XML 46 R32.htm IDEA: XBRL DOCUMENT v3.22.0.1

Note 4 - Inventories (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Schedule Of Inventory Current And Non Current [Table Text Block]

		December 31,
		2021				2020
Raw materials		$	44,697			$	20,631
Work-in-process			3,018				1,416
Finished goods			10,096				5,489
Supplies			1,840				1,641
Total inventories		$	59,651			$	29,177

X

- Definition

Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. Includes current and non-current inventory balances.

+ References

No definition available.

+ Details

Name:	nwpx_ScheduleOfInventoryCurrentAndNonCurrentTableTextBlock
Namespace Prefix:	nwpx_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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