Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Long-term Debt Instruments (Details) (Parentheticals)

v3.4.0.3
Note 6 - Long-term Debt Instruments (Details) (Parentheticals) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Revolving Credit [Member] | Prime Rate [Member]    
Debt Instrument, Basis Spread on Variable Rate 1.75% [1],[2]
Revolving Credit [Member] | London Interbank Offered Rate (LIBOR) [Member]    
Debt Instrument, Basis Spread on Variable Rate 2.75% [1],[2]
Revolving Credit [Member]    
Reference rate [1],[2] 3.50% 3.50%
Effective interest rate 4.60% [1],[2]
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]    
Effective interest rate 3.60% [1],[2]
Debt Instrument, Periodic Payment, Principal [1],[2] $ 190,000 $ 190,000
Promissory Note Dated August 2, 2013 [Member]    
Effective interest rate [3],[4] 2.99% 2.99%
Debt Instrument, Periodic Payment, Principal [3],[4] $ 125,000 $ 125,000
Capital Lease Obligations [Member]    
Effective interest rate 6.00% 6.00%
[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 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.
[4] Uncollateralized note.