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Revenue Recognition (Tables) | 12 Months Ended
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Dec. 31, 2023
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | Disaggregated information is as follows (in thousands):
| Year Ended December 31, |  |
| 2023 |  | 2022 |  | 2021 |  |  |  |  |  |
Major products and service: |  |  |  |  |  |  |  |  |  |  |
Product revenue | $ | 42,906 |  |  | $ | 116,676 |  |  | $ | 70,657 |  |  |  |  |  |  |
Research and development revenue | 27,237 |  |  | 21,914 |  |  | 34,097 |  |  |  |  |  |  |
Total revenues | $ | 70,143 |  |  | $ | 138,590 |  |  | $ | 104,754 |  |  |  |  |  |  |
Primary geographical markets: |  |  |  |  |  |  |  |  |  |  |
Americas | $ | 13,733 |  |  | $ | 17,000 |  |  | $ | 23,481 |  |  |  |  |  |  |
EMEA | 22,907 |  |  | 56,540 |  |  | 20,187 |  |  |  |  |  |  |
APAC | 33,503 |  |  | 65,050 |  |  | 61,086 |  |  |  |  |  |  |
Total revenues | $ | 70,143 |  |  | $ | 138,590 |  |  | $ | 104,754 |  |  |  |  |  |  |
Contract with Customer | The following table presents balances of contract assets, unbilled receivables, contract costs, and contract liabilities (in thousands):
| December 31, 2023 |  | December 31, 2022
Contract assets | $ | 815 |  |  | $ | 2,116 |
Unbilled receivables | $ | 9,904 |  |  | $ | 7,016 |
Contract costs | $ | — |  |  | $ | 19 |
Contract liabilities: deferred revenue | $ | 10,761 |  |  | $ | 30,609 |
We recognized the following revenues (in thousands):
| Year Ended December 31,
Revenue recognized in the period for: | 2023 |  | 2022
Amounts included in contract liabilities at the beginning of the period: |  |  |
Performance obligations satisfied | $ | 17,937 |  |  | $ | 2,038 |
Changes in the period: |  |  |
Changes in the estimated transaction price allocated to performance obligations satisfied in prior periods | 4,165 |  |  | 279 |
Performance obligations satisfied from new activities in the period - contract revenue | 48,041 |  |  | 136,273 |
Total revenues | $ | 70,143 |  |  | $ | 138,590 |
Performance Obligation, Expected Timing of Satisfaction | The balances in the table below are partially based on judgments involved in estimating future orders from customers subject to the exercise of material rights pursuant to respective contracts (in thousands):
| 2024 |  | 2025 |  | 2026 |  | 2027 and Thereafter |  | Total
Product revenue | $ | 10,121 |  |  | $ | 140 |  |  | $ | 140 |  |  | $ | 360 |  |  | $ | 10,761 |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-10 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-5 + Details
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- Definition Tabular disclosure of expected timing for satisfying remaining performance obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b)(1) -SubTopic 10 -Topic 606 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-13 + Details
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