XML 41 R24.htm IDEA: XBRL DOCUMENT v2.4.0.6

Costs, Estimated Earnings and Billings on Uncompleted Contracts (Tables)

6 Months Ended

Jul. 31, 2012

Costs, Estimated Earnings and Billings on Uncompleted Contracts [Abstract]

Aggregate amounts of costs incurred and earnings accrued on uncompleted contracts compared with billings for contracts

		July 31, 2012				January 31, 2012
Costs incurred on uncompleted contracts		$	223,829,000			$	106,379,000
Estimated accrued earnings			32,815,000				12,121,000
			256,644,000				118,500,000
Less - Billings to date			332,133,000				183,723,000
Billings in excess of costs and estimated earnings on uncompleted contracts, net		$	75,489,000			$	65,223,000
Costs and estimated earnings in excess of billings		$	4,790,000			$	2,781,000
Billings in excess of costs and estimated earnings			80,279,000				68,004,000
Billings in excess of costs and estimated earnings on uncompleted contracts, net		$	75,489,000			$	65,223,000

X

- Definition

Schedule of contracts.

+ References

No definition available.

+ Details

Name:	agx_ScheduleOfContractsTableTextBlock
Namespace Prefix:	agx_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ContractorsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration