Annual report pursuant to Section 13 and 15(d)

Consolidated Financial Statement Detail - Additional Information 5 (Details)

v3.6.0.2
Consolidated Financial Statement Detail - Additional Information 5 (Details) - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]      
Depreciation and amortization expense $ 800,000 $ 1,500,000 $ 1,900,000
Property and equipment related cost   15,900,000  
Accumulated Depreciation and Amortization 13,541,000 15,453,000  
Impairment of property and equipment 198,000 0 0
Equipment and Furniture [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment under capital lease 300,000    
Accumulated amortization 100,000    
Construction-in-Progress [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment under capital lease   200,000  
Accumulated amortization   0  
Land, Building and Certain Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Accumulated Depreciation and Amortization   13,700,000  
Leasehold Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Impairment of property and equipment $ 200,000 0 $ 0
Other Income (Expense), Net [Member]      
Property, Plant and Equipment [Line Items]      
Gain on sale of property and equipment   $ 3,500,000