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Common Stock Equivalents Excluded From Diluted Net Loss Per Share (Details) - shares
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Common stock equivalents diluted net loss per share inclusion anti-dilutive 7,993,897 6,274,624
RSUs    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Common stock equivalents diluted net loss per share inclusion anti-dilutive 1,430,232 1,542,490
Stock Options    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Common stock equivalents diluted net loss per share inclusion anti-dilutive 575,602 661,852
Warrants    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Common stock equivalents diluted net loss per share inclusion anti-dilutive 705,000 765,000
Noncontrolling Interest    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Common stock equivalents diluted net loss per share inclusion anti-dilutive 10,355 10,355
Shares of Common Stock Issuable upon Conversion of Series B Preferred Stock    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Common stock equivalents diluted net loss per share inclusion anti-dilutive 5,272,708 3,000,000
Shares of Common Stock Subject to Holdback Provisions of Acquisition of 3VR    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Common stock equivalents diluted net loss per share inclusion anti-dilutive   294,927