| Form N-CSR Cover | 6 Months Ended |
| Sep. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Spinnaker ETF Series |
| Entity Central Index Key | 0001484018 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Sep. 30, 2024 |
| Shareholder Report | 6 Months Ended |
| Sep. 30, 2024 USD ($) Holdings | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Spinnaker ETF Series |
| Entity Central Index Key | 0001484018 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Sep. 30, 2024 |
| Obra High Grade Structured Products ETF | |
| Shareholder Report [Line Items] | |
| Fund Name | Obra High Grade Structured Products ETF |
| Class Name | Obra High Grade Structured Products ETF |
| Trading Symbol | OGSP |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at www.obrafunds.com (800) 773-3863 |
| Additional Information Phone Number | (800) 773-3863 |
| Additional Information Website | www.obrafunds.com |
| Expenses [Text Block] | What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment OGSP $ 44 0.86 |
| Expenses Paid, Amount | $ 44 |
| Expense Ratio, Percent | 0.86% |
| Net Assets | $ 26,393,881 |
| Holdings Count | Holdings | 50 |
| Investment Company, Portfolio Turnover | 35.58% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of September 30, 2024 ) Net Assets $26,393,881 Number of Holdings 50 Annual Portfolio Turnover 35.58% |
| Holdings [Text Block] | What did the Fund invest in? (as of September 30, 2024) Sector Breakdown (% of net assets) Sector % Collateralized Loan Obligations 0.394 Asset-Backed Securities 0.246 Collateralized Mortgage Obligations 0.232 Mortgage-Backed Securities 0.042 Commercial Mortgage-Backed Securities 0.023 Other 0.063 |
| Largest Holdings [Text Block] | Top Ten Holdings (% of net assets) Elmwood CLO 23 Ltd, 8.29%, 04/16/36 3.2% Dryden 105 CLO Ltd, 8.38%, 04/18/36 3.1% Hotwire Funding LLC, 5.69%, 05/20/53 2.9% AGL CLO 30 Ltd, 7.58%, 04/21/37 2.9% GWT 2024-WLF2, 7.54%, 05/15/41 2.9% Antares CLO 2021-1 Ltd, 9.45%, 07/25/33 2.5% Ivy Hill Middle Market Credit Fund XXI Ltd, 8.73%, 07/18/35 2.5% Madison Park Funding LXI Ltd, 8.18%, 01/20/37 2.5% GRACIE POINT INTERNATIONAL FUNDING 2023-2, 9.37%, 03/01/27 2.4% Madison Park Funding XIV Ltd, 7.74%, 10/22/30 2.4% |
| Obra Opportunistic Structured Products ETF | |
| Shareholder Report [Line Items] | |
| Fund Name | Obra Opportunistic Structured Products ETF |
| Class Name | Obra Opportunistic Structured Products ETF |
| Trading Symbol | OOSP |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at www.obrafunds.com (800) 773-3863 |
| Additional Information Phone Number | (800) 773-3863 |
| Additional Information Website | www.obrafunds.com |
| Expenses [Text Block] | What were the Fund costs for the past year? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment OOSP $ 44 0.87 |
| Expenses Paid, Amount | $ 44 |
| Expense Ratio, Percent | 0.87% |
| Net Assets | $ 16,598,238 |
| Holdings Count | Holdings | 43 |
| Investment Company, Portfolio Turnover | 27.48% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of September 30, 2024 ) Net Assets $16,598,238 Number of Holdings 43 Annual Portfolio Turnover 27.48% |
| Holdings [Text Block] | What did the Fund invest in? (as of September 30, 2024 ) Sector Breakdown (% of net assets) Sector % Collateralized Loan Obligations 0.547 Asset-Backed Securities 0.159 Collateralized Mortgage Obligations 0.157 Mortgage-Backed Securities 0.046 Commercial Mortgage-Backed Securities 0.024 Other 0.067 |
| Largest Holdings [Text Block] | Top Ten Holdings (% of net assets) Hotwire Funding LLC, 7.00%, 05/20/53 3.8% Texas Debt Capital CLO 2023-I Ltd, 10.38%, 04/20/36 3.5% Octagon 67 Ltd, 10.48%, 04/25/36 3.4% ACHM Trust 2023-HE1, 7.00%, 11/25/37 3.2% Kobalt Music Assets LP, 6.63%, 04/07/64 3.1% Oaktree CLO 2023-2 Ltd, 10.73%, 07/20/36 3.1% Benefit Street Partners CLO XXXI Ltd, 10.28%, 04/25/36 3.1% Bain Capital CLO 2024-1 Ltd, 9.17%, 04/16/37 3.1% GRACIE POINT INTERNATIONAL FUNDING 2023-2, 9.37%, 03/01/27 3.0% Balboa Bay Loan Funding 2023-1 Ltd, 9.08%, 04/20/36 3.0% |
| Shareholder Report, Holdings (Details) | Sep. 30, 2024 |
