Quarterly report pursuant to Section 13 or 15(d)

Industry Segments And Financial Information About Foreign And Domestic Operations (Details)

v2.4.1.9
Industry Segments And Financial Information About Foreign And Domestic Operations (Details) (USD $)
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
segment
Mar. 31, 2014
Sep. 30, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]          
Number of reportable segments     1us-gaap_NumberOfReportableSegments    
Revenue, Net $ 10,977,467us-gaap_SalesRevenueNet $ 4,346,223us-gaap_SalesRevenueNet $ 17,636,673us-gaap_SalesRevenueNet $ 11,036,418us-gaap_SalesRevenueNet  
Long-Lived Asset 1,523,000us-gaap_NoncurrentAssets   1,523,000us-gaap_NoncurrentAssets   1,768,000us-gaap_NoncurrentAssets
Sales Less Than Five Percent [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Concentration risk, percentage     5.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= fhco_SalesLessThanFivePercentMember
   
Sales Exceeding Ten Percent [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Concentration risk, percentage     10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= fhco_SalesExceedingTenPercentMember
   
Brazil [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenue, Net     9,955,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_BR
   
Zimbabwe [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenue, Net     2,113,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_ZW
   
South Africa [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenue, Net     1,181,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_ZA
2,262,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_ZA
 
U.S. [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenue, Net       1,280,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_US
 
Long-Lived Asset 67,000us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_US
  67,000us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_US
  88,000us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_US
Angola [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenue, Net       2,476,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_AO
 
Congo [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenue, Net       658,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_CG
 
Malaysia [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Long-Lived Asset 1,325,000us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_MY
  1,325,000us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_MY
  1,528,000us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_MY
U.K. [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Long-Lived Asset 131,000us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_GB
  131,000us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_GB
  152,000us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_GB
Other Countries [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenue, Net     4,388,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= fhco_OtherCountriesMember
3,452,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= fhco_OtherCountriesMember
 
Tanzania [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenue, Net       $ 908,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_TZ
 
Customer One [Member] | Accounts Receivable [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Concentration risk, percentage     50.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= fhco_CustomerOneMember
  12.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= fhco_CustomerOneMember
Customer Two [Member] | Accounts Receivable [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Concentration risk, percentage     10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= fhco_CustomerTwoMember