Balance Sheet Components |
Balance Sheet Components Goodwill
The changes in the carrying amounts of goodwill were as follows (in thousands of dollars):
| | | | | | | Amounts | Balance as of December 31, 2020 | $ | 2,725 | | Goodwill Acquired - Decipher Biosciences | 469,039 | | Balance as of June 30, 2021 | $ | 471,764 | |
Intangible Assets, Net
Intangible assets include finite-lived product technology, customer relationships, licenses and trade names and indefinite-lived in-process research and development. Intangible assets consisted of the following (in thousands of dollars):
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | June 30, 2021 | | December 31, 2020 | | Weighted Average Amortization Period (Years) | | Gross Carrying Amount | | Accumulated Amortization | | Net Carrying Amount | | Gross Carrying Amount | | Accumulated Amortization | | Net Carrying Amount | | Percepta product technology | $ | 16,000 | | | $ | (6,667) | | | $ | 9,333 | | | $ | 16,000 | | | $ | (6,133) | | | $ | 9,867 | | | 15 | Prosigna product technology | 4,120 | | | (435) | | | 3,685 | | | 4,120 | | | (298) | | | 3,822 | | | 15 | Prosigna customer relationships | 2,430 | | | (770) | | | 1,660 | | | 2,430 | | | (526) | | | 1,904 | | | 5 | nCounter Dx license | 46,880 | | | (4,947) | | | 41,933 | | | 46,880 | | | (3,386) | | | 43,494 | | | 15 | LymphMark product technology | 990 | | | (224) | | | 766 | | | 990 | | | (153) | | | 837 | | | 7 | Decipher product technology | 90,000 | | | (2,734) | | | 87,266 | | | — | | | — | | | — | | | 10 | Decipher trade names | 4,000 | | | (243) | | | 3,757 | | | — | | | — | | | — | | | 5 | Total finite-lived intangibles | 164,420 | | | (16,020) | | | 148,400 | | | 70,420 | | | (10,496) | | | 59,924 | | | 11.7 | In-process research and development | 7,300 | | | — | | | 7,300 | | | — | | | — | | | — | | | | Total intangible assets | $ | 171,720 | | | $ | (16,020) | | | $ | 155,700 | | | $ | 70,420 | | | $ | (10,496) | | | $ | 59,924 | | | |
Amortization of the finite-lived intangible assets is recognized on a straight-line basis. Amortization expense of $3.7 million and $1.3 million was recognized for the three months ended June 30, 2021 and 2020, respectively. Amortization expense of $5.5 million and $2.5 million was recognized for the six months ended June 30, 2021 and 2020, respectively. The estimated future aggregate amortization expense as of June 30, 2021 is as follows (in thousands of dollars): | | | | | | Year Ending December 31, | Amounts | 2021 remainder of year | $ | 7,448 | | 2022 | 14,894 | | 2023 | 14,894 | | 2024 | 14,854 | | 2025 | 14,408 | | Thereafter | 81,902 | | Total | $ | 148,400 | | Accrued Liabilities
Accrued liabilities consisted of the following (in thousands of dollars): | | | | | | | | | | | | | June 30, 2021 | | December 31, 2020 | Accrued compensation expenses | $ | 12,600 | | | $ | 9,201 | | Accrued other | 8,156 | | | 2,504 | | Total accrued liabilities | $ | 20,756 | | | $ | 11,705 | |
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