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Note 5 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Deferred Tax Assets, Operating Loss Carryforwards, Total | $ 4,144 | $ 3,541
Federal Research and Development Credit | 240 | 240
Deferred revenue | 330 |
Accrued payroll | 217 |
Payroll taxes payable | 100 | 457
Outside basis in domestic partnership | 92 | 92
Allowance for doubtful accounts and other receivable | 93 | 98
Share-based compensation expense | 407 | 434
Depreciation | 156 | 16
Lease liabilities | 453 | 782
Other | 343 | 315
Valuation allowance | (478) | (397)
Total deferred tax assets | 6,097 | 6,023
Goodwill & Intangible assets of subsidiaries | 700 | 558
Capitalized software development costs | 476 | 482
Right To use assets | 453 | 782
Total deferred tax liabilities | 1,629 | 1,822
Net deferred taxes | $ 4,468 | $ 4,201

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