Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Stock-Based Compensation Expense Recognized) (Details)

v3.7.0.1
Stockholders' Equity (Stock-Based Compensation Expense Recognized) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Stock-based compensation expense $ 844 $ 1,971
General And Administrative Expense [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Stock-based compensation expense 547 1,134
Research And Development Expense [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Stock-based compensation expense $ 297 $ 837