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Employee Service Share-based Compensation, Awards with Market Conditions, Compensation Cost Not yet Recognized

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Fair Value of Profits Interest

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Ownership Percent of Voting Stock

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Share-based Compensation Arrangement by Share-based Payment Award, Restricted Stock Units, Vested in Period, Fair Value

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- Definition

Aggregate number of common shares reserved for future issuance.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

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Risk-free interest rate assumption used in valuing an instrument.

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Adjustment to the discount rate used to measure fair value for lack of ability to convert business interests into cash quickly.

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Price of a single share of a number of saleable stocks of a company.

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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

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Stock-Based Incentive Plans (Details) - USD ($)	9 Months Ended	12 Months Ended
Stock-Based Incentive Plans (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Feb. 16, 2017	Apr. 26, 2016	Jan. 02, 2015
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value		$ 2,009,000	$ 2,342,000
Employee Service Share-based Compensation, Awards with market Cond, Compensation Cost Not yet Recognized		0
Non-cash stock compensation		$ 8,885,000	$ 9,062,000	$ 11,048,000
Share-based Compensation Arrangement by Share-based Payment Award, Restricted Stock Units, Grants in Period, Weighted Average Grant Date Fair Value		$ 0.00	$ 16.72
Share-based Compensation Arrangement by Share-based Payment Award, Restricted Stock Units, Vested in Period, Fair Value		$ 200,000	$ 324,000	480,000
Ownership percent of voting stock		10.00%
Aggregate intrinsic value of options exercised		$ 296,000	344,000	$ 751,000
Weighted average grant date fair value of restricted stock granted		$ 0.00
Number of shares of common stock reserved for issuance		7,279,000
Beneficial Ownership Percentage Limit		4.90%			60.00%
Fair Value of Profits Interest		$ 3,041,000			$ 722,000
Share Price				$ 4.29			$ 16.72
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Total unrecognized compensation expense for nonvested awards		$ 3,654,000
Weighted average period over which unrecognized compensation expense will be recognized		2 years
Restricted stock awards with time based vesting conditions [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Non-cash stock compensation		$ 1,025,000	$ 4,071,000	$ 10,575,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Weighted average grant date fair value of restricted stock granted			$ 3.12	$ 12.83
Aggregate fair value of restricted stock vested		1,560,000	$ 5,243,000	$ 11,494,000
Total unrecognized compensation expense for nonvested awards		$ 53,000
Weighted average period over which unrecognized compensation expense will be recognized		2 months
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Total unrecognized compensation expense for nonvested awards		$ 1,000
Weighted average period over which unrecognized compensation expense will be recognized		1 month
Restricted stock unit awards with time-based vesting conditions [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Non-cash stock compensation		$ 161,000	320,000	473,000
Restricted stock unit awards with performance based vesting conditions [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Non-cash stock compensation		121,000	197,000	0
Stock options with time-based vesting conditions [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Non-cash stock compensation		2,165,000	1,316,000	0
Stock options with market-based vesting conditions [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Non-cash stock compensation		2,372,000	3,158,000	0
Stock options with performance-based vesting conditions [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Non-cash stock compensation		0	0	0
Deferred Profit Sharing [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Non-cash stock compensation		$ 3,041,000	$ 0	$ 0
2007 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Number of shares available for grant		0
2016 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Aggregate shares available for issuance						4,500,000
Number of shares available for grant		727,000
Discretionary Option Grant Program [Member] \| Nonstatutory Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Percentage of fair market value on grant date, minimum exercise price		85.00%
Stock Issuance Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Percentage of fair market value on grant date, minimum exercise price		100.00%
2013 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Aggregate shares available for issuance						4,750,000
Number of shares available for grant		660,000
2013 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Number of shares available for grant						625,390
Less than 10% [Member] \| Discretionary Option Grant Program [Member] \| Incentive Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Percentage of fair market value on grant date, minimum exercise price		100.00%
10% or More [Member] \| Discretionary Option Grant Program [Member] \| Incentive Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Percentage of fair market value on grant date, minimum exercise price		110.00%
Geometric Brownian Motion [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Fair Value Assumptions, Expected Term		4 years 5 months
Fair Value Assumptions, Expected Volatility Rate		50.00%
Finnerty - Profits Interests [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Term specific volatility		85.00%
Fair Value Inputs, Discount for Lack of Marketability		30.00%
Minimum [Member] \| Geometric Brownian Motion [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Fair Value Assumptions, Expected Term	1 year
Fair Value Assumptions, Risk Free Interest Rate		2.00%
Minimum [Member] \| Veritone [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Share Price		$ 23.20
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Fair Value Assumptions, Expected Volatility Rate		50.00%
Maximum [Member] \| Geometric Brownian Motion [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Fair Value Assumptions, Expected Term	10 years
Fair Value Assumptions, Risk Free Interest Rate		2.00%