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Inventory (Tables) | 12 Months Ended
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Dec. 31, 2019
Inventory Disclosure [Abstract] |
Schedule of Inventory and Allowance | Our inventory, net of allowance for obsolescence of $24,000 and $19,000 at December 31, 2019 and 2018, respectively, consisted of the following (in thousands):
| 2019 |  | 2018
Raw materials - current | $ | 19,388 |  |  | $ | 26,152 |
Work-in-process | 1,692 |  |  | 3,016 |
Finished goods | — |  |  | 1,022 |
Inventory - current | 21,080 |  |  | 30,190 |
Raw materials - long term (net of allowances of $24 and $19, respectively | 1,068 |  |  | 3,980 |
Inventory - total | $ | 22,148 |  |  | $ | 34,170 |
A summary of our inventory allowance is as follows:
| Year Ended December 31, |  |  |  |
($ in thousands) | 2019 |  | 2018 |  | 2017
Beginning balance | $ | (19) |  |  | $ | (15) |  |  | $ | (15) |
Accruals | (3,758) |  |  | (4) |  |  | (273) |
Write-offs | 3,753 |  |  | — |  |  | 273 |
Ending balance | (24) |  |  | (19) |  |  | (15) |

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