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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 |  |

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