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Quarterly Results (Details) - USD ($)
3 Months Ended 12 Months Ended 107 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Quarterly Financial Information [Line Items]                      
Revenue $ 361,000 $ 260,000 $ 0 $ 0 $ 61,000 $ 0 $ 0 $ 0 $ 621,000 $ 61,000  
Gross Profit (Loss) (77,000) 213,000 0 0 11,000 0 0 0 136,000 11,000  
Operating expenses 2,232,000 4,066,000 2,442,000 2,601,000 2,582,000 1,969,000 1,810,000 1,592,000 11,341,000 7,953,000  
Net Loss $ (2,306,000) $ (3,846,000) $ (2,431,000) $ (2,589,000) $ (2,558,000) $ (1,961,000) $ (1,796,000) $ (1,583,000) $ (11,173,000) $ (7,898,000) $ 40,331,000
Net Loss per share - basic and fully diluted (in dollars per share) $ (0.17) $ (0.30) $ (0.19) $ (0.20) $ (0.20) $ (0.15) $ (0.14) $ (0.14) $ (0.86) $ (0.63)