Stock Repurchase Program (Total Repurchase Transactions) (Details) - shares	12 Months Ended
Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Stock Repurchase Program [Abstract]
Open market repurchase transactions			165,000
Private repurchase transactions		250	4,000
Total repurchase transactions		250	169,000

Treasury Stock Shares Acquired Public Transaction and Private Transaction

No definition available.

Name:	fhco_TreasuryStockSharesAcquiredPublicTransactionAndPrivateTransaction
Namespace Prefix:	fhco_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration