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