Quarterly report pursuant to Section 13 or 15(d)

Earnings (Loss) Per Share - Narrative (Details)

v3.3.0.814
Earnings (Loss) Per Share - Narrative (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Number of common stock warrant and common stock options exercised 1,595,614 3,556,688 25,437,929 5,262,094
Number of common stock issued for stock warrant and stock options exercised 1,595,461 3,556,602 24,231,123 4,866,852
Shares surrendered in lieu of cash payment 153 86 1,206,807 395,242
Common stock investments, available for sale        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Potential common shares   29,874,112 12,348,652 29,231,538