XML 31 R43.htm IDEA: XBRL DOCUMENT v3.3.0.814
Note 7 - Investments in Marketable Securities (Details Textual) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities $ 0   $ 0
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 81,966,000   103,814,000
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax 1,234,000   $ 824,000
Proceeds from Sale and Maturity of Marketable Securities 39,601,000 $ 27,641,000  
Realized Investment Gains (Losses) $ 449,000 $ 172,000