XML 96 R38.htm IDEA: XBRL DOCUMENT
v3.23.1

Deposits (Details Narrative) - USD ($) | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Offsetting Assets [Line Items] |  |
Deposits | $ 33,264 | $ 33,933
Lease Agreement And Utility Deposit [Member] |  |
Offsetting Assets [Line Items] |  |
Deposits | $ 33,264 | $ 39,901

X
- Definition Carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment after one year or beyond the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DepositsAssetsNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_OffsettingAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_TransactionTypeAxis=FCUV_LeaseAgreementAndUtilityDepositMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |