Note 2 - Investments	9 Months Ended
Sep. 30, 2020
Notes to Financial Statements
Investment [Text Block]	Note 2. Investments At September 30, 2020 and December 31, 2019, the fair value of our non-current investments was $17.4 million and $6.2 million, respectively. Our non-current investments consist of marketable equity securities which are carried at fair value. The cost basis of our non-current investments was approximately $11.3 million and $9.8 million at September 30, 2020 and December 31, 2019, respectively. During the first nine months of 2020 and 2019, we recognized $9.4 million in net unrealized gains and $1.2 million in net unrealized losses, respectively, in current earnings. During the nine months ended September 30, 2020 and 2019, we acquired marketable equity securities having a cost basis of $1.7 million and $0.4 million, respectively. In the first nine months of 2019, we sold marketable equity securities having a cost basis of $0.9 million for proceeds of $1.8 million, resulting in a gain of $0.9 million.

Note 2 - Investments

9 Months Ended

Sep. 30, 2020

Note 2. Investments

At September 30, 2020 and December 31, 2019, the fair value of our non-current investments was $17.4 million and $6.2 million, respectively. Our non-current investments consist of marketable equity securities which are carried at fair value. The cost basis of our non-current investments was approximately $11.3 million and $9.8 million at September 30, 2020 and December 31, 2019, respectively. During the first nine months of 2020 and 2019, we recognized $9.4 million in net unrealized gains and $1.2 million in net unrealized losses, respectively, in current earnings. During the nine months ended September 30, 2020 and 2019, we acquired marketable equity securities having a cost basis of $1.7 million and $0.4 million, respectively. In the first nine months of 2019, we sold marketable equity securities having a cost basis of $0.9 million for proceeds of $1.8 million, resulting in a gain of $0.9 million.