Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 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		(677	)
Cancelled		43
Balance at September 30, 2022		997

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		591		$	6.19
Options exercised		—		$	—
Options cancelled		(37	)	$	6.89
Outstanding at September 30, 2022		1,207		$	6.91		8.9	$	—
Vested and expected to vest at September 30, 2022		1,207		$	6.91		8.9	$	—
Vested and exercisable at September 30, 2022		373		$	7.52		8.6	$	—

Summary of Fair Value of Stock Options was Estimated Using Assumptions

The fair value of stock options was estimated using the following assumptions for the three and nine months ended September 30, 2022 and 2021:

	Three Months Ended September 30,		Nine Months Ended September 30,
	2022	2021	2022	2021
Risk-free interest rate	2.7 - 3.4%	0.8 - 1.1%	1.5 - 3.4%	0.6 - 1.1%
Expected term (years)	6	6	6	6
Expected volatility	70%	73%	70%	72 - 73%
Dividends	0.0%	0.0%	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 September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Cost of revenue – product	$	57	$	46	$	163	$	168
Cost of revenue – service		33		27		95		95
Selling, general and administrative expenses		1,423		1,373		4,197		4,580
Research and development expenses		159		127		461		480
Total	$	1,672	$	1,573	$	4,916	$	5,323

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	$	1,649
2023		4,231
2024		994
2025		639
2026		24
Thereafter		—
Total unrecognized stock-based compensation expense	$	7,537

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		(591	)	$	10.30
Restricted stock awards cancelled		(6	)	$	10.81
Non-vested at September 30, 2022		735		$	10.28

Restricted Stock Units

Summary of Restricted Stock Award and Restricted Stock Units Activity

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		86	$	6.33
Restricted stock units vested		—	$	—
Restricted stock units cancelled		—	$	—
Non-vested at September 30, 2022		86	$	6.33