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Inventories (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
Inventory Disclosure [Abstract] |  |
Losses incurred on valuation of inventory and write-off of obsolete inventory | $ 496 | $ 946
Deferred cost of goods sold | 1,628 | 1,698
Current: |  |
Raw materials | 2,735 | 3,056
Finished goods | 10,712 | 9,710
Inventories | 13,447 | 12,766
Long-term: |  |
Raw materials | 375 | 59
Finished goods | 1,643 | 817
Inventories, long-term | $ 2,018 | $ 876

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