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Note 4 - Fair Value Measurements (Tables) | 6 Months Ended
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Jun. 30, 2020
Notes Tables |
Fair Value, Assets Measured on Recurring Basis [Table Text Block] |
|  |  |  |  |  | Fair Value Measurements at Reporting Date Using |  |  |  |  |
|  |  |  |  |  | Quoted Prices in Active Markets |  |  | Significant Other |  |  | Significant |  |  |  |  |
|  |  |  |  |  | for Identical Assets |  |  | Observable Inputs |  |  | Unobservable Inputs |  |  |  |  |
|  | June 30, 2020 |  |  | (Level 1) |  |  | (Level 2) |  |  | (Level 3) |  |  | Amortized Cost |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 49,357 |  |  | $ | 49,357 |  |  | $ | - |  |  | $ | - |  |  | $ | 49,357 |
Investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bank certificates of deposit |  | $ | 7,514 |  |  | $ | - |  |  | $ | 7,514 |  |  | $ | - |  |  | $ | 7,524 |
U.S. treasury bills |  |  | 20,110 |  |  |  | 20,110 |  |  |  | - |  |  |  | - |  |  |  | 20,178 |
Total investments |  | $ | 27,624 |  |  | $ | 20,110 |  |  | $ | 7,514 |  |  | $ | - |  |  | $ | 27,702 |
Other current and long-term liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration- short term |  | $ | 11,688 |  |  | $ | - |  |  | $ | - |  |  | $ | 11,688 |  |  | $ | - |
Contingent consideration- long term |  |  | 37,062 |  |  |  | - |  |  |  | - |  |  |  | 37,062 |  |  |  | - |
Total other current and long-term liabilities |  | $ | 48,750 |  |  | $ | - |  |  | $ | - |  |  | $ | 48,750 |  |  | $ | - |
|  |  |  |  |  | Fair Value Measurements at Reporting Date Using |  |  |  |  |
|  |  |  |  |  | Quoted Prices in Active Markets |  |  | Significant Other |  |  | Significant |  |  |  |  |
|  |  |  |  |  | for Identical Assets |  |  | Observable Inputs |  |  | Unobservable Inputs |  |  |  |  |
|  | December 31, 2019 |  |  | (Level 1) |  |  | (Level 2) |  |  | (Level 3) |  |  | Amortized Cost |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money Market Funds |  | $ | 48,971 |  |  | $ | 48,971 |  |  | $ | - |  |  | $ | - |  |  | $ | 48,971 |
Investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury Bills |  | $ | 27,480 |  |  | $ | 27,480 |  |  | $ | - |  |  | $ | - |  |  | $ | 27,479 |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
|  | Six Months Ended |
|  | June 30, 2020 |
Balance, beginning January 1, 2020 |  | $ | - |
Additions |  |  | 69,076 |
Payments |  |  | - |
Change in fair value |  |  | (20,326 | )
Balance, ending June 30, 2020 |  | $ | 48,750 |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258 + Details
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