CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS
REVENUES	$ 87,492	$ 63,059	$ 147,640	$ 112,603
Cost of revenues	71,862	60,094	128,001	130,664
GROSS PROFIT (LOSS) (Note 2)	15,630	2,965	19,639	(18,061)
Selling, general and administrative expenses	9,085	10,038	19,429	19,626
Impairment loss				2,072
INCOME (LOSS) FROM OPERATIONS	6,545	(7,073)	210	(39,759)
Other income, net	451	1,642	1,539	3,894
INCOME (LOSS) BEFORE INCOME TAXES	6,996	(5,431)	1,749	(35,865)
Income tax (expense) benefit (Note 10)	(1,397)	6,411	3,057	6,932
NET INCOME (LOSS)	5,599	980	4,806	(28,933)
Net loss attributable to non-controlling interests	(10)	(174)	(40)	(287)
NET INCOME (LOSS) ATTRIBUTABLE TO THE STOCKHOLDERS OF ARGAN, INC.	5,609	1,154	4,846	(28,646)
Foreign currency translation adjustments	(83)	(6)	(329)	(1,060)
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO THE STOCKHOLDERS OF ARGAN, INC.	$ 5,526	$ 1,148	$ 4,517	$ (29,706)
NET INCOME (LOSS) PER SHARE ATTRIBUTABLE TO THE STOCKHOLDERS OF ARGAN, INC. (Note 11)
Basic (in Dollars per share)	$ 0.36	$ 0.07	$ 0.31	$ (1.84)
Diluted (in Dollars per share)	$ 0.36	$ 0.07	$ 0.31	$ (1.84)
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING
Basic (in shares)	15,653	15,633	15,648	15,608
Diluted (in shares)	15,788	15,757	15,767	15,608
CASH DIVIDENDS PER SHARE (Note 12)	$ 1.25	$ 0.25	$ 1.50	$ 0.50