CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS
REVENUES	$ 127,331	$ 58,406	$ 274,971	$ 171,009
Cost of revenues	106,988	52,414	234,989	183,078
GROSS PROFIT (LOSS) (Note 2)	20,343	5,992	39,982	(12,069)
Selling, general and administrative expenses	9,398	12,135	28,827	31,761
Impairment loss				2,072
INCOME (LOSS) FROM OPERATIONS	10,945	(6,143)	11,155	(45,902)
Other income, net	175	3,578	1,714	7,472
INCOME (LOSS) BEFORE INCOME TAXES	11,120	(2,565)	12,869	(38,430)
Income tax (expense) benefit (Note 10)	(1,666)	(1,996)	1,391	4,936
NET INCOME (LOSS)	9,454	(4,561)	14,260	(33,494)
Net income (loss) attributable to non-controlling interests		2,294	(40)	2,007
NET INCOME (LOSS) ATTRIBUTABLE TO THE STOCKHOLDERS OF ARGAN, INC.	9,454	(6,855)	14,300	(35,501)
Foreign currency translation adjustments	(321)	235	(650)	(825)
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO THE STOCKHOLDERS OF ARGAN, INC.	$ 9,133	$ (6,620)	$ 13,650	$ (36,326)
NET INCOME (LOSS) PER SHARE ATTRIBUTABLE TO THE STOCKHOLDERS OF ARGAN, INC. (Note 11)
Basic (in Dollars per share)	$ 0.60	$ (0.44)	$ 0.91	$ (2.27)
Diluted (in Dollars per share)	$ 0.60	$ (0.44)	$ 0.91	$ (2.27)
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING
Basic (in shares)	15,680	15,633	15,659	15,617
Diluted (in shares)	15,833	15,633	15,795	15,617
CASH DIVIDENDS PER SHARE (Note 12)	$ 0.25	$ 0.25	$ 1.75	$ 0.75