| Schedule of changes in the carrying amount of goodwill |
| | | 2013 | | | 2012 | | | Balance as of January 1 | | | | | | | | | | Gross goodwill | | $ | 6,925 | | | $ | 6,925 | | | Accumulated impairment losses | | | (5,441 | ) | | | — | | | Net goodwill as of January 1 | | | 1,484 | | | | 6,925 | | | Goodwill acquired during the year | | | — | | | | — | | | Impairment loss | | | (1,484 | ) | | | (5,441 | ) | | Balance as of December 31 | | | | | | | | | | Gross goodwill | | | 6,925 | | | | 6,925 | | | Accumulated impairment losses | | | (6,925 | ) | | | (5,441 | ) | | Net goodwill as of December 31 | | | $— | | | $ | 1,484 | |
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| Schedule of definite-lived intangibles |
| | | As of December 31, 2014 | | | | | Gross Carrying Amount | | | Accumulated Amortization | | | Write-off of Fully Amortized Asset | | | Transfers from Indefinite-life Classification | | | Net Carrying Amount | | | Weighted Average Amortization Period | | | | | | | | | | | | | | | | | | | | | | | Customer relationships | | $ | 41,500 | | | $ | (23,839 | ) | | $ | — | | | $ | — | | | $ | 17,661 | | | | 8.0 years | | | Non-compete agreements | | | 4,100 | | | | (2,949 | ) | | | — | | | | — | | | | 1,151 | | | | 4.8 years | | | Other Trademarks | | | 3,500 | | | | (2,216 | ) | | | — | | | | — | | | | 1,284 | | | | 9.7 years | | | iFrogz Trademark | | | 7,038 | | | | (1,152 | ) | | | — | | | | — | | | | 5,886 | | | | 10.0 years | | | EarPollution Trademark | | | 2,383 | | | | (1,026 | ) | | | — | | | | — | | | | 1,357 | | | | 8.0 years | | | Other | | | 600 | | | | (554 | ) | | | — | | | | — | | | | 46 | | | | 5.0 years | | | Acquired technology | | | 709 | | | | (267 | ) | | | — | | | | — | | | | 442 | | | | 7.0 years | | | Internet address | | | 124 | | | | (78 | ) | | | — | | | | — | | | | 46 | | | | 10.0 years | | | Patents | | | 4,696 | | | | (1,161 | ) | | | — | | | | — | | | | 3,535 | | | | 12.5-14.0 years | | | Total amortizable assets | | $ | 64,650 | | | $ | (33,242 | ) | | $ | — | | | $ | — | | | $ | 31,408 | | | | 8.4 years | |
| | | As of December 31, 2013 | | | | | Gross Carrying Amount | | | Accumulated Amortization | | | Write-off of Fully Amortized Asset | | | Transfers from Indefinite-life Classification | | | Net Carrying Amount | | | Weighted Average Amortization Period | | | | | | | | | | | | | | | | | | | | | | | Customer relationships | | $ | 41,500 | | | $ | (17,537 | ) | | $ | — | | | $ | — | | | $ | 23,963 | | | | 8.0 years | | | Non-compete agreements | | | 4,100 | | | | (2,169 | ) | | | — | | | | — | | | | 1,931 | | | | 4.8 years | | | Other Trademarks | | | 3,500 | | | | (1,719 | ) | | | — | | | | — | | | | 1,781 | | | | 9.7 years | | | iFrogz Trademark | | | — | | | | — | | | | — | | | | 7,038 | | | | 7,038 | | | | 10.0 years | | | EarPollution Trademark | | | 2,383 | | | | (554 | ) | | | — | | | | — | | | | 1,829 | | | | 8.0 years | | | Other | | | 661 | | | | (487 | ) | | | (61 | ) | | | — | | | | 113 | | | | 5.0 years | | | Acquired technology | | | 709 | | | | (165 | ) | | | — | | | | — | | | | 544 | | | | 7.0 years | | | Internet address | | | 124 | | | | (66 | ) | | | — | | | | — | | | | 58 | | | | 10.0 years | | | Patents | | | 4,696 | | | | (734 | ) | | | — | | | | — | | | | 3,962 | | | | 12.5-14.0 years | | | Total amortizable assets | | $ | 57,673 | | | $ | (23,431 | ) | | $ | (61 | ) | | $ | 7,038 | | | $ | 41,219 | | | | 8.4 years | |
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