Annual report pursuant to Section 13 and 15(d)

Property and Equipment (Detail)

v3.6.0.2
Property and Equipment (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Property and Equipment, Gross $ 49,352 $ 46,495
Accumulated depreciation (32,019) (29,528)
Total 17,333 16,967
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property and Equipment, Gross 2,856 2,918
Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Property and Equipment, Gross 5,219 5,662
Leasehold improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and Equipment, Gross 2,386 2,345
Office furniture and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and Equipment, Gross 18,398 15,602
Computer software and hardware [Member]    
Property, Plant and Equipment [Line Items]    
Property and Equipment, Gross 9,100 8,752
Demonstration and loaned equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and Equipment, Gross $ 11,393 $ 11,216