XML 48 R30.htm IDEA: XBRL DOCUMENT v3.20.1
Stockholders' Equity - Additional Information (Details)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2020
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Non-vested options outstanding | shares 14,530
Weighted average  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Weighted average grant date fair value (in dollars per share) | $ / shares $ 31.27
Unrecognized compensation cost related to non-vested stock options expected to be recognized | $ $ 30.5
Expected vesting period for non-vested share-based compensation 3 years 7 months 6 days