CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS
REVENUES	$ 136,670	$ 259,803	$ 278,036	$ 490,292
Cost of revenues	105,962	208,396	231,876	398,789
GROSS PROFIT	30,708	51,407	46,160	91,503
Selling, general and administrative expenses	10,378	10,799	20,015	20,289
INCOME FROM OPERATIONS	20,330	40,608	26,145	71,214
Other income, net	2,928	1,311	3,692	2,529
INCOME BEFORE INCOME TAXES	23,258	41,919	29,837	73,743
Income tax expense	6,314	14,601	8,051	25,676
NET INCOME	16,944	27,318	21,786	48,067
Net (loss) income attributable to non-controlling interests	(28)	179	(23)	303
NET INCOME ATTRIBUTABLE TO THE STOCKHOLDERS OF ARGAN, INC.	16,972	27,139	21,809	47,764
Foreign currency translation adjustments	(693)	789	(1,272)	893
COMPREHENSIVE INCOME ATTRIBUTABLE TO THE STOCKHOLDERS OF ARGAN, INC.	$ 16,279	$ 27,928	$ 20,537	$ 48,657
EARNINGS PER SHARE ATTRIBUTABLE TO THE STOCKHOLDERS OF ARGAN, INC.
Basic (in Dollars per share)	$ 1.09	$ 1.75	$ 1.40	$ 3.08
Diluted (in Dollars per share)	$ 1.08	$ 1.72	$ 1.39	$ 3.03
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING
Basic (in shares)	15,568	15,514	15,568	15,491
Diluted (in shares)	15,673	15,787	15,673	15,788
CASH DIVIDENDS PER SHARE (Note 11)	$ 0.25		$ 0.50