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Stockholders' Equity (Details 1) - Stock option plans [Member] | 3 Months Ended
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Mar. 31, 2019 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of Shares, Non-vested stock options as of January 1, 2019 | shares | 334,000
Number of Shares, Non-vested stock options as of March 31, 2019 | shares | 332,000
Number of Shares, Stock options granted during the three-month period ended March 31, 2019 | shares | 10,000
Number of Shares, Stock options that vested during the three-month period ended March 31, 2019 | shares |
Number of Shares, Stock options that were forfeited during the three-month period ended March 31, 2019 | shares | 12,000
Weighted Average Fair Value at Grant Date, Non-vested stock options as of January 1, 2019 | $ 3.63
Weighted Average Fair Value at Grant Date, Non-vested stock options as of March 31, 2019 | 3.65
Weighted Average Fair Value at Grant Date, Stock options granted during the three-month period ended March 31, 2019 | 3.16
Weighted Average Fair Value at Grant Date, Stock options that vested during the three-month period ended March 31, 2019 |
Weighted Average Fair Value at Grant Date, Stock options that were forfeited during the three-month period ended March 31, 2019 | 2.65
Weighted Average Exercise Price, Non-vested stock options as of January 1, 2019 | 6.64
Weighted Average Exercise Price, Non-vested stock options as of March 31, 2019 | 6.72
Weighted Average Exercise Price, Stock options granted during the three-month period ended March 31, 2019 | 7.50
Weighted Average Exercise Price, Stock options that vested during the three-month period ended March 31, 2019 |
Weighted Average Exercise Price, Stock options that were forfeited during the three-month period ended March 31, 2019 | $ 5.07

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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the non vested stock option plan. + References No definition available. + Details
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- Definition Weighted average price at which option holders acquired shares when vesting their stock options. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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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 Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. + References No definition available. + Details
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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. + References No definition available. + 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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