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Marketable Securities | 12 Months Ended
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Dec. 31, 2019
Investments Debt And Equity Securities [Abstract] |
Marketable securities | Note 5 - Marketable securities: Our marketable securities consist of investments in the publicly-traded shares of our immediate parent company Valhi, Inc. Our shares of Valhi common stock are accounted for as available-for-sale securities, which are carried at fair value using quoted market prices in active markets and represent a Level 1 input within the fair value hierarchy. Prior to 2018, any unrealized gains or losses on the securities were recognized through other comprehensive income, net of deferred income taxes. Beginning on January 1, 2018 with the adoption of ASU 2016-01, our marketable equity securities continue to be carried at fair value as noted above, but any unrealized gains or losses on the securities are now recognized in Marketable equity securities on our Consolidated Statements of Operations.
|  | Fair value |  |  |  |  |  |  |  |  |  |  |  |
|  | measurement |  | Market |  |  | Cost |  |  | Unrealized |
|  | level |  | value |  |  | basis |  |  | gain |
|  |  |  | (In thousands) |
December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncurrent assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valhi common stock |  | 1 |  | $ | 27,740 |  |  | $ | 24,347 |  |  | $ | 3,393 |
December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncurrent assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valhi common stock |  | 1 |  | $ | 26,877 |  |  | $ | 24,347 |  |  | $ | 2,530 |
At December 31, 2018 and 2019, we held approximately 14.4 million shares of our immediate parent company, Valhi. See Note 1. At December 31, 2018 and 2019, the quoted market prices of Valhi common stock were $1.93 and $1.87 per share, respectively. The Valhi common stock we own is subject to the restrictions on resale pursuant to certain provisions of the SEC Rule 144. In addition, as a majority-owned subsidiary of Valhi we cannot vote our shares of Valhi common stock under Delaware General Corporation Law, but we do receive dividends from Valhi on these shares, when declared and paid.

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