| 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 |
| North Shore Equity Rotation ETF | |
| Shareholder Report [Line Items] | |
| Fund Name | North Shore Equity Rotation ETF |
| Class Name | North Shore Equity Rotation ETF |
| Trading Symbol | KOOL |
| 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.kooletf.com (800) 773-3863 |
| Additional Information Phone Number | (800) 773-3863 |
| Additional Information Website | www.kooletf.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 KOOL $ 47 0.90 |
| Expenses Paid, Amount | $ 47 |
| Expense Ratio, Percent | 0.90% |
| Net Assets | $ 40,567,367 |
| Holdings Count | Holdings | 30 |
| Investment Company, Portfolio Turnover | 23.50% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of September 30, 2024 ) Net Assets $40,567,367 Number of Holdings 30 Annual Portfolio Turnover 23.50% |
| Holdings [Text Block] | What did the Fund invest in? (as of September 30, 2024 ) Sector Breakdown (% of net assets) Sector % Financials 0.272 Technology 0.264 Health Care 0.111 Communications 0.078 Consumer Discretionary 0.057 Energy 0.054000000000000006 Industrials 0.046 Consumer Staples 0.038 Utilities 0.036000000000000004 Other 0.043 |
| Largest Holdings [Text Block] | Top Ten Holdings (% of net assets) Technology Select Sector SPDR Fund 12.5% iShares Core S&P 500 ETF 10.5% Financial Select Sector SPDR Fund 8.4% Health Care Select Sector SPDR Fund 7.7% NVIDIA Corp 5.4% Apple Inc 4.2% Microsoft Corp 4.2% Amazon.com Inc 4.1% iShares Core S&P Small-Cap ETF 3.9% Alphabet Inc 3.9% |
| Shareholder Report, Holdings (Details) - North Shore Equity Rotation ETF | Sep. 30, 2024 |
| Technology Select Sector SPDR Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.50% |
| iShares Core S&P 500 ETF [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.50% |
| Financial Select Sector SPDR Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.40% |
| Health Care Select Sector SPDR Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.70% |
| NVIDIA Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| Apple Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Microsoft Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Amazon.com Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| iShares Core S&P Small-Cap ETF [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| Alphabet Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.20% |
| Technology [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.40% |
| Health Care [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| Communication [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| Consumer Discretionary [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| Energy [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| Industrials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Consumer Staples [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| Utilities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
