Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Fair Value of Financial Instruments) (Details)

v3.7.0.1
Summary of Significant Accounting Policies (Fair Value of Financial Instruments) (Details) - Fair Value Measurements Recurring [Member] - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Estimate Of Fair Value Fair Value Disclosure [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total assets measured at fair value $ 101 $ 196
Estimate Of Fair Value Fair Value Disclosure [Member] | Money Market Funds [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total assets measured at fair value 101 196
Fair Value, Inputs, Level 1 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total assets measured at fair value 101 196
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total assets measured at fair value 101 196
Fair Value, Inputs, Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total assets measured at fair value
Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total assets measured at fair value
Fair Value, Inputs, Level 3 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total assets measured at fair value
Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total assets measured at fair value