XML 71 R61.htm IDEA: XBRL DOCUMENT v3.8.0.1

Note 14 - Guarantees, Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Credit Losses Associated With Derivative Contracts	$ 0	$ 0
Securities Committed to Purchase Amount	0		$ 0
Securities Committed to Sell Amount	0		0
Self Insurance Reserve	$ 200		$ 200

X

- Definition

Credit losses associated with derivative contracts.

+ References

No definition available.

+ Details

Name:	fusb_CreditLossesAssociatedWithDerivativeContracts
Namespace Prefix:	fusb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Securities committed to purchase amount.

+ References

No definition available.

+ Details

Name:	fusb_SecuritiesCommittedToPurchaseAmount
Namespace Prefix:	fusb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Securities committed to sell amount.

+ References

No definition available.

+ Details

Name:	fusb_SecuritiesCommittedToSellAmount
Namespace Prefix:	fusb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.24)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_SelfInsuranceReserve
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant