Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments (Details)

v3.5.0.2
Fair Value of Financial Instruments (Details) - USD ($)
Jul. 02, 2016
Jan. 02, 2016
Assets    
Asset measured at, fair value $ 35,641,000  
Recurring [Member]    
Assets    
Assets measured at fair value, Adjusted cost 39,201,000 $ 46,207,000
Assets measured at fair value, Unrealized gains 180,000 37,000
Assets measured at fair value, Unrealized losses (1,147,000) (2,070,000)
Asset measured at, fair value 38,234,000 44,174,000
Recurring [Member] | Level 1 [Member]    
Assets    
Assets measured at fair value, Adjusted cost 2,847,000 3,929,000
Assets measured at fair value, Unrealized gains 48,000 29,000
Assets measured at fair value, Unrealized losses (302,000) (274,000)
Asset measured at, fair value 2,593,000 3,684,000
Recurring [Member] | Level 1 [Member] | Equity securities [Member]    
Assets    
Assets measured at fair value, Adjusted cost 638,000 1,318,000
Assets measured at fair value, Unrealized gains 12,000 28,000
Assets measured at fair value, Unrealized losses (35,000) (36,000)
Asset measured at, fair value 615,000 1,310,000
Recurring [Member] | Level 1 [Member] | Mutual funds [Member]    
Assets    
Assets measured at fair value, Adjusted cost 2,209,000 2,611,000
Assets measured at fair value, Unrealized gains 36,000 1,000
Assets measured at fair value, Unrealized losses (267,000) (238,000)
Asset measured at, fair value 1,978,000 2,374,000
Recurring [Member] | Level 2 [Member]    
Assets    
Assets measured at fair value, Adjusted cost 36,354,000 42,278,000
Assets measured at fair value, Unrealized gains 132,000 8,000
Assets measured at fair value, Unrealized losses (845,000) (1,796,000)
Asset measured at, fair value 35,641,000 40,490,000
Liabilities    
Liabilities measured at fair value, Unrealized gains 0 0
Liabilities measured at fair value, Unrealized losses 0 0
Liabilities measured at fair value 21,000 17,000
Convertible Debt, Fair Value Disclosures 21,000 17,000
Recurring [Member] | Level 2 [Member] | Corporate fixed income [Member]    
Assets    
Assets measured at fair value, Adjusted cost 31,649,000 35,936,000
Assets measured at fair value, Unrealized gains 121,000 8,000
Assets measured at fair value, Unrealized losses (803,000) (1,682,000)
Asset measured at, fair value 30,967,000 34,262,000
Recurring [Member] | Level 2 [Member] | Municipal bonds [Member]    
Assets    
Assets measured at fair value, Adjusted cost 2,979,000 2,897,000
Assets measured at fair value, Unrealized gains 9,000 0
Assets measured at fair value, Unrealized losses (41,000) (94,000)
Asset measured at, fair value 2,947,000 2,803,000
Recurring [Member] | Level 2 [Member] | Certificates of deposit [Member]    
Assets    
Assets measured at fair value, Adjusted cost 1,324,000 2,947,000
Assets measured at fair value, Unrealized gains 0 0
Assets measured at fair value, Unrealized losses 0 0
Asset measured at, fair value 1,324,000 2,947,000
Recurring [Member] | Level 2 [Member] | Asset backed securities [Member]    
Assets    
Assets measured at fair value, Adjusted cost 402,000 498,000
Assets measured at fair value, Unrealized gains 2,000 0
Assets measured at fair value, Unrealized losses (1,000) (20,000)
Asset measured at, fair value 403,000 478,000
Recurring [Member] | Level 2 [Member] | Phantom Share Units (PSUs) [Member]    
Assets    
Liabilities Measured at Fair Value Adjusted Cost 21,000 17,000
Liabilities    
Liabilities measured at fair value, Unrealized gains 0 0
Liabilities measured at fair value, Unrealized losses 0 0
Liabilities measured at fair value $ 21,000 $ 17,000