Note 4 - Investments

6 Months Ended

Jun. 30, 2021

Notes to Financial Statements

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

4. Investments

As of June 30, 2021, we had no investments. No marketable securities were sold during the six months ended June 30, 2020.

Certain marketable securities were sold during the six months ended June 30, 2020. The total loss on marketable securities during the six months ended June 30, 2020 was $18,000. The loss for the six months ended June 30, 2020 was due to an unrealized loss of $35,000 and a realized gain of $17,000.