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Stock-Based Compensation - Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
Sep. 01, 2020
Feb. 21, 2020
Jul. 31, 2019
Mar. 31, 2021
Mar. 31, 2020
Jan. 01, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Options granted (in shares)       0 0    
Options              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares exercised in period       $ 18,700      
Total grant-date fair value of stock options vested       1,800      
Nonvested award options, unrecognized compensation expense       $ 6,300      
Nonvested awards, period for recognition       1 year 4 months 24 days      
Restricted stock units              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Nonvested awards, period for recognition       3 years 2 months 12 days      
Cliff vesting period       4 years      
Unrecognized stock-based compensation expense related to RSUs       $ 114,100      
Restricted stock units | Vest in year one              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Cliff vesting period       1 year      
Vesting percent       25.00%      
Performance-based restricted stock units              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Service period (in years)       4 years      
Performance-based restricted stock units | Minimum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting percent       0.00%      
Performance-based restricted stock units | Maximum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting percent       100.00%      
Restricted shares              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Nonvested awards, period for recognition       1 year      
Unrecognized stock-based compensation expense related to RSUs       $ 10,300      
Employee stock purchase plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares authorized (in shares)     750,000 72,892      
Percentage increase of the number of common stock shares (in percentage)     1.00%        
Shares available for grant (in shares)       1,245,652   437,092  
Unrecognized stock-based compensation expense related to RSUs       $ 400      
ESPP share increase in period (in shares)     750,000        
Employee stock purchase plan period       6 months      
Maximum employee subscription rate       15.00%      
Maximum purchase value during offering period       $ 25,000      
Denominator of lowest purchase of a participant (in shares)       2,500      
Purchase price of common stock (in percentage)       85.00%      
Able Health Inc | Restricted shares              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Cliff vesting period   1 year          
Number of restricted shares issued (in shares)   179,392          
Service period (in years)   1 year          
Vitalware L L C              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares authorized (in shares)       89,250      
Number of restricted shares issued (in shares) 203,997            
Vitalware L L C | Restricted shares              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Nonvested awards, period for recognition       4 months 24 days      
Cliff vesting period 1 year            
Vesting percent 25.00%            
Unrecognized stock-based compensation expense related to RSUs       $ 2,800      
Number of restricted shares issued (in shares) 203,997            
Vitalware L L C | Restricted shares | Vest in year one              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Cliff vesting period 1 year            
Vesting percent 75.00%            
Stock Incentive Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares authorized (in shares)       15,294,920     13,109,459
Shares available for grant (in shares)       3,086,399     2,481,818
2011 Stock Incentive Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares authorized (in shares)       2,756,607      
Number of additional shares authorized (in shares)       256,607      
Percentage increase of the number of common stock shares (in percentage)       5.00%      
2019 Stock Incentive Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares authorized (in shares)       2,500,000   2,185,461