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1. Principal Activities and Organization (Details - VIE Income info) - GZ WFH [Member] - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenue	$ 4,812,788	$ 0
Net income (loss)	1,973,757	(218)
Net cash used in operating activities	(222,757)	(218)
Net cash used in investing activities	(70,330)	0
Net cash provided by financing activities	$ 292,381	$ 105,379

X

- Definition

The amount of net cash provided by financing activities between the reporting entity and the Variable Interest Entity (VIE).

+ References

No definition available.

+ Details

Name:	NCRA_VariableInterestEntityActivityBetweenVIEAndEntityNetCashProvidedByFinancingActivites
Namespace Prefix:	NCRA_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of net cash used in operating activities between the reporting entity and the Variable Interest Entity (VIE).

+ References

No definition available.

+ Details

Name:	NCRA_VariableInterestEntityActivityBetweenVIEAndEntityNetCashUsedInOperatingActivities
Namespace Prefix:	NCRA_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of net cash used in investing activities between the reporting entity and the Variable Interest Entity (VIE).

+ References

No definition available.

+ Details

Name:	NCRA_VariableInterestEntityActivityBetweenVIEAndEntityRevenuesVariableInterestEntityActivityBetweenVIEAndEntityNetCashUsedInInvestingActivites
Namespace Prefix:	NCRA_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Description of the amount of pre-tax income (loss) derived by the reporting entity from the Variable Interest Entity (VIE).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph d
-URI http://asc.fasb.org/extlink&oid=108788376&loc=d3e5747-111685

+ Details

Name:	us-gaap_VariableInterestEntityActivityBetweenVIEAndEntityIncomeOrLossBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of income between the reporting entity and the Variable Interest Entity (VIE).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph d
-URI http://asc.fasb.org/extlink&oid=108788376&loc=d3e5747-111685

+ Details

Name:	us-gaap_VariableInterestEntityActivityBetweenVIEAndEntityRevenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=NCRA_GzWfhMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: