Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($)	3 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Income Statement [Abstract]
Net sales	$ 1,507,485	$ 1,094,778
Cost of revenue	899,841	617,423
Gross profit	607,644	477,355
Operating expenses
General, administration and sales	2,086,716	704,152
Transaction costs	125,167	0
Research and development	17,453	3,086
Total operating expenses	2,229,336	707,238
Operating (loss)	(1,621,692)	(229,883)
Bargain purchase gain	1,271,615	0
Other income (expense), net	96,069	4,344
Income (loss) before income taxes	(254,008)	(225,539)
Income tax provision (benefit) from continuing operations	(404,667)	(19,385)
Net income (loss) from continuing operations	150,659	(206,154)
Income from discontinued operations, net of tax	0	375,962
Net income	$ 150,659	$ 169,808
Net income (loss) per common share from continuing operations, basic	$ .04	$ (0.05)
Weighted average number of common shares, basic	3,763,752	4,032,878
Net income (loss) per common share from continuing operations, diluted	$ .04	$ (0.05)
Weighted average number of common shares, diluted	3,776,494	4,032,878
Net income (loss) per common share from discontinued operations, basic	$ 0	$ 0.09
Weighted average number of common shares, basic	3,763,752	4,032,878
Net income (loss)per common share from discontinued operations, diluted	$ 0	$ 0.09
Weighted average number of common shares, diluted	3,776,494	4,032,878
Net income (loss) per common share, basic	$ .04	$ 0.04
Weighted average number of common shares, basic	3,763,752	4,032,878
Net income (loss) per common share, diluted	$ .04	$ 0.04
Weighted average number of common shares, diluted	3,776,494	4,032,878
Comprehensive income
Net income	$ 150,659	$ 169,808
Foreign currency translation adjustment	0	60,348
Total comprehensive income	$ 150,659	$ 230,156