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Stock Option Plan (Tables)

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of Share-based Payment Arrangement, Restricted Stock Unit, Activity

RSU activity under the Company's 2019 Plan is set forth below:

						Number of Shares						Weighted- Average Grant Date Fair Value						Aggregate Intrinsic Value
Outstanding, December 31, 2022						1,036,208						$	7.28					$	2,487
Awards granted						857,300						$	2.39
Awards released						(273,319)						$	7.80
Awards canceled						(232,730)						$	6.80
Outstanding, December 31, 2023						1,387,459						$	4.24					$	2,761

Schedule of Stock Option Activity

Stock option activity under the Company's 2019 Plan is set forth below:

						Number of Options						Weighted- Average Exercise Price						Weighted- Average Remaining Contractual Term (Years)						Aggregate Intrinsic Value
Outstanding, December 31, 2022						1,421,235						$	12.94					7.09						$	483
Granted						73,500						$	3.04
Exercised						(93,335)						$	0.26
Forfeited						(43,895)						$	13.83
Expired						(370,686)						$	16.88
Outstanding, December 31, 2023						986,819						$	11.87					6.44						$	228
Vested and expected to vest, December 31, 2023						986,819						$	11.87					6.44						$	228
Options exercisable, December 31, 2023						877,937						$	12.46					6.18						$	228

Schedule of Non-cash Stock-based Compensation Expense

Total non-cash stock-based compensation expense recorded related to options, RSUs and stock purchase rights granted under the ESPP in the statement of operations is as follows (in thousands):

 

						Year Ended December 31,
						2023						2022
Cost of revenue						$	191					$	213
Selling, general and administrative						3,174						3,860
Research and development						252						631
Total						$	3,617					$	4,704

Schedule of Common Stock Reserved For Future Issuance

Common stock reserved for future issuance consists of the following at December 31, 2023:

Warrants to purchase common stock						1,214,059
Common stock option grants issued and outstanding						986,819
Common stock reserved for issuance upon vesting of outstanding restricted stock units						1,387,459
Common shares available for grant under the 2019 Plan						1,831,107
Common shares available for future issuance under ESPP						449,332
Total						5,868,776

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Tabular disclosure of share-based payment arrangement.

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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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