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Note 3 - Revenue Recognition | 3 Months Ended
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Mar. 31, 2025
Notes to Financial Statements |
Revenue from Contract with Customer [Text Block] | Note 3. Revenue Recognition ​ ​ Disaggregation of Revenue ​ Revenue is classified based on the location where the product is manufactured. For additional information on the disaggregated revenues by geographical region, see Note 17, "Segment and Geographic Information." Revenue is also classified by major product categories and is presented below (in thousands): ​
|  | Three months ended March 31, |
|  |  |  |  |  | % of |  |  |  |  |  |  | % of |
​ |  | 2025 |  |  | Revenue |  |  | 2024 |  |  | Revenue |
CATV |  | $ | 64,501 |  |  |  | 64.6 | % |  | $ | 8,736 |  |  |  | 21.5 | %
Data Center |  |  | 32,049 |  |  |  | 32.1 | % |  |  | 28,986 |  |  |  | 71.2 | %
Telecom |  |  | 2,937 |  |  |  | 2.9 | % |  |  | 2,269 |  |  |  | 5.6 | %
FTTH |  |  | — |  |  |  | 0.0 | % |  |  | — |  |  |  | 0.0 | %
Other |  |  | 372 |  |  |  | 0.4 | % |  |  | 682 |  |  |  | 1.7 | %
Total Revenue |  | $ | 99,859 |  |  |  | 100.0 | % |  | $ | 40,673 |  |  |  | 100.0 | %
Unearned Revenue ​ We record unearned revenues when cash payments are received or due in advance of our performance, including amounts which are refundable. Unearned revenues solely relate to statement of work with Microsoft regarding contract prices allocated to the performance obligations that are unsatisfied, or partially unsatisfied, as of the balance sheet dates. Unearned revenue balance as of March 31, 2025 and December 31, 2024 were both zero. For the three months ended March 31, 2025 and 2024, revenue recognized from the unearned revenue balance was $0 and $0.1 million, respectively.
|  | Three months ended March 31, |
|  | 2025 |  |  | 2024 |
Unearned revenue, beginning of period |  | $ | — |  |  | $ | 1,803 |
Additional unearned revenue |  |  | — |  |  |  | — |
Revenue recognized |  |  | — |  |  |  | 114 |
Unearned revenue, end of period |  | $ | — |  |  | $ | 1,689 |
Customer Warrant On March 13, 2025, the Company issued a warrant (the "Customer Warrant") to a wholly-owned subsidiary of Amazon.com, Inc. ("Warrantholder") to purchase up to an aggregate of 7,945,399 shares of the Company's common stock ("Warrant Shares") at an exercise price of $23.6956 per share. The Customer Warrant has a contractual term of 10 years. At the time of the issuance, the Customer Warrant is exercisable to purchase 1,324,233 Warrant Shares. The remaining 6,621,166 Warrant Shares may vest over the next 10 years, dependent on aggregate purchases by or on behalf of Amazon and its affiliates of $4 billion of the Company's products over this time period. The Company accounts for the Customer Warrant as an equity classified share-based consideration to a customer and will recognize the grant-date fair value of the Customer Warrant as a reduction of revenue from Amazon as the related goods or services are transferred. As of March 13, 2025, the Company recorded other current asset of $1.7 million and other noncurrent asset of $15.1 million, representing the aggregate grant-date fair value of 1,324,233 Warrant Shares vested at the issuance. The grant date fair value of the Customer Warrant was determined to be $12.64 per share, using the Black-Scholes-Merton option pricing model. The per share grant date fair value of the Customer Warrant was estimated using the following assumptions:
|  | At Grant Date |
Expected volatility |  |  | 80.00 | %
Weighted-average expected term (in years) |  |  | 10 |
Risk-free interest rate |  |  | 4.23 | %
Dividend yield |  |  | — | %
Fair value per ordinary share at grant date |  | $ | 15.87 |

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-9 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -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 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-15 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-13 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Topic 606 -Publisher FASB -URI https://asc.fasb.org/606/tableOfContent + Details
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