STOCK-BASED COMPENSATION (Details Narrative) - USD ($)	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Total intrinsic values of options exercised	$ 17,088,000	$ 12,542,000	$ 152,000
Stock based compensation expenses	$ 120,000	$ 83,000	$ 0
Option exercisable shares (in thousands)	620,000	1,042,000	2,045,000
Weighted average exercise price for options exercisable	$ 2.56	$ 2.22	$ 2.26
Stock Option, RSUs and PRSUs
Stock-based compensation expense related to stock options and RSUs	$ 1,988,000	$ 2,071,000	$ 993,000
RSUs cancelled (in thousands)	0
2016 Equity Incentive Plan
Unrecognized stock-based compensation	$ 3,102,000
Common stock reserved for issuance	4,848,000
Remained available for issuance	2,248,000
Estimated forfeitures of unvested stock based awards, amount	$ 8,000
Weighted average period for recognition of costs	2 years 3 months 18 days
Employee Stock Purchase Plan
Common stock reserved for issuance	2,550,000
Purchase rights under the ESPP	$ 715,000
Weighted average period for recognition of costs	1 year 1 month 6 days
Stock-based compensation related to the ESPP	$ 760,000	935,000	108,000
Maximum calendar year contribution per employee	$ 25,000	$ 25,000	$ 25,000
Maximum number of shares a participant may purchase (in thousands)	3,000	3,000	3,000
ESPP purchase right granted (in thousands)	77,000	101,000	279,000
ESPP shares issued (in thousands)	211,000	178,000	147,000
Total shares issued under ESPP plan (in thousands)	2,152,000
ESPP Shares available for issuance (in thousands)	398,000
Number of authorized shares increased	350,000