XML 64 R53.htm IDEA: XBRL DOCUMENT
v3.24.1.1.u2

Note 7 - Stock Plans - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Stock-based compensation expense | $ 459 | $ 445
The 2012 Director Stock Incentive Plan [Member] |  |
Stock-based compensation expense | 79 | 114
The 2012 Omnibus Stock Incentive Plan [Member] |  |
Stock-based compensation expense | 88 | 141
The 2022 Omnibus Stock Incentive Plan [Member] |  |
Stock-based compensation expense | 166 | 156
The 2002 Employee Stock Purchase Plan [Member] |  |
Stock-based compensation expense | $ 126 | $ 34

X
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_PlanNameAxis=fdbc_The2012DirectorStockIncentivePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=fdbc_The2012OmnibusStockIncentivePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=fdbc_The2022OmnibusStockIncentivePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=fdbc_The2002EmployeeStockPurchasePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |