Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Weighted Average Assumptions (Details)

v3.10.0.1
Stock-based Compensation - Weighted Average Assumptions (Details) - Stock Options [Member]
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Stock-based awards weighted average assumptions [Abstract]        
Dividend yield 0.00% 0.00% 0.00% 0.00%
Expected volatility 102.00% 100.00% 101.00% 100.00%
Risk-free interest rate 2.98% 1.78% 2.71% 1.78%
Expected term 5 years 6 months 18 days 5 years 6 months 18 days 5 years 7 months 6 days 5 years 6 months 18 days