XML 60 R38.htm IDEA: XBRL DOCUMENT v3.20.4

Other long term obligations (Tables)

12 Months Ended

Dec. 31, 2020

Other Liabilities Disclosure [Abstract]

Schedule of other long term obligations

			Note						December 31, 2020						December 31, 2019
Directors' deferred stock unit plan			17(c)						$	10,761					$	14,375
Deferred gain on sale-leaseback			13(a)						4,748						6,593
Other									3,341						3,536
									$	18,850					$	24,504

Schedule of deferred gain on sale-leaseback

						December 31, 2020						December 31, 2019
Balance, beginning of year						$	6,593					$	8,438
Amortization of deferred gain on sale-leaseback						(1,845)						(1,845)
Balance, end of year						$	4,748					$	6,593

X

- Definition

Schedule of Other Liabilities [Table Text Block]

+ References

No definition available.

+ Details

Name:	noa_ScheduleOfOtherLiabilitiesTableTextBlock
Namespace Prefix:	noa_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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

X

- Definition

Tabular disclosure of sale leaseback transactions.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121586228&loc=d3e50796-112755

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121549808&loc=d3e36991-112694

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121602099&loc=d3e50824-112756

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 40
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121606570&loc=SL77919786-209982

+ Details

Name:	us-gaap_ScheduleOfSaleLeasebackTransactionsTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration