Quarterly report pursuant to Section 13 or 15(d)

Significant accounting policies (Details)

v2.4.0.8
Significant accounting policies (Details) (USD $)
9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Cash, cash equivalents and short term investments:    
Cash and cash equivalent investment portfolio, percentage 16.00%  
Percentage of any single short-term security held in investment portfolio, maximum 10.00%  
Unrealized gain (loss) on marketable investments $ (115,000) $ 1,329
Realized income (loss) on marketable investments (53,000) (82)
Management fees, marketable securities $ 13,000 $ 2,576
Income (loss) per share:    
Shares not included in the computation of EPS 5,843,000 867,000
Reverse stock split ratio   6