Annual report pursuant to Section 13 and 15(d)

Selected Quarterly Financial Data (Details)

v3.10.0.1
Selected Quarterly Financial Data (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
[1]
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Selected Quarterly Financial Information [Line Items]                    
Loss from operations $ (3,258) $ (4,320) $ (5,003) $ (4,990) $ (5,783) $ (5,842) $ (6,475) $ (8,149)    
Net (loss) income $ (3,193) $ (3,689) $ (4,214) $ (2,326) $ 2,812 $ (10,930) $ (4,315) $ (3,058) $ (13,367) $ (15,174)
Net (loss) income per share - basic $ (1.12) $ (0.93) $ (1.05) $ (0.70) $ 0.76 $ (4.90) $ (1.05) $ (0.70)    
Net (loss) income per share - dilutive $ (1.12) $ (0.93) $ (1.05) $ (0.70) $ 0.76 $ (4.90) $ (1.05) $ (0.70)    
Weighted average common share - basic 13,442,104 4,028,304 3,683,384 3,673,340 3,673,340 3,665,134 3,514,435 3,355,636    
Weighted average common share - dilutive 13,442,104 4,028,304 3,683,384 3,673,340 3,673,340 3,665,134 3,514,435 3,355,636    
[1] Net Income due to gain on remeasurement of the warrant liabilities in excess of the quarter to date loss.