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REVENUE, CONTRACT ASSETS AND LIABILITIES AND OTHER CONTRACT MATTERS (Tables) | 12 Months Ended
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Dec. 31, 2018
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following tables summarize revenue for each of our operating segments, disaggregated by contract type and timing of revenue recognition, for 2018, 2017 and 2016 (in thousands):
|  | 2018
|  | Fabrication |  | Shipyard |  | Services |  | EPC |  | Eliminations |  | Total
Contract Type |  |  |  |  |  |  |  |  |  |  |
Fixed-price and unit-rate (1) | $ | 37,943 |  |  | $ | 88,887 |  |  | $ | 38,612 |  |  | $ | 2,477 |  |  | $ | (2,414 | ) |  | $ | 165,505 |
T&M (2) | — |  |  | 7,537 |  |  | 43,481 |  |  | — |  |  | — |  |  | 51,018 |
Other | — |  |  | — |  |  | 6,137 |  |  | — |  |  | (1,413 | ) |  | 4,724 |
| Total | $ | 37,943 |  |  | $ | 96,424 |  |  | $ | 88,230 |  |  | $ | 2,477 |  |  | $ | (3,827 | ) |  | $ | 221,247 |
|  | 2017
|  | Fabrication |  | Shipyard |  | Services |  | EPC |  | Eliminations |  | Total
Contract Type |  |  |  |  |  |  |  |  |  |  |
Fixed-price and unit-rate (1) | $ | 57,880 |  |  | $ | 47,787 |  |  | $ | 28,465 |  |  | $ | 198 |  |  | $ | (5,096 | ) |  | $ | 129,234 |
T&M (2) | — |  |  | 4,912 |  |  | 35,180 |  |  | — |  |  | — |  |  | 40,092 |
Other | — |  |  | — |  |  | 1,800 |  |  | — |  |  | (104 | ) |  | 1,696 |
| Total | $ | 57,880 |  |  | $ | 52,699 |  |  | $ | 65,445 |  |  | $ | 198 |  |  | $ | (5,200 | ) |  | $ | 171,022 |
|  | 2016
|  | Fabrication |  | Shipyard |  | Services |  | EPC |  | Eliminations |  | Total
Contract Type |  |  |  |  |  |  |  |  |  |  |
Fixed-price and unit-rate (1) | $ | 88,683 |  |  | $ | 95,958 |  |  | $ | 31,191 |  |  | $ | — |  |  | $ | (3,062 | ) |  | $ | 212,770 |
T&M (2) |  |  | 13,544 |  |  | 58,882 |  |  | — |  |  | — |  |  | 72,426 |
Other | — |  |  | — |  |  | 1,341 |  |  | — |  |  | (211 | ) |  | 1,130 |
| Total | $ | 88,683 |  |  | $ | 109,502 |  |  | $ | 91,414 |  |  | $ | — |  |  | $ | (3,273 | ) |  | $ | 286,326 |
____________ (1) Revenue is recognized as the contract is progressed over time. (2) Revenue is recognized at contracted rates when the work is performed and costs are incurred.
Revenue, Remaining Performance Obligation | The following tables summarize the remaining revenue to be earned under performance obligations for the portion of contracts not yet completed as of December 31, 2018 (in thousands).
Segment |  | Performance Obligations at December 31, 2018
Fabrication |  | $ | 63,498 |
Shipyard (1) |  | 259,644 |
Services |  | 11,046 |
EPC |  | 385 |
Total |  | $ | 334,573 |
_____________ (1) Amount excludes approximately $21.9 million of remaining performance obligations related to contracts for the construction of two MPSVs that are subject to dispute pursuant to a termination notice from our customer. See Note 11 for further discussion of these contracts. We expect to recognize revenue for our remaining performance obligations in the following periods (in thousands):
Year |  | Total
2019 |  | $ | 233,987 |
2020 |  | 81,464 |
2021 |  | 19,122 |
Total |  | $ | 334,573 |
Contract with Customer, Asset and Liability | Information with respect to uncompleted contracts at December 31, 2018 and 2017 is as follows (in thousands):
| December 31,
| 2018 |  | 2017
Costs incurred on uncompleted contracts | $ | 253,871 |  |  | $ | 266,902 |
Estimated profit (loss) earned to date | (35,470 | ) |  | (26,954 | )
Prepaid subcontractor costs | 2,368 |  |  | — |
Sub-total | 220,769 |  |  | 239,948 |
Billings to date | (190,588 | ) |  | (224,329 | )
Deferred revenue (1) | (4,592 | ) |  | — |
Total | $ | 25,589 |  |  | $ | 15,619 |
______________
(1) | Deferred revenue is included within other noncurrent assets as further discussed below.
The above amounts are included in the accompanying Balance Sheet at December 31, 2018 and 2017 under the following captions (in thousands):
| December 31,
| 2018 |  | 2017
Contract assets | $ | 29,982 |  |  | $ | 28,373 |
Contract liabilities (1), (2), (3) | (16,845 | ) |  | (12,754 | )
Sub-total | 13,137 |  |  | 15,619 |
Contract assets, noncurrent (1) | 12,452 |  |  | — |
Total | $ | 25,589 |  |  | $ | 15,619 |
______________
(1) | The increase in contract liabilities compared to December 31, 2017, was primarily due to advance payments for two separate projects in our Fabrication and Shipyard Divisions, offset partially by the reclassification of accrued contract losses (included within contract liabilities) to other noncurrent assets. The accrued contract losses relate to our MPSV projects that are subject to dispute. In addition to the accrued contract losses that were reclassified to other noncurrent assets, contract assets and deferred revenue for these projects were also reclassified to other noncurrent assets, resulting in a net contract asset balance of $12.5 million for these projects within other noncurrent assets on our Balance Sheet at December 31, 2018. See Note 11 for further discussion of the dispute.
(2) | Revenue recognized during 2018 related to amounts included in our contract liabilities balance at December 31, 2017, was $5.1 million.
(3) | Contract liabilities at December 31, 2018 and 2017, includes accrued contract losses of $2.4 million and $7.6 million, respectively. See "Project Changes in Estimates" below for further discussion of our accrued contract losses.
Schedules of Concentration of Risk, by Risk Factor | However, for 2018, 2017 and 2016, certain customers individually accounted for 10% or more of our consolidated revenue as follows (in thousands):
| December 31,
Customer | 2018 |  | 2017 |  | 2016
A | $ | 49,123 |  |  | $ | 21,781 |  |  | * |
B | 25,873 |  |  | * |  |  | * |
C | 23,279 |  |  | * |  |  | * |
D | * |  |  | 44,724 |  |  | * |
E | * |  |  |  |  | 65,981 |
_____________ * The customer revenue was less than 10% of consolidated revenue for the year.

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