v3.5.0.2

PERFORMANCE SHARES, STOCK OPTIONS, OTHER FORMS OF COMPENSATION, AND COMMON SHARE REPURCHASES (Details) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 02, 2016 | Jul. 03, 2016 | Apr. 03, 2016 | Sep. 27, 2015 | Oct. 02, 2016 | Sep. 27, 2015 | Jan. 03, 2016
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of Shares Available for Grant | 103,800 |  |  |  | 103,800 |  |
Allocated Share-based Compensation Expense | $ 172,000 |  |  | $ (24,000) | $ 254,000 | $ 298,000 |
Board of Directors' Compensation [Abstract] |  |  |  |  |  |  |
Board of Director Cash Compensation | 30,000 |  |  | 35,000 | 65,000 | 188,000 |
Total Boardof Directors Compensation | $ 70,000 |  |  | $ (29,000) | $ 179,000 | 285,000 |
Options Outstanding Rollforward [Abstract] |  |  |  |  |  |  |
Outstanding options (in shares) | 636,000 | 684,000 | 507,000 |  | 636,000 |  | 507,000
Outstanding Weighted Average Price | $ 10 | $ 10.65 | $ 13.945 |  | $ 10 |  | $ 16.66
Options granted | 46,000 | 206,000 | 53,000 |  |  |  |
Granted Weighted Average Exercise Price | $ 5.82 | $ 5.6 | $ 17.658 |  |  |  |
Options Forfeited | 78,000 | 3,000 | 53,000 |  |  |  |
Average Price of Shares Forfeited | $ 12.17 | $ 28.53 | $ 32.024 |  | $ 12.17 |  | $ 32.024
Exercise of stock options (in shares) | 6,000 |  |  |  |  |  |
Exercised Weighted Average Exercise Price | $ 5.9 |  |  | $ 0 |  |  |
Options canceled or expired (in shares) | 10,000 | 26,000 |  |  |  |  |
Canceled or Expired Weighted Average Exercise Price | $ 31.05 | $ 32.05 |  |  |  |  |
Options Outstanding Weighted Average Remaining Contractual Term | 6 years 3 months 18 days | 5 years 10 months 24 days | 5 years 2 months 5 days |  |  |  | 5 years 3 months 18 days
Options Exercisable | 242,000 |  |  |  | 242,000 |  |
Exercisable Weighted Average Exercise Price | $ 11.4 |  |  |  | $ 11.4 |  |
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value |  |  |  |  | $ 2.16 |  | $ 4.9
Fair Value Assumptions Expected Term |  |  |  |  | 5 years 8 months 12 days |  | 3 years 3 months 18 days
Expected stock volatility |  |  |  |  | 41.30% |  | 51.20%
Risk-free interest rate |  |  |  |  | 1.30% |  | 1.90%
Performance Shares and Performance Stock Units [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Allocated Share-based Compensation Expense |  |  |  | $ (24,000) |  | 12,000 |
Stock Option [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Allocated Share-based Compensation Expense | $ 157,000 |  |  | (15,000) | $ 209,000 | 241,000 |
Value Sharebased Compensation Forfeited |  |  |  |  | (126,000) |  |
Restricted Stock And Restricted Stock Units [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Allocated Share-based Compensation Expense | 15,000 |  |  | 15,000 | 45,000 | $ 45,000 |
Director [Member] |  |  |  |  |  |  |
Options Outstanding Rollforward [Abstract] |  |  |  |  |  |  |
Options Forfeited |  |  |  |  |  | 20,000 |
Director1 [Member] |  |  |  |  |  |  |
Options Outstanding Rollforward [Abstract] |  |  |  |  |  |  |
Options Forfeited |  |  |  |  |  | 20,000 |
Director Program [Member] | Stock Option [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Allocated Share-based Compensation Expense |  |  |  | (79,000) | 69,000 | $ 52,000 |
Director Program [Member] | Restricted Stock And Restricted Stock Units [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Allocated Share-based Compensation Expense |  |  |  | $ 15,000 | $ 45,000 | $ 45,000 |
Two Thousand Five Stock Option Plan [Member] | Stock Option [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Allocated Share-based Compensation Expense | 25,000 |  |  |  |  |  |
Two Thousand Five Stock Option Plan [Member] | Restricted Stock And Restricted Stock Units [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Allocated Share-based Compensation Expense | $ 15,000 |  |  |  |  |  |
Two Thousand Five Stock Option Plan [Member] | CEO Employment [Member] |  |  |  |  |  |  |
Options Outstanding Rollforward [Abstract] |  |  |  |  |  |  |
Options granted |  |  |  |  |  | 75,000 |
Options Forfeited |  |  |  |  | 75,000 | 20,000 |
Options canceled or expired (in shares) |  |  |  |  | 25,000 |  |
Two Thousand Five Stock Option Plan [Member] | CFO Employment [Member] |  |  |  |  |  |  |
Options Outstanding Rollforward [Abstract] |  |  |  |  |  |  |