| Obra High Grade Structured Products ETF | Elmwood CLO 23 Ltd, 8.29%, 04/16/36 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| Obra High Grade Structured Products ETF | Dryden 105 CLO Ltd, 8.38%, 04/18/36 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Obra High Grade Structured Products ETF | Hotwire Funding LLC, 5.69%, 05/20/53 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Obra High Grade Structured Products ETF | AGL CLO 30 Ltd, 7.58%, 04/21/37 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Obra High Grade Structured Products ETF | GWT 2024-WLF2, 7.54%, 05/15/41 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Obra High Grade Structured Products ETF | Antares CLO 2021-1 Ltd, 9.45%, 07/25/33 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Obra High Grade Structured Products ETF | Ivy Hill Middle Market Credit Fund XXI Ltd, 8.73%, 07/18/35 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Obra High Grade Structured Products ETF | Madison Park Funding LXI Ltd, 8.18%, 01/20/37 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Obra High Grade Structured Products ETF | GRACIE POINT INTERNATIONAL FUNDING 2023-2, 9.37%, 03/01/27 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Obra High Grade Structured Products ETF | Madison Park Funding XIV Ltd, 7.74%, 10/22/30 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Obra High Grade Structured Products ETF | Collateralized Loan Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 39.40% |
| Obra High Grade Structured Products ETF | Asset-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 24.60% |
| Obra High Grade Structured Products ETF | Collateralized Mortgage Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.20% |
| Obra High Grade Structured Products ETF | Collateralized Mortgage-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Obra High Grade Structured Products ETF | Commercial Mortgage-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Obra High Grade Structured Products ETF | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| Obra Opportunistic Structured Products ETF | GRACIE POINT INTERNATIONAL FUNDING 2023-2, 9.37%, 03/01/27 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Obra Opportunistic Structured Products ETF | Hotwire Funding LLC, 7.00%, 05/20/53 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| Obra Opportunistic Structured Products ETF | Texas Debt Capital CLO 2023-I Ltd, 10.38%, 04/20/36 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Obra Opportunistic Structured Products ETF | Octagon 67 Ltd, 10.48%, 04/25/36 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| Obra Opportunistic Structured Products ETF | ACHM Trust 2023-HE1, 7.00%, 11/25/37 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| Obra Opportunistic Structured Products ETF | Kobalt Music Assets LP, 6.63%, 04/07/64 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Obra Opportunistic Structured Products ETF | Oaktree CLO 2023-2 Ltd, 10.73%, 07/20/36 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Obra Opportunistic Structured Products ETF | Benefit Street Partners CLO XXXI Ltd, 10.28%, 04/25/36 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Obra Opportunistic Structured Products ETF | Bain Capital CLO 2024-1 Ltd, 9.17%, 04/16/37 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Obra Opportunistic Structured Products ETF | Balboa Bay Loan Funding 2023-1 Ltd, 9.08%, 04/20/36 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Obra Opportunistic Structured Products ETF | Collateralized Loan Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 54.70% |
| Obra Opportunistic Structured Products ETF | Asset-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.90% |
| Obra Opportunistic Structured Products ETF | Collateralized Mortgage Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.70% |
| Obra Opportunistic Structured Products ETF | Collateralized Mortgage-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Obra Opportunistic Structured Products ETF | Commercial Mortgage-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Obra Opportunistic Structured Products ETF | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
