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Investments (Details) - USD ($) |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
May 17, 2017 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Sep. 30, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Mar. 14, 2017 | Aug. 15, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Equity Method Investments |  |  |  |  |  |  |  |  |  |  | $ (220,000) | $ 0 | $ 0 |  |
Cash Paid for Investment |  |  |  |  |  |  |  |  |  |  | 2,250,000 |  |  |  |
Assets, Current |  | $ 139,695,000 |  |  |  | $ 188,490,000 |  |  |  |  | 139,695,000 | 188,490,000 |  |  |
Revenues |  | $ 3,458,000 | $ 36,633,000 | $ 16,457,000 | $ 8,854,000 | 21,969,000 | $ 64,658,000 | $ 41,351,000 | $ 24,721,000 |  |  |  |  |  |
Gain on Conversion of Loan and Accrued Interest |  |  |  |  |  |  |  |  |  |  | 2,671,000 | 0 | 0 |  |
Gain on exercise of Primary Warrant |  |  |  |  |  |  |  |  |  |  | 4,616,000 | 0 | 0 |  |
Change in fair value of investment |  |  |  |  |  |  |  |  |  |  | $ 42,239,000 | 0 | 0 |  |
Percentage of ownership, Veritone | 20.00% | 23.00% |  |  |  |  |  |  |  |  | 23.00% |  |  |  |
First Loan Warrant |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 700,000
Time-sharing Transactions, Stated Interest Rate for Notes Receivable |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.00%
Maximum Investment in Veritone |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 50,000,000
Secured Promissory Note Advance |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,000,000
Veritone Primary Warrant |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50,000,000
Secured Convertible Promissory Note |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 20,000,000
Unamortized loan discount | $ 1,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment Income, Interest |  |  |  |  |  |  |  |  |  |  | $ 1,605,000 | 798,000 | $ (56,000) |  |
Loan receivable and accrued interest | $ 20,700,000 | $ 0 |  |  |  | 18,616,000 |  |  |  |  | 0 | 18,616,000 |  |  |
Investment warrants |  | 0 |  |  |  | 1,960,000 |  |  |  |  | 0 | 1,960,000 |  |  |
Accretion (Amortization) of Discounts and Premiums, Investments |  |  |  |  |  |  |  |  |  |  | 630,000 |  |  |  |
Loss on fair value investment net |  |  |  |  |  |  |  |  |  |  | 49,526,000 |  |  |  |
Assets |  | 308,768,000 |  |  |  | 296,003,000 |  |  |  |  | 308,768,000 | 296,003,000 |  |  |
Liabilities, Current |  | 9,557,000 |  |  |  | 28,191,000 |  |  |  |  | 9,557,000 | 28,191,000 |  |  |
Liabilities |  | 13,109,000 |  |  |  | 28,560,000 |  |  |  |  | 13,109,000 | 28,560,000 |  |  |
Stockholders' Equity Attributable to Parent |  | $ 294,301,000 |  |  |  | $ 265,589,000 |  |  |  |  | $ 294,301,000 | $ 265,589,000 |  |  |
Common stock, shares outstanding |  | 50,639,926 |  |  |  | 50,476,042 |  |  |  |  | 50,639,926 | 50,476,042 |  |  |
Debt Instrument, Convertible, Conversion Price | $ 13.6088 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash paid for primary warrant exercise | $ 29,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
10% Warrant | 809,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bridge Loan | $ 4,000,000 |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,000,000 |
Bridge loan stated interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 8.00% |
Veritone Bridge Loan Advance 1 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000,000 |
Veritone Bridge Loan Advance 3 and 4 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,000,000 |
Upfront Shares |  |  |  |  |  |  |  |  |  |  |  |  |  | 60,000 |
Bridge Installment Shares |  |  |  |  |  |  |  |  |  |  |  |  |  | 90,000 |
Bridge Warrant Share |  |  |  |  |  |  |  |  |  |  |  |  |  | 157,000 |
Investments at fair value |  | $ 104,754,000 |  |  |  | $ 0 |  |  |  |  | $ 104,754,000 | $ 0 |  |  |
Equity Method Investment, Ownership Percentage |  | 23.00% |  |  |  |  |  |  |  |  | 23.00% |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Receivable with Imputed Interest, Effective Yield (Interest Rate) |  |  |  |  |  |  |  |  |  |  | 53.00% |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |
Fair Value Inputs, Probability of Default |  |  |  |  |  |  |  |  |  |  | 75.00% |  |  |  |
Fair value inputs recovery |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Receivable with Imputed Interest, Effective Yield (Interest Rate) |  |  |  |  |  |  |  |  |  |  | 9.00% |  |  |  |
Monte Carlo [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  |  |  |  |  |  |  |  |  | 40.00% |  |  |  |  |
Fair Value Inputs, Discount for Lack of Marketability |  |  |  |  |  |  |  |  |  |  | 7.00% |  |  |  |
Fair Value Inputs, Probability of Default |  |  |  |  |  |  |  |  |  |  | 25.00% |  |  |  |
Finnerty - Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate | 35.00% |  |  |  |  |  |  |  |  |  | 37.00% |  |  |  |
