Quarterly report pursuant to Section 13 or 15(d)

10. Long term obligations (Details Narrative)

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10. Long term obligations (Details Narrative) - USD ($)
$ in Thousands
6 Months Ended
Jul. 01, 2017
Dec. 31, 2016
Debt and capital lease obligations $ 5,419 $ 4,919
Capital leased equipment cost 2,527 2,601
Accumulated amortization of capital leased equipment 1,752 1,771
Line of credit outstanding 0 10,333
Term Loan [Member] | PNC Bank [Member]    
Debt and capital lease obligations $ 0 1,020
Debt issuance date Jan. 24, 2011  
Debt maturity date Jan. 31, 2017  
Term Loan [Member] | MidCap Financial Trust [Member]    
Debt and capital lease obligations $ 1,066  
Debt issuance date May 10, 2017  
Debt interest rate description one month LIBOR plus 4.50%  
Weighted average interest rate 5.73%  
Line of credit outstanding $ 2,517  
Maximum borrowing capacity 12,000  
Available borrowing capacity under the Credit Agreement 2,517  
Proceeds from line of credit 16,030  
Repayments of line of credit 14,964  
Term Loan [Member] | AFCO Credit Corp [Member]    
Debt and capital lease obligations $ 820 0
Debt issuance date Jun. 16, 2017  
Debt face amount $ 1,070  
Debt interest rate description 3.567%  
Term Loan [Member] | Susquehanna Bank [Member]    
Debt and capital lease obligations $ 3,242  
Debt issuance date Mar. 10, 2011  
Debt face amount $ 4,750  
Debt interest rate description Prime plus 2.75%  
Weighted average interest rate 6.50%  
Debt maturity date Mar. 10, 2021  
Term Loan [Member] | Energy Efficiency Investments [Member]    
Debt and capital lease obligations $ 103 $ 103
Debt issuance date Nov. 08, 2016  
Debt face amount $ 7,732