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Stock Based Compensation - Schedule of Exercise Prices of Common Stock Options (Details) | 9 Months Ended
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Sep. 30, 2018 $ / shares shares
Exercise price lower range | $ / shares | $ 2.25
Exercise price upper range | $ / shares | $ 1.32
Number of Shares, Outstanding | 9,693,831
Number of Shares, Exercisable | 1,264,995
Exercise Price Range One [Member] |
Exercise price upper range | $ / shares | $ 1.00
Number of Shares, Outstanding | 6,111,500
Number of Shares, Exercisable | 45,832
Exercise Price Range Two [Member] |
Exercise price lower range | $ / shares | $ 1.01
Exercise price upper range | $ / shares | $ 1.25
Number of Shares, Outstanding | 1,818,859
Number of Shares, Exercisable | 866,658
Exercise Price Range Three [Member] |
Exercise price lower range | $ / shares | $ 1.26
Exercise price upper range | $ / shares | $ 1.50
Number of Shares, Outstanding | 45,000
Number of Shares, Exercisable | 1,949
Exercise Price Range Four [Member] |
Exercise price lower range | $ / shares | $ 1.51
Exercise price upper range | $ / shares | $ 1.75
Number of Shares, Outstanding | 487,222
Number of Shares, Exercisable | 130,139
Exercise Price Range Five [Member] |
Exercise price lower range | $ / shares | $ 1.76
Exercise price upper range | $ / shares | $ 2.00
Number of Shares, Outstanding | 1,055,000
Number of Shares, Exercisable | 190,417
Exercise Price Range Six [Member] |
Exercise price lower range | $ / shares | $ 2.01
Exercise price upper range | $ / shares | $ 2.25
Number of Shares, Outstanding | 135,000
Number of Shares, Exercisable |
Exercise Price Range Seven [Member] |
Exercise price lower range | $ / shares | $ 2.26
Exercise price upper range | $ / shares | $ 2.50
Number of Shares, Outstanding | 41,250
Number of Shares, Exercisable | 30,000

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- Definition Number of Shares, Outstanding at beginning of year. + References No definition available. + Details
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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + 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 (g) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + 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 (g) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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