shares, basic	3,764,536	3,858,287	3,759,639	3,992,664
Net income (loss) per common share, diluted	$ (0.64)	$ (0.03)	$ (1.23)	$ 1.14
Weighted average number of common shares, diluted	3,764,536	3,858,287	3,759,639	3,992,664
Comprehensive income (loss)
Net income (loss)	$ (2,419,797)	$ (131,170)	$ (4,635,607)	$ 4,556,656
Foreign currency translation adjustment	0	0	0	527,827
Total comprehensive income	$ (2,419,797)	$ (131,170)	$ (4,635,607)	$ 5,084,483