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Inventories | 12 Months Ended
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Dec. 31, 2018
Inventories [Abstract] |
Inventories | Inventories:
|  | December 31, 2018 |  |  | December 31, 2017 |
Raw materials and consumables |  | $ | 15,547 |  |  | $ | 8,663 |
Work-in-progress |  | 10,034 |  |  | 4,694 |
Finished goods |  | 1,460 |  |  | 2,440 |
Service inventory |  | 2,270 |  |  | 1,495 |
|  | $ | 29,311 |  |  | $ | 17,292 |
In 2018, the amount of raw materials and consumables, finished goods and work-in-progress recognized as cost of product and service revenues amounted to $39,647,000 (2017 - $55,342,000). In 2018, the write-down of inventories to net realizable value amounted to $1,300,000 (2017 - $611,000) and the reversal of previously recorded write-downs amounted to $409,000 (2017 - $531,000), resulting in a net write-down of $891,000 (2017 - $80,000). Write-downs and reversals are included in either cost of product and service revenues, or research and product development expense, depending on the nature of inventory.

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