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Stock Based Compensation (Additional Information) (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 $ / shares shares | Jun. 30, 2017 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Weighted average exercise price, granted | $ / shares | $ 0.54 | $ 1.15
Averages contractual term |  | 10 years
Estimated annualized forfeiture rate for options granted to employees |  | 15.00%
Estimated annualized forfeiture rate for options granted to senior management |  | 8.00%
Unrecognized compensation cost | $ |  | $ 713
Operating expenses weighted average period |  | 2 years 3 months 18 days
Shares subject to outstanding common stock options granted |  | 105,000
Minimum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Average vesting term |  | 4 years
Maximum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Average vesting term |  | 6 years
2007 Incentive Plan |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares of common stock reserved for issuance | 1,325,000 | 1,325,000
Shares subject to outstanding common stock options granted |  | 505,000
Shares available for future grants | 466,000 | 466,000
Vesting periods of options granted |  | 4 years
Options expire from date of grant |  | 10 years
Closing price of the Company's common stock | $ / shares | $ 0.58 | $ 0.58

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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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