Annual report pursuant to Section 13 and 15(d)

Stock Option Plans (Summary Of Stock Option Plans) (Detail)

v3.19.1
Stock Option Plans (Summary Of Stock Option Plans) (Detail) - shares
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2014
Stock Option Plan [Line Items]        
Stock Options Plans, Outstanding 1,546,521 1,510,244 1,084,298  
Available for future issuance under plan 4,082,584 1,045,143 1,027,375  
Totals authorized by plan 5,629,105 2,555,387 2,111,673  
2007 Plan        
Stock Option Plan [Line Items]        
Stock Options Plans, Outstanding 0 10,665 21,977  
Available for future issuance under plan 0 0 0  
Totals authorized by plan 0 10,665 21,977  
2009 Plan        
Stock Option Plan [Line Items]        
Stock Options Plans, Outstanding 110,771 117,094 132,771  
Available for future issuance under plan 0 0 0  
Totals authorized by plan 110,771 117,094 132,771  
2014 Plan        
Stock Option Plan [Line Items]        
Stock Options Plans, Outstanding 1,435,750 1,382,485 929,550  
Available for future issuance under plan 4,082,584 1,045,143 1,027,375  
Totals authorized by plan 5,518,334 2,427,628 1,956,925 1,000,000