Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2022

Share-Based Payment Arrangement [Abstract]

Share-based Payment Arrangement, Expensed and Capitalized, Amount

Stock-based compensation expense, net of forfeitures of $0.2 million and $0.1 million for the three months ended June 30, 2022 and 2021, respectively, and $0.8 million and $0.1 million for the six months ended June 30, 2022 and 2021, respectively, was recorded in the following line items in the condensed consolidated statements of operations.

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
Cost of sales - contracts	$	36	$	116	$	85	$	184
Selling, general and administrative	3,195		4,135		6,682		5,387
Total stock-based compensation expense	$	3,231	$	4,251	$	6,767	$	5,571

Summary of Stock Option Activity

A summary of stock option activity for the six months ended June 30, 2022 is below:

(in thousands, except for weighted average exercise price)	Options outstanding	Weighted average exercise price
Outstanding at January 1, 2022	1,306	$	11.95
Exercised	(112)	7.74
Canceled/forfeited	(126)	10.48
Outstanding at June 30, 2022	1,068	$	12.89

Summary of Restricted Stock and RSU Awards Activity

A summary of unvested restricted stock awards activity for the six months ended June 30, 2022 is below:

(in thousands, except for weighted average award value)	Restricted Stock Awards	Weighted average award value
Outstanding at January 1, 2022	27	$	25.42
Vested	(27)	25.42
Outstanding at June 30, 2022	—

A summary of unvested restricted stock units activity for the six months ended June 30, 2022 is below:

(in thousands, except for weighted average award value)	Restricted Stock Unit Awards	Weighted average award value
Outstanding at January 1, 2022	418	$	34.08
Granted	359	38.04
Vested	(107)	31.67
Canceled/forfeited	(79)	48.23
Outstanding at June 30, 2022	591	$	34.92