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Consolidated Statements of Stockholders' Deficit - USD ($) | Total | Cumulative Effect, Period of Adoption, Adjustment [Member] | Common Stock [Member] | Additional Paid-In Capital [Member] | Treasury Stock [Member] | Other Comprehensive Income [Member] | Other Comprehensive Income [Member] Cumulative Effect, Period of Adoption, Adjustment [Member] | Accumulated Deficit [Member] | Accumulated Deficit [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Nov. 30, 2018 | $ (8,908,298) |  | $ 135,964 | $ 35,515,382 | $ (19,571,113) | $ 340,984 |  | $ (25,329,515) |
Beginning balance (Accounting Standards Update 2016-01 [Member]) at Nov. 30, 2018 |  |  |  |  |  |  | $ (340,984) |  | $ 340,984
Beginning balance (ASC 606 [Member]) at Nov. 30, 2018 |  | $ 253,447 |  |  |  |  |  |  | $ 253,447
Beginning balance, shares at Nov. 30, 2018 |  |  | 13,596,409 |  |  |  |  |  |
Common stock issued | 5,700 |  | $ 25 | 5,675 |  |  |  |  |
Common stock issued, shares |  |  | 2,500 |  |  |  |  |  |
Compensatory element of stock options | 239,983 |  |  | 239,983 |  |  |  |  |
Net income | 1,445,809 |  |  |  |  |  |  | 1,445,809 |
Ending balance at Aug. 31, 2019 | (6,963,359) |  | $ 135,989 | 35,761,040 | (19,571,113) |  |  | (23,289,275) |
Ending balance, shares at Aug. 31, 2019 |  |  | 13,598,909 |  |  |  |  |  |
Beginning balance at May. 31, 2019 | (8,093,792) |  | $ 135,989 | 35,746,866 | (19,571,113) |  |  | (24,405,534) |
Beginning balance, shares at May. 31, 2019 |  |  | 13,598,909 |  |  |  |  |  |
Compensatory element of stock options | 14,174 |  |  | 14,174 |  |  |  |  |
Net income | 1,116,259 |  |  |  |  |  |  | 1,116,259 |
Ending balance at Aug. 31, 2019 | (6,963,359) |  | $ 135,989 | 35,761,040 | (19,571,113) |  |  | (23,289,275) |
Ending balance, shares at Aug. 31, 2019 |  |  | 13,598,909 |  |  |  |  |  |
Beginning balance at Nov. 30, 2019 | (6,952,851) |  | $ 135,989 | 35,918,827 | (20,563,357) |  |  | (22,444,310) |
Beginning balance, shares at Nov. 30, 2019 |  |  | 13,598,909 |  |  |  |  |  |
Common stock issued | 41,000 |  | $ 347 | 40,653 |  |  |  |  |
Common stock issued, shares |  |  | 34,729 |  |  |  |  |  |
Compensatory element of stock options | 450,746 |  |  | 450,746 |  |  |  |  |
Net income | 2,424,771 |  |  |  |  |  |  | 2,424,771 |
Ending balance at Aug. 31, 2020 | (4,036,334) |  | $ 136,336 | 36,410,226 | (20,563,357) |  |  | (20,019,539) |
Ending balance, shares at Aug. 31, 2020 |  |  | 13,633,638 |  |  |  |  |  |
Beginning balance at May. 31, 2020 | (4,982,795) |  | $ 136,336 | 36,248,232 | (20,563,357) |  |  | (20,804,006) |
Beginning balance, shares at May. 31, 2020 |  |  | 13,633,638 |  |  |  |  |  |
Compensatory element of stock options | 161,994 |  |  | 161,994 |  |  |  |  |
Net income | 784,467 |  |  |  |  |  |  | 784,467 |
Ending balance at Aug. 31, 2020 | $ (4,036,334) |  | $ 136,336 | $ 36,410,226 | $ (20,563,357) |  |  | $ (20,019,539) |
Ending balance, shares at Aug. 31, 2020 |  |  | 13,633,638 |  |  |  |  |  |

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