XML 109 R91.htm IDEA: XBRL DOCUMENT v3.7.0.1
Equity Instruments and Stock Based Compensation - Fair Value Assumptions (Details)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Warrant      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected term (years) 2 years 6 months 2 years 6 months 2 years 6 months
Expected volatility 60.57% 55.00% 58.00%
Risk-free interest rate 0.82% 0.89% 0.75%
Expected dividend yield 0.00% 0.00% 0.00%
Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected term (years) 6 years 3 months 6 years 3 months 6 years 3 months
Expected volatility 58.39% 58.59% 59.00%
Risk-free interest rate 2.04% 1.89% 1.79%
Expected dividend yield 0.00% 0.00% 0.00%