|
Earnings (Loss) Per Share Attributable to the Stockholders of Argan (Details) (USD $)
|
3 Months Ended | |
|---|---|---|
|
Apr. 30, 2013
|
Apr. 30, 2012
|
|
| Earnings (Loss) Per Share Attributable to the Stockholders of Argan, Inc (Textual) [Abstract] | ||
| Additional shares included in the calculation of diluted EPS | 151,000 | |
| Additional shares included in the calculation of diluted EPS | 282,000 | |
| Shares covered by antidilutive stock options | 240,000 | 388,000 |
| Income (Loss) from Continuing Operations Attributable to Parent | $ 6,410,000 | $ 4,723,000 |