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Inventories - Schedule of Inventory (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Inventory Disclosure [Abstract] |  |
Raw materials | $ 2,695 | $ 3,937
Finished goods | 5,840 | 5,749
Reserve for excess, obsolete, and slow-moving inventories | (2,894) | (3,518)
Inventories, net | 5,641 | 6,168
Provision for slow-moving and obsolete inventories | (600) | (600)
Reduction of gross inventory levels | $ (1,200) | $ 1,900

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