12. EMPLOYEE BENEFIT PLANS (Details Narrative) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Employee Benefit and Share-based Payment Arrangement, Noncash Expense [Abstract]
Contributions to ESOP	$ 60	$ 60	$ 60
Shares contributed to the ESOP during fiscal year (in thousands)	36	34	23