CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS
REVENUES	$ 58,406	$ 116,459	$ 171,009	$ 394,495
Cost of revenues	52,414	86,927	183,078	318,803
GROSS PROFIT (LOSS) (Note 2)	5,992	29,532	(12,069)	75,692
Selling, general and administrative expenses	12,135	11,147	31,761	31,162
Impairment loss (Note 5)			2,072
(LOSS) INCOME FROM OPERATIONS	(6,143)	18,385	(45,902)	44,530
Other income, net	3,578	1,429	7,472	5,121
(LOSS) INCOME BEFORE INCOME TAXES	(2,565)	19,814	(38,430)	49,651
Income tax (expense) benefit (Note 11)	(1,996)	12,560	4,936	4,509
NET INCOME (LOSS)	(4,561)	32,374	(33,494)	54,160
Net income (loss) attributable to non-controlling interests	2,294	(60)	2,007	(83)
NET INCOME (LOSS) ATTRIBUTABLE TO THE STOCKHOLDERS OF ARGAN, INC.	(6,855)	32,434	(35,501)	54,243
Foreign currency translation adjustments	235	(1,092)	(825)	(2,364)
COMPREHENSIVE (LOSS) INCOME ATTRIBUTABLE TO THE STOCKHOLDERS OF ARGAN, INC.	$ (6,620)	$ 31,342	$ (36,326)	$ 51,879
(LOSS) INCOME PER SHARE ATTRIBUTABLE TO THE STOCKHOLDERS OF ARGAN, INC. (Note 12)
Basic (in Dollars per share)	$ (0.44)	$ 2.08	$ (2.27)	$ 3.48
Diluted (in Dollars per share)	$ (0.44)	$ 2.07	$ (2.27)	$ 3.46
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING
Basic (in shares)	15,633	15,569	15,617	15,568
Diluted (in shares)	15,633	15,702	15,617	15,685
CASH DIVIDENDS PER SHARE (Note 10)	$ 0.25	$ 0.25	$ 0.75	$ 0.75