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Inventory | 3 Months Ended
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Mar. 31, 2021
Inventory Disclosure [Abstract] |
Inventory | Inventory Inventories are comprised of unprocessed tissue, work-in-process, Avance® Nerve Graft, Axoguard® Nerve Connector, Axoguard® Nerve Protector, Axoguard® Nerve Cap, Avive® Soft Tissue Membrane, Acroval® Neurosensory and Motor Testing System, Axotouch® Two-Point Discriminator and supplies and are valued at the lower of cost (first-in, first-out) or net realizable value and consist of the following:
| March 31, 2021 |  | December 31, 2020
Finished goods | $ | 9,309 |  |  | $ | 8,876 |
Work in process | 782 |  |  | 751 |
Raw materials | 3,297 |  |  | 2,902 |
Inventories | $ | 13,388 |  |  | $ | 12,529 |
The Company monitors the shelf life of its products and historical expiration and spoilage trends and writes-down inventory based on the estimated amount of inventory that may not be distributed before expiration or spoilage. For the three months ended March 31, 2021 and 2020, the Company had adjustments to the provision for inventory write downs of $783 and $924 respectively.

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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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