0001675033 gecc:CommonStockParValue001PerShareMember 2026-08-05 2026-08-05 0001675033 gecc:NotesDue2029Member 2026-08-05 2026-08-05 0001675033 gecc:NotesDue2030Member 2026-08-05 2026-08-05 0001675033 gecc:NoteDue2029Member 2026-08-05 2026-08-05 0001675033 2026-08-05 2026-08-05 false 0001675033 8-K 2026-08-05 Great Elm Capital Corp. MD 814-01211 81-2621577 3801 PGA Boulevard, Suite 603 Palm Beach Gardens FL 33410 617 375-3006 false false false false Common stock, par value $0.01 per share GECC NASDAQ 8.50% Notes due 2029 GECCI NASDAQ 8.125% Notes due 2029 GECCH NASDAQ 7.75% Notes due 2030 GECCG NASDAQ false