Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Weighted Average Assumptions (Details)

v3.8.0.1
Stock-based Compensation - Weighted Average Assumptions (Details) - Stock Options [Member]
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Stock-based awards weighted average assumptions [Abstract]        
Dividend yield 0.00% 0.00% 0.00% 0.00%
Expected volatility 100.00% 102.00% 100.00% 103.00%
Risk-free interest rate 1.88% 1.13% 1.79% 1.14%
Expected term 5 years 7 months 7 days 5 years 7 months 7 days 5 years 7 months 7 days 5 years 7 months 7 days