XML 47 R36.htm IDEA: XBRL DOCUMENT v3.25.2
Investments in Affiliates - Summary of Transactions in, and Earnings from, Investments in Affiliates (Detail) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Investments In And Advances To Affiliates [Line Items]        
Beginning Value     $ 208,478,795  
Change in Unrealized Appreciation (Depreciation) $ (148) $ 711 (23,791) $ (53,454)
Ending Value 206,593,618   206,593,618  
Dividend Income 1,799,755 2,292,399 3,321,659 4,455,656
Affiliated Investments [Member]        
Investments In And Advances To Affiliates [Line Items]        
Beginning Value 141,414,532 165,260,784 155,007,856 162,850,666
Purchases at Cost 98,646,053 77,473,575 167,369,394 162,773,691
Proceeds from Sales (33,469,524) (74,717,576) (115,752,942) (157,538,522)
Change in Unrealized Appreciation (Depreciation) 2,557   (30,690) (69,052)
Ending Value 206,593,618 168,016,783 206,593,618 168,016,783
Dividend Income 1,799,755 2,292,399 3,321,659 4,455,656
Affiliated Investments [Member] | Money Market Mutual Fund - Invesco Government and Agency Portfolio - Institutional Class [Member]        
Investments In And Advances To Affiliates [Line Items]        
Beginning Value 87,433,379 111,312,879 100,993,456 108,833,709
Purchases at Cost 98,646,053 77,473,575 167,369,394 162,773,691
Proceeds from Sales (33,469,524) (74,717,576) (115,752,942) (157,538,522)
Ending Value 152,609,908 114,068,878 152,609,908 114,068,878
Dividend Income 1,260,082 1,620,697 2,202,252 3,090,140
Affiliated Investments [Member] | Invesco Short Term Treasury ETF [Member]        
Investments In And Advances To Affiliates [Line Items]        
Beginning Value 53,981,153 53,947,905 54,014,400 54,016,957
Change in Unrealized Appreciation (Depreciation) 2,557   (30,690) (69,052)
Ending Value 53,983,710 53,947,905 53,983,710 53,947,905
Dividend Income $ 539,673 $ 671,702 $ 1,119,407 $ 1,365,516