Annual report pursuant to Section 13 and 15(d)

Quarterly Financial Data (Unaudited) (Details)

v3.3.1.900
Quarterly Financial Data (Unaudited) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Quarterly Financial Information [Line Items]                      
Total revenue $ 0 $ 0 $ 760 $ 911 $ 912 $ 911 $ 911 $ 911 $ 1,671 $ 3,646 $ 10,481
Net income (loss) $ (2,294) $ (1,807) $ (2,281) $ (4,897) $ (473) $ 716 $ (842) $ (1,804) $ (11,279) $ (2,403) $ 9,711
Basic net income (loss) per share $ (0.11) $ (0.09) $ (0.11) $ (0.24) $ (0.02) $ 0.04 $ (0.05) $ (0.11) $ (0.56) $ (0.14) $ 0.65
Diluted net income (loss) per share $ (0.11) $ (0.09) $ (0.11) $ (0.24) $ (0.06) $ (0.05) $ (0.05) $ (0.11) $ (0.56) $ (0.2) $ 0.53