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Stockholders' Equity (Tables)
3 Months Ended
Mar. 31, 2023
Schedule of allocation of total stock-based compensation expense

Three Months Ended

March 31, 

(In thousands)

2023

    

2022

Cost of revenue

$

103

$

102

Sales and marketing expenses

752

1,027

Research and development expenses

49

83

Reimbursement, general and administrative expenses

1,119

1,016

Total stock-based compensation expense

$

2,023

$

2,228

Schedule of stock option activity

    

Weighted-

Weighted-

Average

Average

Aggregate

Options

Exercise Price

Remaining

Intrinsic

(In thousands except options and per share data)

Outstanding

Per Share (1)

Contractual Life

Value (2)

Balance at December 31, 2022

615,307

$

43.25

4.7 years

$

164

Granted

$

Exercised

(316)

$

1.11

$

4

Forfeited

(12,065)

$

44.78

Cancelled/Expired

(16,714)

$

48.81

Balance at March 31, 2023

586,212

$

43.09

4.4 years

$

358

Options exercisable at March 31, 2023

479,622

$

44.60

4.2 years

$

162

(1)The exercise price of each option granted during the period shown was equal to the market price of the underlying stock on the date of grant.
(2)The aggregate intrinsic value of options exercised represents the difference between the exercise price of the option and the closing stock price of our common stock on the date of exercise. The aggregate intrinsic value of options outstanding represents the difference between the exercise price of the option and the closing stock price of our common stock on the last trading day of the period.
Time-Based Restricted Stock Units  
Schedule of stock-settled restricted stock unit activity

Weighted-

    

    

Average Grant

    

Aggregate

Units

Date Fair Value

Intrinsic

(In thousands except unit and per unit data)

Outstanding

Per Unit

Value (1)

Balance at December 31, 2022

590,542

$

19.42

$

6,779

Granted

269,461

$

14.35

Vested

(102,651)

$

26.44

Cancelled

(18,613)

$

25.14

Balance at March 31, 2023

738,739

$

16.45

$

12,130

(1)The aggregate intrinsic value of restricted stock units outstanding was based on our closing stock price on the last trading day of the period.
Performance-based stock-settled restricted stock units  
Schedule of stock-settled restricted stock unit activity

Weighted-

    

    

Average Grant

    

Aggregate

PSUs

Date Fair Value

Intrinsic

(In thousands except unit and per unit data)

Outstanding

Per Unit

Value (1)

Balance at December 31, 2022

155,618

$

25.05

$

1,786

Granted

106,183

$

14.35

Vested

(9,915)

$

51.89

Cancelled

(7,762)

$

26.33

Balance at March 31, 2023

244,124

$

19.27

$

4,009

(1)The aggregate intrinsic value of PSUs outstanding was based on our closing stock price on the last trading day of the period.