Summary of Significant Accounting Policies and Basis of Presentation (Details) $ in Thousands	6 Months Ended
Jun. 30, 2019 USD ($)
Accounting Policies [Abstract]
Balance beginning, Deferred revenue	$ 583
Change in deferred revenue	(59)
Balance ending, Deferred revenue	$ 524

Amount of deferred revenue recognized for transactions arising during the current reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an Entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

No definition available.

Name:	cuen_DeferredRevenueAddition
Namespace Prefix:	cuen_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration