v3.26.3
Earnings per Share - Earnings Per Share, Basic and Diluted (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Accounting Policies [Abstract]    
Net loss attributable to Great Elm Group, Inc. stockholders $ (4,146) $ (7,030)
Effect of dilutive securities:    
Interest expense associated with Convertible Notes 0 0
Numerator for diluted EPS - Net loss attributable to Great Elm Group, Inc. stockholders after the effect of dilutive securities $ (4,146) $ (7,030)
Denominator:    
Denominator for basic EPS - Weighted average shares of common stock outstanding 29,735 28,972
Effect of dilutive securities:    
Restricted stock 0 0
Convertible Notes 0 0
Denominator for diluted EPS - Weighted average shares of common stock outstanding after the effect of dilutive securities 29,735 28,972
Net loss attributable to stockholders per share    
Basic $ (0.14) $ (0.24)
Diluted $ (0.14) $ (0.24)