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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Company Recorded Stock-based Compensation Expense
The Company recorded stock-based compensation expense to the following line items in the consolidated statements of operations for the years ended December 31:

(in thousands)202120202019
Cost of sales - contracts$340 $367 $234 
Selling, general and administrative14,275 3,884 2,472 
Total stock-based compensation expense$14,615 $4,251 $2,706 
Schedule of Information With Respect to Stock Options
The below tables presents information with respect to stock options:
(in thousands, except for exercise price)Number of SharesWeighted
Average
Exercise Price		Aggregate
 Intrinsic Value
Outstanding at Outstanding at December 31, 2020957 $14.29 
Options granted564 7.88 
Options exercised(104)11.01 
Options forfeited(111)11.94 
Outstanding at Outstanding at December 31, 20211,306 $11.95 $54,443 
Vested and expected to vest at December 31, 20211,295 $11.95 $53,990 
Total shares exercisable at December 31, 2021799 $11.72 $33,486 
Shares remaining available for future grant449 

(in thousands, except for grant date fair value)202120202019
Option expense recorded, in thousands, for the year ended December 31,$9,585 $1,386 $456 
Weighted average grant date fair value$60.48 $13.82 $24.87 
Total intrinsic value of stock options exercised, in thousands, for the year ended December 31,$6,000 $1,900 $5,400 
Cash received for options exercised$1,156 $675 $1,433 
Schedule of Assumptions for Fair Value of Options at the Date of the Grant
Issuance date fair value of the Warrant was determined to be $14.3 million based on using the Black-Scholes model with the following assumptions:


Expected term5.0 years
Risk free interest rate0.85 %
Expected volatility53.78 %
Expected dividend yieldNone
Fair value (per warrant)$28.65 
The fair value of options at the date of the grant was estimated using the Black-Scholes model with the following assumptions for the respective period ending December 31:

202120202019
Expected option life3.1 years4.4 years3.0 years
Weighted average risk-free interest rate0.4 %0.4 %2.0 %
Weighted average expected volatility56.5 %47.6 %35.0 %
Expected dividend yieldNoneNoneNone
Schedule of Share-based Compensation by Exercise Price Range Stock options outstanding at December 31, 2021 are summarized as follows:
Range of exercise pricesNumber outstanding (in thousands)Weighted average remaining lifeWeighted average exercise price
$0.73 - $35.17
1,306 7.68 years$11.95 
Schedule of Activity With Respect to Non-vested Stock Options
Current year activity with respect to the Company’s non-vested RSAs is as follows:

Non-vested RSAsShares (in thousands)Weighted average grant-date fair value
Balance at January 1, 202161$25.62 
Granted222.30 
Vested(34)21.29
Forfeited(2)24.87
Balance at December 31, 20212725.42

The below table presents information with respect to RSA:

(in thousands)202120202019
Service-based RSA$62 $210 $213 
Performance-based RSA776 786 2,012 
Total stock-based compensation related to RSA$838 $996 $2,225 
The fair value of RSAs is based on the closing price of the Company’s common stock on the date of grant. The below table presents information with respect to RSAs:

(in thousands, except weighted average grant date fair value)202120202019
Weighted average grant date fair value of RSAs granted during the year$22.30 $30.96 $24.77 
Number of shares released during the year in accordance with the terms of the RSA agreements34 112 13 
Number of RSA shares canceled during the year2 5 53 
Number of above RSA shares canceled which were performance-based1 4 38 
Summary of Restricted Stock Awards Activity
Current year activity with respect to the Company’s non-vested RSUs is as follows:

Non-vested RSUsShares (in thousands)Weighted Average grant- date fair value
Balance at January 1, 2021427 $15.46 
Granted203 66.42 
Vested(176)18.71 
Forfeited(36)72.33 
Balance at December 31, 2021418 $34.08 

The below table presents information with respect to RSUs:

(in thousands)202120202019
Service-based RSU$3,353 $1,587 $25 
Performance-based RSU839 282 — 
Total stock-based compensation related to RSU$4,192 $1,869 $25