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Stock-Based Compensation - Summary of Non-vested Restricted Stock Awards (Details) - Restricted Stock Awards [Member] - $ / shares | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Number Outstanding, Non-vested stock awards outstanding, Beginning Balance |  | 4,785
Number Outstanding, Non-vested stock awards outstanding, Granted | 35,000 | (3,357)
Number Outstanding, Non-vested stock awards outstanding, Vested and issued | (6,000) | (1,428)
Number Outstanding, Non-vested stock awards outstanding, Forfeited | (6,500) |
Number Outstanding, Non-vested stock awards outstanding, Ending Balance | 22,500 |
Weighted Average Grant Date Fair Value, Beginning Balance |  | $ 37.42
Weighted Average Grant Date Fair Value, Granted | 2.71 | 42.20
Weighted Average Grant Date Fair Value, Vested and issued | 2.77 | 26.18
Weighted Average Grant Date Fair Value, Forfeited | 2.64 |
Weighted Average Grant Date Fair Value, Ending Balance | $ 2.72 |

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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Number of non-vested options outstanding. + References No definition available. + Details
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- Definition Number of non-vested options forfeited. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options forfeited. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options outstanding. + References No definition available. + Details
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- Definition Number of options vested. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of options vested. + References No definition available. + Details
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- Details
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