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Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2023

Stock-Based Compensation

Summary of compensation costs related to stock-based awards

The following table summarizes compensation costs related to our stock-based awards (in thousands, except per share data):

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Three Months Ended

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Nine Months Ended

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​

​

September 30,

​

September 30,

​

​

2023

2022

2023

2022

Cost of revenue

​

$

102

​

$

51

​

$

310

​

$

277

​

Selling, general and administrative

​

639

​

806

​

1,926

​

2,480

​

Research and development

​

150

​

179

​

482

​

504

​

Net effect on net income (loss)

​

$

891

​

$

1,036

​

$

2,718

​

$

3,261

​

Summary of stock option activity

The following table summarizes the stock option transactions during the nine months ended September 30, 2023 (in thousands, except per share data):

​	​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	Weighted-	​	​	​	​
​		​		​	​		average		​	​
​	​	​	​	Weighted-		​	Remaining	​	​	​
​	​	Number of	​	average		​	Contractual	​	Aggregate
​	​	Options	​	Exercise		​	Life	​	Intrinsic
Stock Options		Outstanding		Price			(in years)		Value
Balance as of January 1, 2023	​	1,206	​	$	5.09		5.08	​	$	630	​
Granted		—	​		—	​	​	​	​	​	​
Exercised		(4)	​	​	2.30	​	​	​	​	​	​
Canceled and expired		(2)	​	​	4.79	​	​	​	​	​	​
Balance as of September 30, 2023		1,200	​	$	5.10		4.34	​	$	14	​
Options vested as of September 30, 2023 and unvested options expected to vest, net of forfeitures		1,200	​	$	5.10		4.34	​	$	14	​
Options exercisable as of September 30, 2023		1,177	​	$	5.14		4.31	​	$	14	​

Summary of restricted stock awards activity

A summary of activity related to restricted stock awards for the nine months ended September 30, 2023 is presented below (in thousands, except per share data):

​	​	​	​	​	​	​
​		​		Weighted-Average
​	​	​	​	Grant Date
Stock Awards		Shares		Share Value
Non-vested as of January 1, 2023	​	984	​	$	5.55	​
Granted		90	​	$	3.65	​
Vested		(141)	​	$	5.89	​
Forfeited	​	(3)	​	$	5.40	​
Non-vested as of September 30, 2023		930	​	$	5.31	​

Summary of unvested at-risk performance shares

A summary of the status of our unvested at-risk, performance shares as of September 30, 2023 is presented below (in thousands, except per share data):

​	​	​	​	​	​
​		​		Weighted-Average
​	​	​	​	Grant Date
Stock Awards		Shares		Share Value
Non-vested as of January 1, 2023	​	76	​	$	15.37
Granted		13	​	$	3.71
Vested		—	​	$	​
Forfeited	​	(13)	​	$	3.71
Non-vested as of September 30, 2023		76	​	$	15.37

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Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit.

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