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Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2021

Equity [Abstract]

Schedule of Key Assumptions Used to Determine Fair Value of Options Granted

The weighted-averages for assumptions used in determining the fair value of stock options granted were as follows:

			Year Ended December 31,
			2021						2020
Volatility			78.9%						61.2%
Risk-free interest rate			1.2%						1.4%
Expected life (years)			6.25						6.14
Dividend yield rate			—%						—%

Schedule of Stock Options Activity

A summary of stock option activity under the Plan for the year ended December 31, 2021 and 2020, is presented below:

															Weighted
									Weighted						Average
									Average						Remaining						Aggregate
			Stock						Exercise						Contractual						Intrinsic
			Options						Per Share						Terms (Years)						Value
Outstanding as of December 31, 2019			3,977,401						14.07						8.51						$	7,198
Granted			1,322,119						8.89
Exercised			—
Cancelled/forfeited			(892,022)						15.62
Outstanding as of December 31, 2020			4,407,498						$	12.20					7.66						$	50
Granted			357,125						9.18
Exercised			(99,435)						9.81
Cancelled/forfeited			(742,902)						16.21
Outstanding as of December 31, 2021			3,922,286						$	11.23					7.10						$	455
Exercisable as of December 31, 2021			2,316,637						$	11.44					6.67						$	98
Vested and expected to vest as of December 31, 2021			3,922,286						$	11.23					7.10						$	455

Schedule of RSUs Activity

A summary of RSU activity under the Plan for the year ended December 31, 2021 and 2020, is presented below:

									Weighted
			Restricted						Average
			Stock						Grant Date
			Units						Fair Value
Outstanding as of December 31, 2019			229,870						$	15.89
Granted			1,301,439						5.88
Vested			(186,870)						13.6
Forfeited			(170,698)						7.21
Outstanding as of December 31, 2020			1,173,741						$	6.42
Granted			1,850,243						7.94
Vested			(566,788)						5.08
Forfeited			(530,729)						7.22
Outstanding as of December 31, 2021			1,926,467						$	8.06

Schedule of Stock-based Compensation Expense

The following table summarizes stock-based compensation expense arising from the above Plan:

			Year Ended December 31,
			2021						2020
Selling, general and administrative			$	9,372					$	10,408
Research and development			204						176
Total stock-based compensation expense			$	9,576					$	10,584

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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 of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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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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