Note 5 - Premises and Equipment - Schedule of Capital Lease in Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Finance lease	$ 3,423	$ 3,423
Less: accumulated amortization	2,567	2,395
Capital Lease in Premises and Equipment, Net	$ 856	$ 1,028

Represents Accumulated Depreciation, Depletion and Amortization, Capital Lease in Premises and Equipment.

No definition available.

Name:	cnob_AccumulatedDepreciationDepletionAndAmortizationCapitalLeaseInPremisesAndEquipment
Namespace Prefix:	cnob_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant