Condensed Consolidated Statements of Operations (USD $)	3 Months Ended		6 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Revenues	$ 102,030,000	$ 57,864,000	$ 153,221,000	$ 104,512,000
COST OF REVENUES
Cost of revenues	80,466,000	36,607,000	121,607,000	70,227,000
GROSS PROFIT	21,564,000	21,257,000	31,614,000	34,285,000
Selling, general and administrative expenses	4,481,000	1,601,000	7,859,000	5,044,000
Income from operations	17,083,000	19,656,000	23,755,000	29,241,000
Gains on the deconsolidation of variable interest entities	0	1,324,000	0	2,444,000
Other income, net	41,000	410,000	63,000	566,000
INCOME BEFORE INCOME TAXES	17,124,000	21,390,000	23,818,000	32,251,000
Income tax expense	5,104,000	7,467,000	6,997,000	11,388,000
NET INCOME	12,020,000	13,923,000	16,821,000	20,863,000
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	3,470,000	1,300,000	4,796,000	1,830,000
NET INCOME ATTRIBUTABLE TO THE STOCKHOLDERS OF ARGAN, INC.	8,550,000	12,623,000	12,025,000	19,033,000
EARNINGS PER SHARE ATTRIBUTABLE TO THE STOCKHOLDERS OF ARGAN, INC.
Basic	$ 0.59	$ 0.90	$ 0.84	$ 1.36
Diluted	$ 0.58	$ 0.89	$ 0.82	$ 1.35
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING
Basic	14,399,000	13,997,000	14,350,000	13,986,000
Diluted	14,655,000	14,129,000	14,641,000	14,132,000
Power Industry Services [Member]
Revenues	100,418,000	55,520,000	150,242,000	99,289,000
COST OF REVENUES
Cost of revenues	79,261,000	34,804,000	119,311,000	66,050,000
Telecommunications Infrastructure Services [Member]
Revenues	1,612,000	2,344,000	2,979,000	5,223,000
COST OF REVENUES
Cost of revenues	$ 1,205,000	$ 1,803,000	$ 2,296,000	$ 4,177,000