XML 80 R93.htm IDEA: XBRL DOCUMENT v3.20.1
Stock-based Payment Arrangements - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2009
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum option term 10 years      
Award vesting period 5 years      
Unrecognized compensation cost $ 524      
Unrecognized compensation cost, period for recognition 3 years 3 months 18 days      
Compensation and benefits expense $ 200 $ 168 $ 162  
2009 Stock Option Plan | Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum number of shares issuable under the Stock Option Plan 892,687      
2009 Recognition and Retention Plan | Restricted Stock Awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum number of shares issuable under the Stock Option Plan 357,075      
Percent of outstanding common to be approved for restricted stock awards under the RRP (percent) 4.00%      
Award vesting period 5 years      
Unrecognized compensation cost $ 1,437      
Compensation and benefits expense 602 $ 573 $ 354  
Average cost of shares in open market required to fund the 2009 plan (in usd per share)       $ 11.81
Total cost of shares held by the 2009 plan $ 35      
2014 Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares available for grant (shares) 350,000