v3.20.4

Stock-Based Compensation - Stock Option Activity (Details) - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Number of Options |  |
Number of options exercisable (in shares) | 1,972,740 |
Weighted Average Exercise Price per Option |  |
Weighted average exercise price per option, exercisable (in usd per share) | $ 2.1 |
Weighted Average Grant Date Fair Value per Option |  |
Weighted average remaining contractual term, outstanding | 5 years 6 months |
Weighted average remaining contractual term, exercisable | 5 years 9 months 18 days |
Stock Option | Directors, officers consultants and employees |  |
Number of Options |  |
Number of options outstanding, beginning balance (in shares) | 3,725,000 | 3,867,621
Number of options granted (in shares) | 877,575 | 2,450,000
Number of options exercised (in shares) | (2,112,392) | (736,552)
Number of options forfeited (in shares) | (118,943) | (907,500)
Number of options exercised (in shares) | (20,000) | (948,569)
Number of options outstanding, ending balance (in shares) | 2,351,240 | 3,725,000
Weighted Average Exercise Price per Option |  |
Weighted average exercise price per option outstanding, beginning balance (in usd per share) | $ 2.3 | $ 4.1
Weighted average exercise price per option outstanding, grants in period (in usd per share) | 1.9 | 1.0
Weighted average exercise price per option outstanding, exercised in period (in usd per share) | 2.4 | 0.7
Weighted average exercise price per option outstanding, forfeited in period (in usd per share) | 5.8 | 4.5
Weighted average exercise price per option outstanding, expirations in period (in usd per share) | 2.4 | 5.0
Weighted average exercise price per option outstanding, ending balance (in usd per share) | 2.0 | 2.3
Weighted Average Grant Date Fair Value per Option |  |
Weighted average grant date fair value per option, grants in period (in usd per share) | $ 0.6 | $ 0.5

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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + 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 (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + 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 (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Number of fully vested and expected to vest exercisable options that may be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + 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 (e)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for fully vested and expected to vest exercisable or convertible options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + 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 (e)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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