Deferred revenues consisted of the following:
| December 31, | ||||||||
| 2013 | 2012 | |||||||
| 
  Service activation fees  | 
 $ | 3,135 | $ | 2,690 | ||||
| 
  Prepaid services  | 
 1,949 | 1,331 | ||||||
| 
  Prepaid product revenues  | 
 104 | — | ||||||
| 
  Warranty revenues  | 
 272 | 332 | ||||||
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 |||||
| 5,460 | 4,353 | |||||||
| 
  Less current portion  | 
 (3,087 | ) | (2,394 | ) | ||||
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| 
  Long-term portion  | 
 $ | 2,373 | $ | 1,959 | ||||
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