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Stock Option Plan (Tables)

3 Months Ended

Mar. 31, 2020

Share-based Payment Arrangement [Abstract]

Schedule of Stock Option Activity

Activity under the Company's stock option plans is set forth below:

						Number of Options						Weighted- Average Exercise Price						Weighted- Average Remaining Contractual Term (Years)						Aggregate Intrinsic Value
Outstanding, December 31, 2019						1,375,542						$	8.33					9.16						$	23,654
Granted						514,131						$	19.51
Exercised						(43,700)						$	0.26
Forfeited						(215,542)						$	9.73
Expired						(417)						$	19.04
Outstanding, March 31, 2020						1,630,014						$	11.88					9.22						$	9,324
Vested and expected to vest, March 31, 2020						1,630,014						$	11.88					9.22						$	9,324
Options exercisable, March 31, 2020						199,168						$	3.77					7.90						$	2,740

Schedule of Fair Value Assumptions, Stock Options

The fair value of employee stock options was estimated using the following assumptions to determine the fair value of stock options granted:

						Three Months Ended March 31,
						2020						2019
Expected volatility						47%-50%						59%
Risk-free interest rate						0.6%-1.7%						2.6%
Dividend yield						—						—
Expected term (in years)						6.08						6.08

Schedule of Non-cash Stock-based Compensation Expense

Total non-cash stock-based compensation expense recorded related to options granted in the condensed statement of operations is as follows (in thousands):

						Three Months Ended March 31,
						2020						2019
Cost of revenue						$	6					$	1
Selling, general and administrative						422						10
Research and development						3						1
Total						$	431					$	12

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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