Inventories (Details Textual) (USD $)	Sep. 30, 2012
Inventories (Textual) [Abstract]
Deferred debit reflecting difference between replacement cost and LIFO cost	$ 40,360

Deferred debit reflecting the difference between replacement cost and LIFO cost.

No definition available.

Name:	frd_DeferredDebitReflectingDifferenceBetweenReplacementCostAndLifoCost
Namespace Prefix:	frd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant