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Stock-based compensation
 3 Months Ended
Jun. 30, 2020
Share-based Payment Arrangement [Abstract]  
Stock-based compensation Stock-based compensation
Service-based vesting stock options
The following table summarizes the activity for options that vest solely based upon the satisfaction of a service condition for the three months ended June 30, 2020:
 
Options
outstanding
 
Weighted-average exercise price
 
Weighted-average remaining
contractual life
(in years)
 
Aggregate intrinsic
values
(in thousands)
Balance as of March 31, 2020
1,999,553

 
$
13.17

 
 
 
 

Exercised
(98,970
)
 
3.45

 
 
 
 

Canceled or forfeited
(5,083
)
 
21.61

 
 
 
 

Balance as of June 30, 2020
1,895,500

 
$
13.66

 
6.6
 
$
10,801

 
 
 
 
 
 
 
 
Exercisable, June 30, 2020
1,215,922

 
$
12.77

 
6.0
 
$
8,077


The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the Company's closing stock price of $19.07, as reported on the New York Stock Exchange on June 30, 2020.
The Company recognized stock-based compensation cost related to service-based vesting options of $0.6 million in both the three months ended June 30, 2020 and June 30, 2019. As of June 30, 2020, there was $2.7 million of total unrecognized stock-based compensation cost related to unvested service-based stock options, which is expected to be recognized over the remaining weighted-average period of 1.9 years. All stock-based compensation cost is recorded in selling, general and administrative expenses.
Performance-based and market-based vesting stock options
The following table summarizes the activity for stock options that vest based upon the satisfaction of performance or market conditions for the three months ended June 30, 2020:
 
Options
outstanding
 
Weighted-average exercise price
 
Weighted-average remaining
contractual life
(in years)
 
Aggregate intrinsic
values
(in thousands)
Balance as of March 31, 2020
1,252,932

 
$
7.97

 
 
 
 
Exercised
(27,600
)
 
1.84

 
 
 
 
Balance as of June 30, 2020
1,225,332

 
$
8.07

 
4.7
 
$
15,807

 
 
 
 
 
 
 
 
Exercisable, June 30, 2020
925,332

 
$
1.99

 
4.1
 
$
15,807


The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the Company's closing stock price of $19.07, as reported on the New York Stock Exchange on June 30, 2020.
As of June 30, 2020 and June 30, 2019, there was no unrecognized compensation cost related to performance-based and market-based vesting stock options.

Restricted stock
The following table summarizes the activities for restricted stock awards (“RSAs”) and restricted stock units (“RSUs”) for the three months ended June 30, 2020:
 
Shares of restricted stock outstanding
 
Weighted-average grant date fair value
Balance as of March 31, 2020
2,311,768

 
12.86

Granted
995,650

 
16.75

Vested
(48,991
)
 
14.08

Canceled or forfeited
(56,104
)
 
14.59

Balance as of June 30, 2020
3,202,323

 
14.02


As of June 30, 2020, there were 1,658,396 unvested shares subject to RSAs outstanding.
The Company recognized stock-based compensation cost related to RSAs and RSUs of $4.1 million and $3.3 million in the three months ended June 30, 2020 and June 30, 2019, respectively. As of June 30, 2020, there was $36.8 million of total unrecognized stock-based compensation cost related to unvested RSAs and RSUs, which is expected to be recognized over a weighted-average period of 2.5 years.