Note 2 - Investments	9 Months Ended
Sep. 30, 2019
Notes to Financial Statements
Investment [Text Block]	Note 2. Investments At September 30, 2019 and December 31, 2018, the fair value of our non-current investments was $7.3 million and $6.6 million, respectively. Our non-current investments consist of marketable equity securities which are carried at fair value, and are primarily classified as “available-for-sale.” The cost basis of our non-current investments was approximately $9.6 million and $7.7 million at September 30, 2019 and December 31, 2018, respectively. In the first nine months of 2019 and 2018, we acquired marketable equity securities having a cost basis of $2.6 million and $0.8 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. During the first nine months of 2019 and 2018, we recognized $1.2 million and $2.5 million, respectively, in net unrealized losses in current earnings.

Note 2 - Investments

9 Months Ended

Sep. 30, 2019

Note 2. Investments

At September 30, 2019 and December 31, 2018, the fair value of our non-current investments was $7.3 million and $6.6 million, respectively. Our non-current investments consist of marketable equity securities which are carried at fair value, and are primarily classified as “available-for-sale.” The cost basis of our non-current investments was approximately $9.6 million and $7.7 million at September 30, 2019 and December 31, 2018, respectively. In the first nine months of 2019 and 2018, we acquired marketable equity securities having a cost basis of $2.6 million and $0.8 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. During the first nine months of 2019 and 2018, we recognized $1.2 million and $2.5 million, respectively, in net unrealized losses in current earnings.