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, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share (in shares) 332 1,475 5,052 1,464
Convertible Preferred Stock (as Converted) [Member]        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share (in shares)     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) 313 558 753 549
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) 19 917 139 915