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Stock Based Compensation - Summary of Outstanding Stock Option Activity (Details)	6 Months Ended
	Jun. 30, 2020 $ / shares shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of shares, Beginning balance | shares	1,600,000
Number of shares, Granted | shares	375,000
Number of shares, Exercised | shares	(3,000)
Number of shares, Expired/Forfeited | shares	(89,000)
Number of shares, Ending balance | shares	1,883,000
Number of shares, Vested and exercisable | shares	929,000
Number of shares, Vested and expected to vest | shares	1,883,000
Weighted average exercise price, Beginning balance | $ / shares	$ 9.98
Weighted average exercise price, Granted | $ / shares	9.99
Weighted average exercise price, Exercised | $ / shares	6.17
Weighted average exercise price, Expired/Forfeited | $ / shares	10.25
Weighted average exercise price, Ending balance | $ / shares	9.97
Weighted average exercise price, Vested and exercisable | $ / shares	8.79
Weighted average exercise price, Vested and expected to vest | $ / shares	$ 9.97
Weighted average remaining contractual term (years)	8 years
Weighted average remaining contractual term (years), Vested and exercisable	7 years
Weighted average remaining contractual term (years), Vested and expected to vest	8 years

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For presentations that combine terminations, 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 or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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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.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest exercisable or convertible options. 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.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. 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.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents 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.

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