XML 48 R32.htm IDEA: XBRL DOCUMENT v3.20.4
FINANCIAL HIGHLIGHTS (Details) - $ / shares
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Per Share Operating Performance:      
Net asset value, beginning of year $ 20.91 $ 15.18 $ 18.18
Total income (loss) (7.90) 5.90 (2.82)
Total expenses (0.10) (0.17) (0.18)
Net increase (decrease) in net asset value (8.00) 5.73 (3.00)
Net asset value, end of year $ 12.91 $ 20.91 $ 15.18
Total Return (38.26%) 37.75% (16.50%)
Ratios to Average Net Assets      
Total income (loss) 42.40% 31.50% (14.88%)
Management fees 0.75% 0.75% 0.75%
Expenses excluding management fees 0.38% 0.24% 0.23%
Expense waived (0.23%) (0.09%) (0.08%)
Net expense excluding management fees 0.15% 0.15% 0.15%
Net income (loss) 41.50% 30.60% (15.78%)