Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt (Details Narrative)

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Long-Term Debt (Details Narrative) - USD ($)
 3 Months Ended 12 Months Ended
Apr. 02, 2019
Oct. 31, 2011
Mar. 31, 2020
Dec. 31, 2019
Debt maturity date     May 15, 2024  
Line of credit facility, remaining borrowing capacity     $ 8,537,000  
Letters of credit outstanding, amount     3,139,000  
Prepayments in principal amount     312,000 $ 520,000
Loan and Securities Purchase Agreement, Promissory Note and Subordination Agreement [Member]        
Debt outstanding $ 2,500,000      
Debt instrument, interest rate, stated percentage 4.00%      
Debt instrument, first required interest payment May 01, 2019      
Debt instrument, periodic payment, principal $ 208,333      
Prepayments in principal amount $ 832,000      
Warrants to purchase share of common stock 60,000      
Warrants exercise price $ 3.51      
Warrants, exercisable term 6 months      
Warrants, maturity date Apr. 01, 2024      
Fair value of warrants $ 93,000      
Shares issued to lender 75,000      
Fair value of shares issued to lender $ 263,000      
Debt discount and debt issuance costs $ 398,000      
Common stock, minimum closing bid price per share $ 3.51      
Common stock issued percentage 14.90%      
Loan and Securities Purchase Agreement, Promissory Note and Subordination Agreement [Member] | Private Placement [Member]        
Warrants to purchase share of common stock 60,000      
Shares issued to lender 75,000      
Term Loan [Member]        
Debt outstanding [2],[3]     $ 1,739,000 [1] $ 1,827,000
Revised Loan Agreement [Member] | PNC Bank [Member] | Term Loan [Member]        
Long-term debt   $ 6,100,000    
Term Loan Agreement [Member] | Prime [Member]        
Debt Instrument, basis spread on variable rate     2.50%  
Term Loan Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member]        
Debt Instrument, basis spread on variable rate     3.50%  
Revolving Credit Facility [Member]        
Line of credit facility, remaining borrowing capacity     $ 8,537,000  
Indefinite reduction of borrowing availability     250,000  
Letters of credit outstanding, amount     $ 3,139,000  
Revolving Credit Facility [Member] | Prime [Member]        
Debt Instrument, basis spread on variable rate     3.25%  
Revolving Credit Facility [Member] | Plus [Member]        
Debt Instrument, basis spread on variable rate     2.00%  
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]        
Debt Instrument, basis spread on variable rate     3.00%  
Revolving Credit Facility [Member] | Revised Loan Agreement [Member] | PNC Bank [Member]        
Debt maturity date   Mar. 24, 2021    
Line of credit facility, maximum borrowing capacity   $ 12,000,000    
Revolving Credit Facility [Member] | Term Loan Agreement [Member]        
Annual rate of interest description     The revolving credit is at prime (3.25% at March 31, 2020) plus 2% and the term loan at prime plus 2.5%. Prior to March 29, 2019, the Company also had the option of paying annual rate of interest due on the revolving credit of London InterBank Offer Rate ("LIBOR") plus 3% and the term loan at LIBOR plus 3.5%.  
[1] As discussed in Note 16 – "Subsequent Events – Credit Facility," on May 8, 2020, the Company entered into a new loan agreement, replacing the Revised Loan Agreement dated October 31, 2011 as discussed below, with PNC. The new loan agreement has a maturity date of May 15, 2024. In accordance with ASC 470, "Debt," this post balance-sheet date agreement demonstrated the Company's ability to refinance its short-term obligations on a long-term basis; therefore, the Company has reclassified the current portion of the outstanding debt to long-term except for $427,000 in principal payments that will be due by March 31, 2021 (see Note 16 - "Subsequent Events – Credit Facility" for further details of this new loan agreement).
[2] Net of debt issuance costs of ($74,000) and ($92,000) at March 31, 2020 and December 31, 2019, respectively.
[3] Our revolving credit facility is collateralized by our accounts receivable and our term loan is collateralized by our property, plant, and equipment. Effective July 1, 2019, monthly installment principal payment on the Term Loan was amended to approximately $35,500 from approximately $101,600.