REVENUES (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 54,926	$ 41,169	$ 103,560	$ 82,829
Eliminations
Disaggregation of Revenue [Line Items]
Revenues	(7)		(7)
Intersegment Revenues	(7)		(7)
Heavy Fabrications
Disaggregation of Revenue [Line Items]
Revenues	43,614	28,970	81,983	57,264
Gearing
Disaggregation of Revenue [Line Items]
Revenues	6,922	9,266	13,149	19,293
Intersegment Revenues	7		7
Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	$ 4,397	$ 2,933	$ 8,435	$ 6,272

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

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