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Commitments and Contingencies - Additional Information (Detail) (USD $) | 12 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Contingencies And Commitments [Line Items] |  |
Rental expenses for leased properties | $ 70,500 us-gaap_LeaseAndRentalExpense | $ 70,500 us-gaap_LeaseAndRentalExpense
Longview, Texas office building |  |
Contingencies And Commitments [Line Items] |  |
Operating lease expiration, date | Apr. 30, 2018 |
Humble, Texas office building |  |
Contingencies And Commitments [Line Items] |  |
Operating lease expiration, date | Dec. 31, 2016 |

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- Details
Name: | frd_ContingenciesAndCommitmentsLineItems
Namespace Prefix: | frd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Date which lease or group of leases is set to expire, in CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_LeaseExpirationDate1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_DebtInstrumentAxis=frd_LeaseOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=frd_LeaseTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |