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v3.21.2

Note 2 - Cash, Cash Equivalents and Restricted Cash (Tables) | 6 Months Ended
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Jun. 30, 2021
Notes Tables |
Restrictions on Cash and Cash Equivalents [Table Text Block] |
|  | June 30, |  |  | December 31, |
|  | 2021 |  |  | 2020 |
Cash and cash equivalents |  | $ | 188,581 |  |  | $ | 209,575 |
Restricted cash |  |  | 1,776 |  |  |  | 1,672 |
Total cash, cash equivalents and restricted cash shown in the statements of cash flows |  | $ | 190,357 |  |  | $ | 211,247 |

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