| Schedule of assets and liabilities measured at fair value on a recurring basis | 
The following tables provide information regarding the Company’s assets and liabilities measured at fair value on a recurring basis at December 27, 2014, and December 28, 2013. 
 
|  |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|   | December 27, 2014 |  
|   | Adjusted Cost |   | Unrealized Gains |   | Unrealized Losses |   | Fair Value |  
| Assets | 
 |   | 
 |   | 
 |   | 
 |  
| Level 1: | 
 |   | 
 |   | 
 |   | 
 |  
| Equity securities | $ | 2,145 | 
 |   | $ | 65 | 
 |   | $ | (282 | ) |   | $ | 1,928 | 
 |  
| Mutual funds | 3,106 | 
 |   | 2 | 
 |   | (227 | ) |   | 2,881 | 
 |  
| Subtotal | $ | 5,251 | 
 |   | $ | 67 | 
 |   | $ | (509 | ) |   | $ | 4,809 | 
 |  
| Level 2: | 
 |   | 
 |   | 
 |   | 
 |  
| Corporate fixed income | $ | 33,740 | 
 |   | $ | 6 | 
 |   | $ | (868 | ) |   | $ | 32,878 | 
 |  
| Municipal bonds | 2,441 | 
 |   | — | 
 |   | (33 | ) |   | 2,408 | 
 |  
| Certificates of deposit and time deposits | 2,439 | 
 |   | — | 
 |   | — | 
 |   | 2,439 | 
 |  
| Asset backed securities | 842 | 
 |   | — | 
 |   | (23 | ) |   | 819 | 
 |  
| Subtotal | $ | 39,462 | 
 |   | $ | 6 | 
 |   | $ | (924 | ) |   | $ | 38,544 | 
 |  
| Total | $ | 44,713 | 
 |   | $ | 73 | 
 |   | $ | (1,433 | ) |   | $ | 43,353 | 
 |  
| Liabilities | 
 |   | 
 |   | 
 |   | 
 |  
| Level 1: | 
 |   | 
 |   | 
 |   | 
 |  
| Phantom stock units | $ | 30 | 
 |   | $ | — | 
 |   | $ | — | 
 |   | $ | 30 | 
 |  
| Total | $ | 30 | 
 |   | $ | — | 
 |   | $ | — | 
 |   | $ | 30 | 
 | 
 
|  |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|   | December 28, 2013 |  
|   | Adjusted Cost |   | Unrealized Gains |   | Unrealized Losses |   | Fair Value |  
| Assets |   |   |   |   |   |   |   |  
| Level 1: |   |   |   |   |   |   |   |  
| Equity securities | $ | 2,049 | 
 |   | $ | 137 | 
 |   | $ | (64 | ) |   | $ | 2,122 | 
 |  
| Mutual funds | 3,865 | 
 |   | 19 | 
 |   | (1 | ) |   | 3,883 | 
 |  
| Subtotal | $ | 5,914 | 
 |   | $ | 156 | 
 |   | $ | (65 | ) |   | $ | 6,005 | 
 |  
| Level 2: |   |   |   |   |   |   |   |  
| Corporate fixed income | $ | 25,240 | 
 |   | $ | 126 | 
 |   | $ | (250 | ) |   | $ | 25,116 | 
 |  
| Municipal bonds | 2,775 | 
 |   | 1 | 
 |   | (28 | ) |   | 2,748 | 
 |  
| Certificates of deposit and time deposits | 4,014 | 
 |   | 1 | 
 |   | — | 
 |   | 4,015 | 
 |  
| Asset backed securities | 974 | 
 |   | — | 
 |   | (129 | ) |   | 845 | 
 |  
| Subtotal | $ | 33,003 | 
 |   | $ | 128 | 
 |   | $ | (407 | ) |   | $ | 32,724 | 
 |  
| Total | $ | 38,917 | 
 |   | $ | 284 | 
 |   | $ | (472 | ) |   | $ | 38,729 | 
 |  
| Liabilities |   |   |   |   |   |   |   |  
| Level 1: |   |   |   |   |   |   |   |  
| Phantom stock units | $ | 38 | 
 |   | $ | — | 
 |   | $ | — | 
 |   | $ | 38 | 
 |  
| Total | $ | 38 | 
 |   | $ | — | 
 |   | $ | — | 
 |   | $ | 38 | 
 |  | 
      
        | Summary of maturities of marketable securities | 
Maturities of investments at December 27, 2014 are as follows:
   
|  |  
|  |  |  |  |  |  |  |  |  
| 
 | Adjusted Cost | 
 | Fair Value |  
| Due in less than one year | $ | 19,309 | 
 | 
 | $ | 19,229 | 
 |  
| Due after one year but within five years | 14,019 | 
 | 
 | 13,611 | 
 |  
| Due after five years but within ten years | 2,794 | 
 | 
 | 2,510 | 
 |  
| Due after ten years | 3,340 | 
 | 
 | 3,194 | 
 |  
| Equity securities | 2,145 | 
 | 
 | 1,928 | 
 |  
| Mutual Funds | 3,106 | 
 | 
 | 2,881 | 
 |  
| Total | $ | 44,713 | 
 | 
 | $ | 43,353 | 
 |  |