NET INCOME PER SHARE ATTRIBUTABLE TO THE STOCKHOLDERS OF ARGAN (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2023	Jul. 31, 2022
NET INCOME PER SHARE
Net income	$ 12,767	$ 4,222	$ 14,876	$ 11,707
Weighted average number of shares outstanding - basic	13,403	14,134	13,408	14,516
Effects of stock awards	139	113	136	100
Weighted average number of shares outstanding - diluted	13,542	14,247	13,544	14,616
Basic (in dollars per share)	$ 0.95	$ 0.30	$ 1.11	$ 0.81
Diluted (in dollars per share)	$ 0.94	$ 0.30	$ 1.10	$ 0.80