Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Long-term Debt (Details Textual)

v3.4.0.3
Note 6 - Long-term Debt (Details Textual)
 3 Months Ended 12 Months Ended
May. 23, 2016
USD ($)
Apr. 01, 2016
USD ($)
Mar. 24, 2016
USD ($)
Aug. 02, 2013
USD ($)
$ / shares
shares
Oct. 31, 2011
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Jul. 28, 2014
USD ($)
Subsequent Event [Member] | Revised Loan Agreement [Member] | PNC Bank [Member] | Term Loan [Member]                
Debt Instrument, Periodic Payment, Principal   $ 101,600            
Subsequent Event [Member] | Revised Loan Agreement [Member] | PNC Bank [Member]                
Payments of Debt Issuance Costs $ 5,000              
Revised Loan Agreement [Member] | PNC Bank [Member] | Term Loan [Member] | Prime Rate [Member]                
Debt Instrument, Basis Spread on Variable Rate     2.25%          
Revised Loan Agreement [Member] | PNC Bank [Member] | Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member]                
Debt Instrument, Basis Spread on Variable Rate     3.25%          
Revised Loan Agreement [Member] | PNC Bank [Member] | Term Loan [Member]                
Long-term Debt     $ 6,100,000          
Debt Instrument, Term     5 years          
Revised Loan Agreement [Member] | PNC Bank [Member] | Revolving Credit Facility [Member] | Prime Rate [Member]                
Debt Instrument, Basis Spread on Variable Rate     1.75%          
Revised Loan Agreement [Member] | PNC Bank [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]                
Debt Instrument, Basis Spread on Variable Rate     2.75%          
Revised Loan Agreement [Member] | PNC Bank [Member] | Revolving Credit Facility [Member]                
Line of Credit Facility, Maximum Borrowing Capacity     $ 12,000,000          
Release of Borrowing Reduction on Line of Credit     $ 1,000,000          
Revised Loan Agreement [Member] | PNC Bank [Member] | Interest Expense [Member]                
Gain (Loss) on Extinguishment of Debt           $ (68,000)    
Revised Loan Agreement [Member] | PNC Bank [Member] | On or Before March 23, 2017 [Member]                
Debt Instrument Percentage of Total Finacing to be Paid Upon Early Retirement of Debt Obligations     1.00%          
Revised Loan Agreement [Member] | PNC Bank [Member] | After March 23, 2017 But Prior to or on March 23, 2018 [Member]                
Debt Instrument Percentage of Total Finacing to be Paid Upon Early Retirement of Debt Obligations     0.50%          
Revised Loan Agreement [Member] | PNC Bank [Member] | After March 23, 2019 [Member]                
Debt Instrument Percentage of Total Finacing to be Paid Upon Early Retirement of Debt Obligations     0.00%          
Revised Loan Agreement [Member] | PNC Bank [Member] | After March 23, 2018 But Prior to or on March 23, 2019 [Member]                
Debt Instrument Percentage of Total Finacing to be Paid Upon Early Retirement of Debt Obligations     0.25%          
Revised Loan Agreement [Member] | PNC Bank [Member]                
Payments of Debt Issuance Costs     $ 70,000          
Debt Instrument, Termination Notice     90 days          
Line of Credit Facility, Remaining Borrowing Capacity           $ 2,740,000    
Debt Instrument, Covenant, Fixed Charge Coverage Ratio           1.15    
Promissory Note Dated August 2, 2013 [Member]                
Debt Instrument, Unamortized Discount           $ 29,000 $ 50,000  
Term Loan [Member]                
Debt Issuance Costs, Net           121,000 $ 152,000  
Amended Loan Agreement [Member] | PNC Bank [Member] | Term Loan [Member] | Prime Rate [Member]                
Debt Instrument, Basis Spread on Variable Rate         2.50%      
Amended Loan Agreement [Member] | PNC Bank [Member] | Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member]                
Debt Instrument, Basis Spread on Variable Rate         3.50%      
Amended Loan Agreement [Member] | PNC Bank [Member] | Revolving Credit Facility [Member] | Prime Rate [Member]                
Debt Instrument, Basis Spread on Variable Rate         2.00%      
Amended Loan Agreement [Member] | PNC Bank [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]                
Debt Instrument, Basis Spread on Variable Rate         3.00%      
Amended Loan Agreement [Member] | PNC Bank [Member] | Revolving Credit Facility [Member]                
Line of Credit Facility, Maximum Borrowing Capacity         $ 12,000,000      
Amendment 4 [Member] | PNC Bank [Member] | Term Loan [Member]                
Debt Instrument, Periodic Payment, Principal         190,000      
Long-term Debt         $ 16,000,000      
Debt Instrument, Term         7 years      
Amendment 6 [Member] | PNC Bank [Member] | Revolving Credit Facility [Member]                
Line of Credit Facility Reduction           $ 500,000   $ 1,500,000
Term Loan [Member] | Prime Rate [Member]                
Debt Instrument, Basis Spread on Variable Rate           2.25% [1],[2]  
Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member]                
Debt Instrument, Basis Spread on Variable Rate           3.25% [1],[2]  
Term Loan [Member]                
Debt Instrument, Periodic Payment, Principal [1],[2]           $ 190,000 $ 190,000  
Long-term Debt [3]           5,974,000 6,514,000  
Promissory Note Dated August 2, 2013 [Member] | Lenders [Member]                
Proceeds from Issuance of Long-term Debt       $ 3,000,000        
Number of Shares Issued to Each Lender on Warrant | shares       35,000        
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares       $ 2.23        
Number of Shares Received by each Lender | shares       45,000        
Promissory Note Dated August 2, 2013 [Member]                
Debt Instrument, Periodic Payment, Principal [4],[5]           125,000 125,000  
Long-term Debt           596,000 950,000  
Long-term Debt           $ 9,105,000 $ 9,836,000  
Debt Instrument, Annual Spending Limit for Capital Spending     $ 3,000,000   $ 6,000,000      
[1] Our Revolving Credit facility is collateralized by our accounts receivable and our Term Loan is collateralized by our property, plant, and equipment.
[2] See below "Revolving Credit and Term Loan Agreement" for payment interest options prior to March 24, 2016. Effective April 1, 2016, the monthly installment payment under the Term Loan became $101,600 as a result of the March 24, 2016 amendment to the loan agreement as discussed below.
[3] Net of debt issuance costs of ($121,000) and ($152,000) at March 31, 2016 and December 31, 2015, respectively.
[4] Net of debt discount of ($29,000) and ($50,000) at March 31, 2016 and December 31, 2015, respectively. See "Promissory Notes and Installment Agreements" below for additional information.
[5] Uncollateralized note.