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Note 9 - Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of Dividends Payable [Table Text Block] |
Declaration Date |  | Per Common Share |  |  | Amount |  | Payment Date
October 29, 2019 (special) |  | $ | 0.40 |  |  | $ | 4,608 |  | November 29, 2019
January 27, 2019 (special) |  |  | 0.08 |  |  |  | 912 |  | March 15, 2019
January 27, 2019 |  |  | 0.16 |  |  |  | 1,824 |  | March 15, 2019
|  | $ | 0.64 |  |  | $ | 7,344 |  |
Nonvested Restricted Stock Shares Activity [Table Text Block] |
|  | Shares |  |  | Wtd. Avg. Price at Date of Issuance |
Nonvested at December 31, 2018 |  |  | 45,486 |  |  | $ | 21.61 |
Granted |  |  | 1,140,088 |  |  |  | 7.27 |
Vested |  |  | (227,892 | ) |  |  | 9.84 |
Nonvested at December 31, 2019 |  |  | 957,682 |  |  |  | 7.34 |
Vested |  |  | (391,410 | ) |  |  | 7.53 |
Nonvested at December 31, 2020 |  |  | 566,272 |  |  |  | 7.21 |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | Foreign Currency Translation Adjustments |  |  | Unrealized Gains (Losses) on Available-For-Sale Investments |  |  | Total |
Balance, December 31, 2019 |  | $ | (1,245 | ) |  | $ | (19 | ) |  | $ | (1,264 | )
Other comprehensive income |  |  | 920 |  |  |  | 8 |  |  |  | 928 |
Balance, December 31, 2020 |  | $ | (325 | ) |  | $ | (11 | ) |  | $ | (336 | )

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