Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments (Fair Value of Financial Assets) (Details)

v3.7.0.1
Fair Value of Financial Instruments (Fair Value of Financial Assets) (Details) - Fair Value Measurements Recurring [Member] - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
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
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 1 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total assets measured at fair value 101 101
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 101 101
Estimate Of Fair Value Fair Value Disclosure [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total assets measured at fair value 101 101
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 $ 101