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REVENUE, CONTRACT ASSETS AND LIABILITIES AND OTHER CONTRACT MATTERS - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 80,456 | $ 54,014 | $ 148,061 | $ 111,304
Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | (3,591) | (1,283) | (4,806) | (1,771)
Fabrication |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 22,415 | 9,472 | 35,046 | 26,815
Shipyard |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 37,567 | 23,620 | 74,154 | 42,185
Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 24,065 | 22,205 | 43,667 | 44,075
Fixed-price and unit-rate |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 68,458 | 40,265 | 120,332 | 84,667
Fixed-price and unit-rate | Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | (3,232) | (1,042) | (3,846) | (1,495)
Fixed-price and unit-rate | Fabrication |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 22,415 | 9,472 | 35,046 | 26,815
Fixed-price and unit-rate | Shipyard |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 36,607 | 21,259 | 70,233 | 38,481
Fixed-price and unit-rate | Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 12,668 | 10,576 | 18,899 | 20,866
T&M |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 9,147 | 12,847 | 22,730 | 24,775
T&M | Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
T&M | Fabrication |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
T&M | Shipyard |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 960 | 2,361 | 3,921 | 3,704
T&M | Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 8,187 | 10,486 | 18,809 | 21,071
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 2,851 | 902 | 4,999 | 1,862
Other | Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | (359) | (241) | (960) | (276)
Other | Fabrication |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Other | Shipyard |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Other | Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 3,210 | $ 1,143 | $ 5,959 | $ 2,138

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- Definition Amount, excluding 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. + References Reference 1: 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 Reference 2: 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 + Details
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