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Net Income Per Share and Stockholders' Equity, Anti Dilution Table (Details) |  | 3 Months Ended |
--- | --- | --- | ---
Apr. 07, 2016 | Mar. 31, 2019 shares | Mar. 31, 2018 shares | Dec. 31, 2018 shares
Antidilutive Securities Excluded from Computation of Earnings Per Share |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  | 4,000 | 0 |
Authorized number of shares of Series A Preferred Stock (shares) |  | 5,000,000 |  | 5,000,000
Series A Preferred Stock [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share |  |  |  |
Preferred Stock, Rights Conversion Ratio into Preferred Stock | 1 |  |  |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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