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Net Asset Value and Financial Highlights (Details) - $ / shares
 3 Months Ended 9 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
BREAKWAVE DRY BULK SHIPPING ETF        
Net Asset Value        
Net asset value per Share, beginning of Period $ 15.37 $ 18.56 $ 13.25 $ 21.98
Net investment income (loss) (0.11) (0.09) (0.34) (0.39)
Net realized and unrealized gain (loss) (8.76) (8.95) (6.41) (12.07)
Net Income (Loss) (8.87) (9.04) (6.75) (12.46)
Net Asset Value per Share, end of Period 6.5 9.52 6.5 9.52
Market Value per Share, end of Period $ 6.39 $ 9.36 $ 6.39 $ 9.36
Ratios to Average Net Assets        
Expense Ratio [1] 7.04% 5.13% 6.19% 4.61%
Expense Ratio before Waiver/Assumption [1] 12.37% 28.20% 17.62% 23.42%
Net Investment Income (Loss) (6.10%) (3.13%) (4.96%) [2] (2.88%)
Total Return, at Net Asset Value [3] (57.71%) (48.71%) (50.94%) (56.69%)
Total Return, at Market Value (58.64%) [2] (47.77%) [3] (51.41%) [3] (57.53%) [3]
SIT RISING RATE ETF [Member]        
Net Asset Value        
Net asset value per Share, beginning of Period $ 22.96 $ 24.06 $ 22.7 $ 24.65
Net investment income (loss) 0.02 0.08 0.14 0.19
Net realized and unrealized gain (loss) (2.45) (0.49) (2.31) (1.19)
Net Income (Loss) (2.43) (0.41) (2.17) (1.00)
Net Asset Value per Share, end of Period 20.53 23.65 20.53 23.65
Market Value per Share, end of Period $ 20.53 $ 23.59 $ 20.53 $ 23.59
Ratios to Average Net Assets        
Expense Ratio [1] 1.08% 1.11% 1.08% 1.11%
Expense Ratio before Waiver/Assumption [1] 8.41% 1.63% 7.09% 1.36%
Net Investment Income (Loss) 0.43% 1.25% 0.86% [2] 1.03%
Total Return, at Net Asset Value [3] (10.58%) (1.70%) (9.56%) (4.06%)
Total Return, at Market Value [3] (10.62%) (2.08%) (9.68%) (4.34%)
[1] For Sit Rising Rate ETF, Fund expenses have been capped at 1.00% of average daily net assets, plus brokerage commissions and interest expense. For Breakwave Dry Bulk Shipping ETF, Fund expenses have been capped at 3.50% of average daily net assets, plus brokerage commissions and interest expense.
[2] Percentages are annualized
[3] Percentages are not annualized