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Note 13 - Subsequent Events (Details Textual) - USD ($) $ in Thousands | 1 Months Ended |
--- | --- | ---
Apr. 30, 2022 | Mar. 31, 2022 | Aug. 17, 2021
Promissory Note Issued for Acquisition of Baltimore Property in Baltimore, MD [Member] | Majority Owned Subsidiary, PPT Baltimore [Member] |  |  |
Debt Instrument, Face Amount |  |  | $ 1,560
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.00%
Refinanced PPT Baltimore Promissory Note [Member] |  |  |
Proceeds from Short-Term Debt, Total |  | $ 5,670 |
Refinanced PPT Baltimore Promissory Note [Member] | Subsequent Event [Member] |  |  |
Proceeds from Short-Term Debt, Total | $ 3,700 |  |
Repayments of Short-Term Debt, Total | $ 1,560 |  |

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