Fair Value Inputs, Discount for Lack of Marketability | 6.00% |  |  |  |  |  |  |  |  |  | 5.00% |  |  |  |
Fair Value Assumptions, Expected Term | 6 months |  |  |  |  |  |  |  |  |  | 2 months |  |  |  |
Finnerty - Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate | 35.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Discount for Lack of Marketability | 6.00% |  |  |  |  |  |  |  |  |  | 10.00% |  |  |  |
Fair Value Assumptions, Expected Term | 6 months |  |  |  |  |  |  |  |  |  | 5 months |  |  |  |
Finnerty - Warrants [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  |  |  |  |  |  |  |  |  |  | 87.00% |  |  |  |
Finnerty - Warrants [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  |  |  |  |  |  |  |  |  |  | 72.00% |  |  |  |
Black Scholes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions, Expected Dividend Payments |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  |  |
Black Scholes [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions, Risk Free Interest Rate |  |  |  |  |  |  |  |  |  |  | 2.37% |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  |  |  |  |  |  |  |  |  |  | 55.00% |  |  |  |
Fair Value Assumptions, Expected Term |  |  |  |  |  |  |  |  |  |  | 9 years |  |  |  |
Black Scholes [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions, Risk Free Interest Rate |  |  |  |  |  |  |  |  |  |  | 1.94% |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  |  |  |  |  |  |  |  |  |  | 45.00% |  |  |  |
Fair Value Assumptions, Expected Term |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |
Veritone [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets, Current |  |  | 78,509,000 |  |  |  |  |  |  | $ 78,509,000 |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 10,914,000 |  |  |  |  |
Investment Income, Interest |  |  |  |  |  |  |  |  |  |  | $ 1,100,000 |  |  |  |
Gross Profit |  |  |  |  |  |  |  |  |  | 10,090,000 |  |  |  |  |
Operating Expenses |  |  |  |  |  |  |  |  |  | 44,024,000 |  |  |  |  |
Other Operating Income (Expense), Net |  |  |  |  |  |  |  |  |  | (12,872,000) |  |  |  |  |
Net Income (Loss) Available to Common Stockholders, Diluted |  |  |  |  |  |  |  |  |  | $ (51,281,000) |  |  |  |  |
Basic and diluted loss per common share |  |  |  |  |  |  |  |  |  | $ (5,940) |  |  |  |  |
Assets, Noncurrent |  |  | 1,173,000 |  |  |  |  |  |  | $ 1,173,000 |  |  |  |  |
Assets |  |  | 79,682,000 |  |  |  |  |  |  | 79,682,000 |  |  |  |  |
Liabilities, Current |  |  | 31,836,000 |  |  |  |  |  |  | 31,836,000 |  |  |  |  |
Liabilities, Noncurrent |  |  | 14,000 |  |  |  |  |  |  | 14,000 |  |  |  |  |
Liabilities |  |  | 31,850,000 |  |  |  |  |  |  | 31,850,000 |  |  |  |  |
Preferred Stock, Value, Outstanding |  |  | 0 |  |  |  |  |  |  | 0 |  |  |  |  |
Stockholders' Equity Attributable to Parent |  |  | 47,832,000 |  |  |  |  |  |  | 47,832,000 |  |  |  |  |
Total liabilities, preferred stock and stockholders' equity |  |  | $ 79,682,000 |  |  |  |  |  |  | $ 79,682,000 |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment Owned, Balance, Shares |  | 4,119,521 |  |  |  |  |  |  |  |  | 4,119,521 |  |  |  |
Investments at fair value |  | $ 90,795,000 |  |  |  |  |  |  |  |  | $ 90,795,000 |  |  |  |
Warrant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment Owned, Balance, Shares |  | 1,120,432 |  |  |  |  |  |  |  |  | 1,120,432 |  |  |  |
Investments at fair value |  | $ 13,959,000 |  |  |  |  |  |  |  |  | $ 13,959,000 |  |  |  |
Veritone Loans [Member] | Veritone [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares outstanding | 1,523,746 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Primary warrant [Member] | Veritone [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares outstanding | 2,150,335 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bridge Loan [Member] | Veritone [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares outstanding | 295,440 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on Conversion of Loan and Accrued Interest |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |
Gain on exercise of Primary Warrant |  |  |  |  |  |  |  |  |  |  | (4,616,000) |  |  |  |
Change in fair value of investment |  |  |  |  |  |  |  |  |  |  | 8,317,000 |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on Conversion of Loan and Accrued Interest |  |  |  |  |  |  |  |  |  |  | 2,671,000 |  |  |  |
Gain on exercise of Primary Warrant |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |
Change in fair value of investment |  |  |  |  |  |  |  |  |  |  | $ 33,922,000 |  |  |  |

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- Definition Stated interest rate of notes receivable from time-sharing transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 978 -SubTopic 310 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68077313&loc=d3e27327-108691 + Details
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