Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2022

Summary of Shares Available for Issuance Under 2020 Plan

A summary of the shares available for issuance under the 2020 Plan is as follows:

	Number of Shares
Balance at December 31, 2021		1,082
Authorized		549
Granted/Awarded		(536	)
Cancelled		32
Balance at March 31, 2022		1,127

Summary of Option Award Activity

Option award activity under the 2020 Plan is set forth below:

	Options Outstanding
	Number of Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (In Years)		Aggregate Intrinsic Value
Outstanding at December 31, 2021		653		$	7.57		9.3	$	—
Options granted		476		$	6.04
Options exercised		—		$	—
Options cancelled		(27	)	$	6.88
Outstanding at March 31, 2022		1,102		$	6.92		9.3	$	752
Vested and expected to vest at March 31, 2022		1,102		$	6.92		9.3	$	752
Vested and exercisable at March 31, 2022		203		$	7.71		9.0	$	11

Summary of Fair Value of Stock Options was Estimated Using Assumptions

The Company estimated the fair value of stock-options using the Black-Scholes option pricing model. The fair value of stock options is being amortized on a straight-line basis over the requisite service period of the awards. The fair value of stock options was estimated using the following assumptions for the three months ended March 31, 2022 and 2021:

	Three Months Ended March 31,
	2022	2021
Risk-free interest rate	1.5 - 1.6%	0.6 - 1.1%
Expected term (years)	6	6
Expected volatility	70%	72 - 73%
Dividends	0.0%	0.0%

Summary of Total Stock-Based Compensation Expense Recognized

The following table sets forth the total stock-based compensation expense recognized under the 2020 Plan and the 2020 ESPP in the Company’s condensed statements of operations:

	Three Months Ended March 31,
	2022		2021
Cost of revenue – product	$	52	$	75
Cost of revenue – service		30		41
Selling, general and administrative expenses		1,377		1,984
Research and development expenses		148		220
Total	$	1,607	$	2,320

Summary of Unrecognized Stock-based Compensation Expense Expected to be Amortized

Total unrecognized stock-based compensation expense is expected to be amortized as follows:

Fiscal Year	Amount
2022		4,498
2023		3,988
2024		984
2025		625
2026		13
Thereafter		—
Total unrecognized stock-based compensation expense	$	10,108

Restricted Stock Awards

Summary of Restricted Stock Award and Restricted Stock Units Activity

Restricted stock award activity under the 2020 Plan is set forth below:

	Restricted Stock Awards Outstanding
	Number of Units			Weighted Average Grant Date Fair Value Per Share
Non-vested at December 31, 2021		1,332		$	10.29
Restricted stock awards granted		—		$	—
Restricted stock awards vested		(338	)	$	10.38
Restricted stock awards cancelled		(5	)	$	10.81
Non-vested at March 31, 2022		989		$	10.26

Restricted Stock Units

Summary of Restricted Stock Award and Restricted Stock Units Activity

Restricted stock units granted to employees generally vest over four years in annual equal increments. The fair value of restricted stock units is based on the Company’s closing stock price on the date of grant.

Restricted stock unit activity under the 2020 Plan is set forth below:

	Restricted Stock Units Outstanding
	Number of Units		Weighted Average Grant Date Fair Value Per Share
Non-vested at December 31, 2021		—	$	—
Restricted stock units granted		60	$	6.04
Restricted stock units vested		—	$	—
Restricted stock units cancelled		—	$	—
Non-vested at March 31, 2022		60	$	6.04