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Inventory | 9 Months Ended
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Sep. 30, 2020
Inventory Disclosure [Abstract] |
Inventory | Inventory Our inventory, net of allowance for obsolescence of $37,000 at September 30, 2020 and $24,000 at December 31, 2019, consisted of the following amounts:
| (in thousands)
| September 30, 2020 |  | December 31, 2019
Raw materials - current | $ | 16,275 |  |  | $ | 19,388 |
Work-in-process | 850 |  |  | 1,692 |
Inventory - current | 17,125 |  |  | 21,080 |
Raw materials - long term (net of allowances of $37 and $24, respectively) | 1,230 |  |  | 1,068 |
Inventory - total | $ | 18,355 |  |  | $ | 22,148 |
Our long-term inventory consists of raw materials that remain viable but that the Company does not expect to sell or use within the year. During the nine months ended September 30, 2020, there were no write-offs of obsolete inventory against the allowance for obsolescence. Inventory AllowanceDue to the slow moving nature or obsolescence of a portion of its long-term inventory and inventory related to the retirement of rental equipment, the Company recorded an increase of $3.35 million to its inventory allowance during the nine months ended September 30, 2019 for costs that may not be recoverable in the future. The Company did not record an increase to its inventory allowance during the nine months ended September 30, 2020.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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