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Note 5 - Marketable Securities | 6 Months Ended
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Jun. 30, 2020
Notes to Financial Statements |
Cash, Cash Equivalents, and Marketable Securities [Text Block] | NOTE 5: MARKETABLE SECURITIES The following is a summary of available-for-sale marketable securities:
|  | June 3 0, 20 20 (Unaudited) |
|  | Amortized cost |  |  | Gross unrealized gains |  |  | Gross unrealized losses |  |  | Fair value |
Available-for-sale - matures within one year: |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | 16,772 |  |  | $ | 62 |  |  | $ | (27 | ) |  | $ | 16,807 |
|  |  | 16,772 |  |  |  | 62 |  |  |  | (27 | ) |  |  | 16,807 |
Available-for-sale - matures after one year through five years: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  |  | 50,272 |  |  |  | 547 |  |  |  | (333 | ) |  |  | 50,486 |
|  |  | 50,272 |  |  |  | 547 |  |  |  | (333 | ) |  |  | 50,486 |
Total |  | $ | 67,044 |  |  | $ | 609 |  |  | $ | (360 | ) |  | $ | 67,293 |
|  | December 31, 201 9 |
|  | Amortized cost |  |  | Gross unrealized gains |  |  | Gross unrealized losses |  |  | Fair value |
Available-for-sale - matures within one year: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | 18,224 |  |  | $ | 16 |  |  | $ | (11 | ) |  | $ | 18,229 |
|  |  | 18,224 |  |  |  | 16 |  |  |  | (11 | ) |  |  | 18,229 |
Available-for-sale - matures after one year through five years: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  |  | 46,593 |  |  |  | 168 |  |  |  | (123 | ) |  |  | 46,638 |
|  |  | 46,593 |  |  |  | 168 |  |  |  | (123 | ) |  |  | 46,638 |
Total |  | $ | 64,817 |  |  | $ | 184 |  |  | $ | (134 | ) |  | $ | 64,867 |
The following table presents gross unrealized losses and fair values for those investments that were in an unrealized loss position as of June 30, 2020 and December 31, 2019, and the length of time that those investments have been in a continuous loss position:
|  | Less than 12 months |  |  | 12 months or greater |
|  | Fair value |  |  | Gross unrealized loss |  |  | Fair value |  |  | Gross unrealized loss |
As of June 30, 2020 (unaudited) |  | $ | 28,365 |  |  | $ | (340 | ) |  | $ | 2,974 |  |  | $ | (20 | )
As of December 31, 2019 |  | $ | 22,852 |  |  | $ | (102 | ) |  | $ | 14,231 |  |  | $ | (32 | )
As of June 30, 2020, the allowance for credit losses was not material. The following table presents gross realized gains and losses from sale of available-for-sale marketable securities:
|  | Six months ended June 30, |  |  | Three months ended June 3 0, |
|  | 20 20 |  |  | 201 9 |  |  | 20 20 |  |  | 201 9 |
|  | (unaudited) |  |  | (unaudited) |  |  | (unaudited) |  |  | (unaudited) |
Gross realized gains from sale of available-for-sale marketable securities |  | $ | 4 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Gross realized losses from sale of available-for-sale marketable securities |  | $ | (19 | ) |  | $ | (35 | ) |  | $ | (13 | ) |  | $ | (11 | )

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- Definition The entire disclosure of cash, cash equivalents, and debt and equity securities, including any unrealized or realized gain (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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