Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details)

v3.7.0.1
Income Taxes (Details)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Percent of pre-tax income:    
U.S. federal statutory income tax rate 34.00% 34.00%
Permanent items (3.90%) (5.30%)
Research and development credit 3.40% 3.00%
Change in valuation allowance (33.50%) (31.70%)
Effective income tax rate 0.00% 0.00%