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Earnings Per Share ("EPS") - Schedule of Reconciliation of Weighted Average Shares Used in Diluted EPS (Detail) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Earnings Per Share [Line Items]        
Weighted average common shares-basic 19,215,392 18,834,886 19,149,523 18,790,612
Effect of dilutive securities        
Weighted average common shares-diluted 19,215,392 18,834,886 19,271,467 19,179,057
Stock Options And Stock Purchase Plan [Member]        
Effect of dilutive securities        
Effect of dilutive securities     57,249 259,967
Restricted Stock Units [Member]        
Effect of dilutive securities        
Effect of dilutive securities     64,695 128,478