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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 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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Six Months Ended

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​

​

June 30,

​

June 30,

​

​

2023

2022

2023

2022

Cost of revenue

​

$

103

​

$

113

​

$

208

​

$

226

​

Selling, general and administrative

​

655

​

859

​

1,287

​

1,674

​

Research and development

​

154

​

162

​

332

​

325

​

Net effect on net income (loss)

​

$

912

​

$

1,134

​

$

1,827

​

$

2,225

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Summary of stock option activity

The following table summarizes the stock option transactions during the six months ended June 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 June 30, 2023		1,200	​	$	5.10		4.59	​	$	228	​
Options vested as of June 30, 2023 and unvested options expected to vest, net of forfeitures		1,200	​	$	5.10		4.59	​	$	228	​
Options exercisable as of June 30, 2023		1,143	​	$	5.20		4.51	​	$	207	​

Summary of restricted stock awards activity

A summary of activity related to restricted stock awards for the six months ended June 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 June 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 June 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	​	—	​	$	​
Non-vested as of June 30, 2023		89	​	$	13.71

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*The number of shares presented is based on achieving 150% of the targeted financial performance metric as defined in the at-risk, performance shares agreement.

​

** The first annual vesting was reported in Q4 2021, when 25% of the at-risk performance shares became eligible subject to review and confirmation by the Compensation Committee after year-end results were certified.

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