Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Long Term Debt (Details Textual)

v3.5.0.2
Note 7 - Long Term Debt (Details Textual)
 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 24, 2016
USD ($)
Aug. 02, 2013
USD ($)
$ / shares
shares
Oct. 31, 2011
USD ($)
Mar. 31, 2016
USD ($)
Jun. 30, 2016
USD ($)
Dec. 31, 2015
USD ($)
May 23, 2016
USD ($)
Jul. 28, 2014
USD ($)
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] | 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, 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] | Term Loan [Member] | Prime Rate [Member]                
Debt Instrument, Basis Spread on Variable Rate 2.25%       3.50%      
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]                
Debt Instrument, Periodic Payment, Principal $ 101,600     $ 190,000        
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] | Selling, General and Administrative Expenses [Member]                
Debt Instrument, Fee Amount             $ 5,000  
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         1,763,000      
Debt Instrument, Covenant, Fixed Charge Coverage Ratio       1.15        
Promissory Note Dated August 2, 2013 [Member]                
Debt Instrument, Unamortized Discount         7,000 $ 50,000    
Term Loan [Member]                
Debt Issuance Costs, Net         115,000 152,000    
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]                
Debt Instrument, Periodic Payment, Principal         102,000 102,000    
Long-term Debt [1]         5,675,000 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         125,000 125,000    
Long-term Debt         243,000 950,000    
Long-term Debt         $ 10,814,000 $ 9,836,000    
Debt Instrument, Annual Spending Limit for Capital Spending $ 3,000,000   $ 6,000,000          
[1] Net of debt issuance costs of ($115,000) and ($152,000) at June 30, 2016 and December 31, 2015, respectively.