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Note 19 - Income Taxes - Net Deferred Income Tax Asset (Details) - USD ($) $ in Thousands | Nov. 30, 2021 | Nov. 30, 2020
--- | --- | ---
Depreciation and amortization | $ (412) | $ (270)
Stock compensation | 1,103 | 335
Inventory reserve | 95 | 29
Bad debt reserve | 3 | 3
Accrued payroll | 363 | 183
Warranty reserve | 160 | 90
Foreign tax credit carryforwards | 9 | 0
Unrealized gain/(loss) on investments | 4 | 0
Net operating loss (“NOL”) carryforwards | 5,226 | 5,950
Total deferred tax assets | 6,551 | 6,320
Valuation allowance | (6,551) | (6,320)
Net deferred tax assets (liabilities) | $ 0 | $ 0

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from warranty reserves. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319 + Details
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