Quarterly report pursuant to Section 13 or 15(d)

17. Short term debt (Details Narrative)

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17. Short term debt (Details Narrative) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2018
Jul. 01, 2017
Dec. 30, 2017
Debt and capital lease obligations $ 646   $ 5,577
Debt maturity date Aug. 18, 2018    
Repayments of line of credit $ 0 $ 10,333  
Debt issuance costs 0 344  
GE 8.00% notes [Member]      
Debt and capital lease obligations 482   482
Energy Efficiency Investments [Member] | Term Loan [Member]      
Debt and capital lease obligations $ 103   103
Debt issuance date Nov. 08, 2016    
Debt face amount     7,732
Debt issuance costs $ 740    
Unamortized debt issuance costs 493   568
AFCO Credit Corp [Member] | Term Loan [Member]      
Debt and capital lease obligations $ 556   367
Debt issuance date Jun. 16, 2017    
Debt face amount     1,070
Debt interest rate description 3.567%    
MidCap Financial Trust [Member] | Term Loan [Member]      
Debt and capital lease obligations $ 0   3,616
Debt issuance date May 10, 2017    
Debt interest rate description one month LIBOR plus 4.50%    
Debt maturity date Aug. 18, 2018    
Maximum borrowing capacity     12,000
Available borrowing capacity under the Credit Agreement     1,031
Proceeds from line of credit $ 21,470    
Repayments of line of credit 27,075    
Debt issuance costs 546    
Unamortized debt issuance costs $ 395    
PNC Bank [Member] | Term Loan [Member]      
Debt and capital lease obligations   $ 1,020 $ 0