Annual report pursuant to Section 13 and 15(d)

Restructuring Charges (Narrative) (Details)

v3.7.0.1
Restructuring Charges (Narrative) (Details) - USD ($)
1 Months Ended 12 Months Ended
Nov. 30, 2015
Dec. 31, 2016
Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]      
Reduction in workforce (as a percentage)   20.00%  
Value of stock options fair value modification     $ 959,000
Modification of stock options related to restructuring activities   480,000
General And Administrative Expense [Member]      
Restructuring Cost and Reserve [Line Items]      
Modification of stock options related to restructuring activities     542,000
Research And Development Expense [Member]      
Restructuring Cost and Reserve [Line Items]      
Modification of stock options related to restructuring activities     $ 417,000
Loan And Security Agreement [Member]      
Restructuring Cost and Reserve [Line Items]      
Repayments of debt $ 6,600,000