Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Financial Statements Detail - Outstanding Securities Considered Anti-Dilutive (Details)

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Condensed Consolidated Financial Statements Detail - Outstanding Securities Considered Anti-Dilutive (Details) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share (in shares) 6,671 332 6,662 5,052
Convertible Preferred Stock [Member]        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share (in shares) 5,003   5,003 4,160
Common Stock Options and RSUs [Member]        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share (in shares) 1,644 313 1,638 753
Warrants for Common Stock [Member]        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share (in shares) 24 19 21 139