Quarterly report pursuant to Section 13 or 15(d)

Investments (Details 2)

v3.5.0.2
Investments (Details 2) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]      
Proceeds from the sales of available-for-sale securities $ 0 $ 0  
Trading securities portfolio 1,275,000   $ 1,044,000
Gains on trading securities 35,000 $ 21,000  
Gross Unrealized Gains 4,000   0
Gross Unrealized Losses 0   (22,000)
Securities in a loss position for more than 12 months 0   0
U.S. government security funds      
Schedule of Available-for-sale Securities [Line Items]      
Gross Unrealized Gains 4,000   0
Gross Unrealized Losses $ 0   $ (22,000)