XML 119 R100.htm IDEA: XBRL DOCUMENT v3.10.0.1

Shares - Dividends (Details) - CAD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Equity [Abstract]
Annual aggregate dividend (in CAD per share)	$ 0.08
Quarterly dividends paid (CAD per share)	$ 0.02000	$ 0.02
Dividends payable	$ 500	$ 510

X

- Definition

Common Stock, Quarterly Dividends, Per Share, Cash Paid

+ References

No definition available.

+ Details

Name:	noa_CommonStockQuarterlyDividendsPerShareCashPaid
Namespace Prefix:	noa_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Dividends Payable, Annual Aggregate Dividend

+ References

No definition available.

+ Details

Name:	noa_DividendsPayableAnnualAggregateDividend
Namespace Prefix:	noa_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ 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 210.5-02.20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6935-107765

+ Details

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

X

- References

No definition available.

+ Details

Name:	us-gaap_EquityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration