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Stockholders' Equity Stockholders Equity (Details) - USD ($)
9 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Feb. 16, 2017
Treasury Stock, Shares, Acquired 1,190,420    
Treasury Stock Acquired, Average Cost Per Share $ 3.89    
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased 15,366,000    
Stock Repurchase Program Expiration Date Feb. 28, 2019    
Stock Repurchase Program, Number of Shares Authorized to be Repurchased 20,000,000    
Beneficial Ownership Percentage Limit     60.00%
Fair Value of Profits Interest $ 1,422,000 $ 3,041,000 $ 722,000
Geometric Brownian Motion [Member]      
Fair Value Assumptions, Expected Term 4 years    
Finnerty [Member]      
Fair Value Assumptions, Expected Term 4 years    
Minimum [Member] | Geometric Brownian Motion [Member]      
Fair Value Assumptions, Expected Volatility Rate 50.00%    
Fair Value Assumptions, Risk Free Interest Rate 2.00%    
Minimum [Member] | Finnerty [Member]      
Fair Value Inputs, Discount for Lack of Marketability 27.00%    
Term specific volatility 74.00%    
Maximum [Member]      
Fair Value Assumptions, Expected Volatility Rate 50.00%    
Maximum [Member] | Geometric Brownian Motion [Member]      
Fair Value Assumptions, Expected Volatility Rate 70.00%    
Fair Value Assumptions, Risk Free Interest Rate 3.00%    
Maximum [Member] | Finnerty [Member]      
Fair Value Inputs, Discount for Lack of Marketability 30.00%    
Term specific volatility 82.00%    
Veritone [Member] | Minimum [Member]      
Share Price $ 10.43    
Veritone [Member] | Maximum [Member]      
Share Price $ 21.60