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Note 8 - Share-based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2021
Notes Tables |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
Issuance Date |  | February 1, 2019 |  |  | December 20, 2019 |  |  | March 1, 2020 |  |  | March 1, 2021 |
Fair value lower range |  | $ | 2.81 |  |  | $ | 1.58 |  |  | $ | 1.46 |  |  | $ | 4.34 |
Fair value higher range |  | $ | 2.86 |  |  | $ | 1.61 |  |  | $ | 1.49 |  |  | $ | 4.43 |
Exercise price |  | $ | 4.72 |  |  | $ | 2.56 |  |  | $ | 2.33 |  |  | $ | 6.33 |
Expected term (in years) |  |  | 1.0 - 1.3 |  |  |  | 1.0 - 1.6 |  |  |  | 1.0 - 1.5 |  |  |  | 1.0 - 1.3 |
Expected volatility |  |  | 65 | % |  |  | 70 | % |  |  | 70 | % |  |  | 80 | %
Dividend yield |  |  | — | % |  |  | — | % |  |  | — | % |  |  | — | %
Risk-free rate |  |  | 2.61 | % |  |  | 1.85 | % |  |  | 1.05 | % |  |  | 1.18 | %
Share-based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Number of options |  |  | Weighted average exercise price per share |  |  | Weighted average remaining contractual term (in years) |  |  | Aggregate intrinsic value |
Outstanding as of December 31, 2020 |  |  | 2,294,000 |  |  | $ | 4.34 |  |  |  | 8.0 |  |  | $ | 2,256 |
Granted |  |  | 108,000 |  |  | $ | 6.33 |  |  |  | 9.7 |  |  |  | — |
Exercised |  |  | (198,000 | ) |  |  |  |  |  |  |  |  |  |  |  |
Outstanding as of September 30, 2021 |  |  | 2,204,000 |  |  | $ | 4.41 |  |  |  | 7.4 |  |  | $ | — |
Options exercisable as of September 30, 2021 |  |  | 1,307,000 |  |  | $ | 4.06 |  |  |  | 7.2 |  |  | $ | — |
Schedule of Nonvested Share Activity [Table Text Block] |
|  | Number of options |  |  | Weighted average exercise price per share |  |  | Weighted average remaining contractual term (in years) |
Unvested as of December 31, 2020 |  |  | 1,225,000 |  |  | $ | 3.93 |  |  |  | 8.4 |
Granted |  |  | 108,000 |  |  | $ | 6.33 |  |  |  | 9.7 |
Vested |  |  | (436,000 | ) |  |  |  |  |  |  |  |
Unvested as of September 30, 2021 |  |  | 897,000 |  |  | $ | 4.91 |  |  |  | 7.6 |
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] |
|  | Number of units |  |  | Weighted average grant-date fair value |
Unvested as of December 31, 2020 |  |  | 3,377,097 |  |  | $ | 7.09 |
Granted |  |  | 1,684,061 |  |  | $ | 4.67 |
Vested and delivered |  |  | (2,381,364 | ) |  | $ | 2.93 |
Withheld as treasury stock (1) |  |  | (143,913 | ) |  | $ | 4.71 |
Vested not delivered (2) |  |  | 570,335 |  |  | $ | 2.70 |
Forfeited |  |  | (291,428 | ) |  | $ | 4.57 |
Unvested as of September 30, 2021 |  |  | 2,814,788 |  |  | $ | 8.64 |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Sales and marketing |  | $ | 188 |  |  | $ | 172 |  |  | $ | 560 |  |  | $ | 659 |
Product development |  |  | 167 |  |  |  | 291 |  |  |  | 668 |  |  |  | 814 |
General and administrative |  |  | 790 |  |  |  | 707 |  |  |  | 2,349 |  |  |  | 3,375 |
Share-based compensation expense |  |  | 1,145 |  |  |  | 1,170 |  |  |  | 3,577 |  |  |  | 4,848 |
Capitalized in intangible assets |  |  | 23 |  |  |  | 34 |  |  |  | 94 |  |  |  | 120 |
Total share-based compensation |  | $ | 1,168 |  |  | $ | 1,204 |  |  | $ | 3,671 |  |  | $ | 4,968 |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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