Annual report pursuant to Section 13 and 15(d)

Quarterly Financial Data (Unaudited) (Details)

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Quarterly Financial Data (Unaudited) (Details) (USD $)
 3 Months Ended 12 Months Ended
Nov. 30, 2012
Aug. 31, 2012
May 31, 2012
Feb. 28, 2012
Nov. 30, 2011
Aug. 31, 2011
May 31, 2011
Feb. 28, 2011
Nov. 30, 2012
Nov. 30, 2011
Nov. 30, 2010
Summary of quarterly financial data                      
Sales revenue $ 2,216,128 $ 1,927,626 $ 1,439,958 $ 2,437,310 $ 2,161,723       $ 8,021,022 $ 2,161,723  
Lease income 638,243 638,244 638,244 638,244 638,244 425,496     2,552,975 1,063,740  
Total revenue 2,854,371 2,565,870 2,078,202 3,075,554 2,799,967 425,496     10,573,997 3,225,463  
Cost of sales 1,661,155 1,381,161 1,031,114 2,004,672 1,689,374       6,078,102 1,689,374  
Management fees, net of expense reimbursements 246,399 298,051 254,965 247,381 243,923 248,367 241,193 234,680 1,046,796 968,163 925,820
All other expenses 1,117,268 1,082,911 892,759 599,865 746,580 944,404 157,012 153,843 231,086 183,674 244,398
Total expenses 3,024,822 2,762,123 2,178,838 2,851,918 2,679,877 1,192,771 398,205 388,523 10,817,701 4,659,376 1,852,757
Income (loss) from operations, before income taxes (170,451) (196,253) (100,636) 223,636 120,090 (767,275) (398,205) (388,523) (243,704) (1,433,913) (1,852,757)
Realized and unrealized gain (loss) on securities transactions, before income taxes (479,416) 8,492,502 3,237,325 8,931,466 (2,578,087) 2,043,019 4,441,071 677,745      
Distributions and income from investments, net 82,057 (502,176) 55,462 85,262 25,492 (189,001) 253,396 561,786      
Other Income             40,000     40,000 38,580
Interest Expense (11,705) (16,780) (25,229) (27,409) (22,444) (14,064)     (81,123) (36,508) (45,619)
Total other income (loss) and expense, net, before income taxes (409,064) 7,973,546 3,267,558 8,989,319 (2,575,039) 1,839,954 4,734,467 1,239,531 19,821,359 5,238,913 21,292,279
Income (loss) before income taxes (579,515) 7,777,293 3,166,922 9,212,955 (2,454,949) 1,072,679 4,336,262 851,008 19,577,655 3,805,000 19,439,522
Current and deferred tax benefit (expense), net 215,927 (2,788,785) (1,190,162) (3,465,914) 890,171 (482,040) (1,553,250) 262,262 7,228,934 882,857 4,772,648
Net income (loss) $ (363,588) $ 4,988,508 $ 1,976,760 $ 5,747,041 $ (1,564,778) $ 590,639 $ 2,783,012 $ 1,113,270 $ 12,348,721 $ 2,922,143 $ 14,666,874
Basic and diluted earnings per share $ (0.04) $ 0.54 $ 0.21 $ 0.63 $ (0.17) $ 0.07 $ 0.30 $ 0.12 $ 1.34 $ 0.32 $ 1.61