Options Forfeited |  |  |  |  | 78,000 |  |
Two Thousand Five Stock Option Plan [Member] | Director2 [Member] |  |  |  |  |  |  |
Options Outstanding Rollforward [Abstract] |  |  |  |  |  |  |
Options granted |  |  |  |  | 20,000 | 20,000 |
Two Thousand Five Stock Option Plan [Member] | Director3 [Member] |  |  |  |  |  |  |
Options Outstanding Rollforward [Abstract] |  |  |  |  |  |  |
Options granted |  |  |  |  | 20,000 | 20,000 |
Two Thousand Fifteen Stock Option Plan [Member] | CEO1 Employment [Member] |  |  |  |  |  |  |
Options Outstanding Rollforward [Abstract] |  |  |  |  |  |  |
Options granted |  |  |  |  | 50,000 |  |
Two Thousand Fifteen Stock Option Plan [Member] | CFO Employment [Member] |  |  |  |  |  |  |
Options Outstanding Rollforward [Abstract] |  |  |  |  |  |  |
Options granted |  |  |  |  | 6,000 |  |
Two Thousand Fifteen Stock Option Plan [Member] | CFO1 Employment [Member] |  |  |  |  |  |  |
Options Outstanding Rollforward [Abstract] |  |  |  |  |  |  |
Options granted |  |  |  |  | 70,000 |  |
Two Thousand Fifteen Stock Option Plan [Member] | COO Employment [Member] |  |  |  |  |  |  |
Options Outstanding Rollforward [Abstract] |  |  |  |  |  |  |
Options granted |  |  |  |  |  | 71,324 |
Two Thousand Fifteen Stock Option Plan [Member] | CMO Employment [Member] |  |  |  |  |  |  |
Options Outstanding Rollforward [Abstract] |  |  |  |  |  |  |
Options granted |  |  |  |  | 35,000 |  |

X
- References No definition available. + Details
Name: | fda_AveragePriceOfSharesForfeited
Namespace Prefix: | fda_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition FDA custom tag for Board of Direct Cash Compensation + References No definition available. + Details
Name: | fda_BoardOfDirectorCashCompensation
Namespace Prefix: | fda_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | fda_BoardOfDirectorsCompensationAbstract
Namespace Prefix: | fda_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | fda_OptionsOutstandingRollforwardAbstract
Namespace Prefix: | fda_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total Board of Directors Compensation + References No definition available. + Details
Name: | fda_TotalBoardofDirectorsCompensation
Namespace Prefix: | fda_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssumptionsExpectedTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Risk-free interest rate assumption used in valuing an instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssumptionsRiskFreeInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average expected volatility of stock price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average price of options that were either forfeited or expired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Value of forfeitures of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph c(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationForfeited
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of share options (or share units) exercised during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28,29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=fda_PerformanceSharesAndPerformanceStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_StockOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=fda_RestrictedStockAndRestrictedStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_DirectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=fda_Director1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=fda_DirectorProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=fda_TwoThousandFiveStockOptionPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=fda_CeoEmploymentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=fda_CfoEmploymentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=fda_Director2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=fda_Director3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=fda_TwoThousandFifteenStockOptionPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=fda_Ceo1EmploymentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=fda_Cfo1EmploymentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=fda_CooEmploymentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=fda_CmoEmploymentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |