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Investment Securities (Notes) | 6 Months Ended
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Jun. 30, 2020
Investments, Debt and Equity Securities [Abstract] |
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] | Investment Securities Our investment securities currently consist of short-term corporate bonds. Our investment securities are considered available-for-sale and are “investment grade” and carried at fair value. Available-for-sale securities are recorded at fair value, and unrealized holding gains and losses are recorded, net of tax, as a component of accumulated other comprehensive income. Unrealized losses on available-for-sale securities are charged against net earnings when a decline in fair value is determined to be other than temporary. Our management reviews several factors to determine whether a loss is other than temporary, such as the length and extent of the fair value decline, the financial condition and near term prospects of the issuer, and for equity investments, our intent and ability to hold the security for a period of time sufficient to allow for any anticipated recovery in fair value. The amortized cost of the debt securities are adjusted for the amortization of premiums computed under the effective interest method. Such amortization is included in investment income in other income (expense), net on our condensed consolidated statements of operations. There have been no realized gains or losses on their disposal. Realized gains and losses are accounted for on the specific identification method. The scheduled maturities of the debt securities are between 2020 and 2021. All short-term investment securities are callable within one year. Our short investment securities consisted of the following (in thousands):
| As of June 30, 2020 |  |  |  |
| Amortized Cost |  | Unrealized Holding Gains (Losses) |  | Fair Value
Short-term corporate bonds | $ | 14,564 |  |  | $ | — |  |  | $ | 14,564 |
| As of December 31, 2019 |  |  |  |
| Amortized Cost |  | Unrealized Holding Gains (Losses) |  | Fair Value
Short-term corporate bonds | $ | 23,967 |  |  | $ | — |  |  | $ | 23,967 |

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 + Details
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