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Securities Owned/Sold but Not Yet Purchased | 9 Months Ended
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Sep. 30, 2018
Fair Value Disclosures [Abstract] |
Securities Owned/Sold but Not Yet Purchased | 6. Securities Owned/Sold but Not Yet Purchased These securities consist of securities classified as trading and available-for-sale, as follows:
|  | September 30, 2018 |  |  | December 31, 2017 |
Securities Owned |  |  |  |  |  |  |  |
Trading securities |  | $ | 4,426 |  |  | $ | 1,691 |
Available-for-sale debt securities |  |  | — |  |  |  | 64,603 |
Total |  | $ | 4,426 |  |  | $ | 66,294 |
Securities Sold, but not yet Purchased |  |  |  |  |  |  |  |
Trading securities |  | $ | 2,018 |  |  | $ | 950 |
Available-for-sale debt securities |  |  | — |  |  |  | — |
Total |  | $ | 2,018 |  |  | $ | 950 |
Available-for-Sale Debt Securities The following table summarizes unrealized gains, losses and fair value of the available-for-sale debt securities:
|  | September 30, 2018 |  |  | December 31, 2017 |
Cost |  | $ | — |  |  | $ | 65,237 |
Gross unrealized gains in other comprehensive income |  |  | — |  |  |  | — |
Gross unrealized losses in other comprehensive income |  |  | — |  |  |  | (634 | )
Fair value |  | $ | — |  |  | $ | 64,603 |
During the three and nine months ended September 30, 2018, the Company received $0 and $64,498, respectively, of proceeds from the sale and maturity of available-for-sale securities and recognized gross realized losses of $0 and $739, respectively. During the three and nine months ended September 30, 2017, the Company received $19,003 and $65,067, respectively, of proceeds from the sale and maturity of available-for-sale securities and recognized gross realized losses of $277 and $687, respectively. Realized losses have been reclassified out of accumulated other comprehensive income and into the Consolidated Statements of Operations.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -URI http://asc.fasb.org/topic&trid=2155941 + Details
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