Quarterly report pursuant to Section 13 or 15(d)

11. Borrowings (Details Narrative)

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11. Borrowings (Details Narrative) - USD ($)
$ in Thousands
3 Months Ended
Apr. 01, 2017
Dec. 31, 2016
Debt and capital lease obligations $ 3,894 $ 4,919
Capital leased equipment cost 2,601 2,601
Accumulated amortization of capital leased equipment 2,131 1,771
Term Loan [Member] | PNC Bank [Member]    
Debt and capital lease obligations $ 0 1,020
Debt issuance date Jan. 24, 2011  
Debt interest rate description PNC Base Rate plus 2.25% to 3.75%, or 1-, 2- or 3-month PNC LIBOR Rate plus 3.25% to 4.75%, with the rate being dependent on our level of fixed charge coverage.  
Debt maturity date Jan. 31, 2017  
Term Loan [Member] | Susquehanna Bank [Member]    
Debt and capital lease obligations $ 3,242 $ 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 6.00% 6.00%
Debt maturity date Mar. 10, 2021  
Term Loan [Member] | 2.75% note [Member]    
Debt and capital lease obligations $ 300 $ 319
Debt issuance date Mar. 15, 2015  
Debt face amount   325
Debt interest rate description 8%  
Convertible Promissory Note [Member] | Energy Efficiency Investments [Member]    
Debt and capital lease obligations $ 100 $ 100
Debt issuance date Nov. 08, 2016  
Debt interest rate description 8% per annum