XML 68 R55.htm IDEA: XBRL DOCUMENT v3.3.1.900
Income Taxes - Effective Tax Rate (Details)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Taxes - Effective Tax Rate Details      
U.S. federal statutory income tax rate (34.00%) (34.00%) (34.00%)
State taxes, net of federal tax benefit (2.93%) (3.20%) (3.80%)
Permanent differences 0.11% 0.00% 0.00%
Rate differential 0.42% 0.00% 0.00%
Unrecognized tax benefits 0.40% 0.00% 0.00%
Nondeductible equity and other compensation 2.86% 3.70% 1.20%
Limitation on net operating losses due to §382 0.00% 0.50% 1.00%
Credit for increased research activities (2.67%) (0.80%) (3.20%)
Change in Valuation allowance 35.81% 33.80% 38.80%
Effective Income Tax Rate 0.00% 0.00% 0.00%