Stock-based Compensation - Schedule of Outstanding Options Exercise Price (Details) |
12 Months Ended |
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Dec. 31, 2018
$ / shares
shares
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| Number of options outstanding | shares | 13,457,000 |
| Weighted Average Exercise Price Per Share | $ 1.13 |
| Exercise Price One [Member] | |
| Exercise price, minimum | 0.41 |
| Exercise price, maximum | $ 0.63 |
| Number of options outstanding | shares | 2,835,000 |
| Weighted Average Exercise Price Per Share | $ 0.43 |
| Exercise Price Two [Member] | |
| Exercise price, minimum | 0.68 |
| Exercise price, maximum | $ 1.12 |
| Number of options outstanding | shares | 6,521,000 |
| Weighted Average Exercise Price Per Share | $ 0.88 |
| Exercise Price Three [Member] | |
| Exercise price, minimum | 1.24 |
| Exercise price, maximum | $ 1.95 |
| Number of options outstanding | shares | 2,585,000 |
| Weighted Average Exercise Price Per Share | $ 1.31 |
| Exercise Price Four [Member] | |
| Exercise price, minimum | 2.74 |
| Exercise price, maximum | $ 3.32 |
| Number of options outstanding | shares | 1,516,000 |
| Weighted Average Exercise Price Per Share | $ 3.23 |
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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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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