Annual report pursuant to Section 13 and 15(d)

Organization and Summary of Significant Accounting Policies - Schedule of Estimated Useful Life of Assets Used to Compute Depreciation Using the Straight-Line Method (Detail)

v3.19.1
Organization and Summary of Significant Accounting Policies - Schedule of Estimated Useful Life of Assets Used to Compute Depreciation Using the Straight-Line Method (Detail)
12 Months Ended
Dec. 31, 2018
Buildings [Member] | Minimum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of assets 10 years
Buildings [Member] | Maximum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of assets 20 years
Leasehold Improvements [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of assets Remaining lease period
Office Furniture and Equipment [Member] | Minimum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of assets 5 years
Office Furniture and Equipment [Member] | Maximum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of assets 7 years
Assets under Capital Lease [Member] | Minimum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of assets 4 years
Assets under Capital Lease [Member] | Maximum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of assets 20 years
Computer Equipment and Software [Member] | Minimum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of assets 3 years
Computer Equipment and Software [Member] | Maximum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of assets 5 years