Long-Term Obligations (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Jun. 30, 2013
USD ($)
Dec. 31, 2015
USD ($)
item
Long-Term Obligations    
Variable interest rate basis   Prime rate
Future principal payments    
2016   $ 727
2017   186
Total   $ 913
Revolving credit facility    
Long-Term Obligations    
Maximum borrowing capacity $ 13,000  
Term borrowings    
Long-Term Obligations    
Interest rate at the end of period (as a percent)   4.00%
Number of equal monthly payments of principal plus interest | item   42
Term borrowings | Prime rate    
Long-Term Obligations    
Basis spread on variable rate (as a percent) 0.50%