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Note 9 - Marketable Securities | 6 Months Ended
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Jun. 30, 2018
Notes to Financial Statements |
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] | 9. Marketable Securities Effective January 1, 2018, in accordance with the adoption of ASU 2016 - 01, the Company now recognizes changes in the fair value of equity investments with readily determinable fair values in net income. In addition, the Company recorded a cumulative-effect adjustment of $1.1 million to its beginning retained earnings as of January 1, 2018, which is reflected in Cumulative distributions in excess of net income on the Company’s Condensed Consolidated Statements of Changes in Equity, to reclassify unrealized losses previously reported in AOCI for available-for-sale marketable securities. Also, during the six months ended June 30, 2018, the Company recognized a net loss on changes in fair value of its available-for-sale marketable securities of $0.1 million in Other income, net on the Company’s Condensed Consolidated Statements of Income.

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