Annual report pursuant to Section 13 and 15(d)

Lease Obligations (Details Textual)

v3.6.0.2
Lease Obligations (Details Textual) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
May 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Operating Leased Assets [Line Items]        
Lease expiration year, Maximum   2023    
Rent expense   $ 300 $ 400 $ 700
Lease exit and termination costs   1,032 1,020 1,084
Rent expense, net of sublease income   1,700 3,300  
Adjustment for accretion and changes in lease assumptions   700 900 $ 1,100
Corporate Headquarters - San Diego, CA | CALIFORNIA        
Operating Leased Assets [Line Items]        
Rent expense $ 100      
Initial term of lease 7 years      
Annual escalation of operating lease (percent) 3.00%      
Renewal term of lease 5 years      
Contract Termination        
Operating Leased Assets [Line Items]        
Lease exit and termination costs   $ 0 $ 900