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Note 9 - Long-term Debt Instruments (Details) (Parentheticals) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Revolving Credit [Member] | Prime Rate [Member] |  |  |
Debt Instrument, Basis Spread on Variable Rate | [1] | 2.00% | 2.00%
Revolving Credit [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |
Debt Instrument, Basis Spread on Variable Rate | [1] | 3.00% | 3.00%
Revolving Credit [Member] |  |  |
Reference rate | [1] | 3.50% | 3.50%
Effective interest rate | [1] | 4.00% | 4.10%
Term Loan [Member] | Prime Rate [Member] |  |  |
Debt Instrument, Basis Spread on Variable Rate | [1] | 2.50% | 2.50%
Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |
Debt Instrument, Basis Spread on Variable Rate | [1] | 3.50% | 3.50%
Term Loan [Member] |  |  |
Effective interest rate | [1] | 3.70% | 3.70%
Periodic payment, principal | [1] | $ 190 | $ 190
Promissory Note Dated August 2, 2013 [Member] |  |  |
Effective interest rate | [2],[3] | 2.99% | 2.99%
Periodic payment, principal | [2],[3] | $ 125 | $ 125
Number of monthly installments, interest only | [2],[3] | 12 | 12
Number of monthly installments | [2],[3] | 24 | 24
Promissory Note Dated February 12, 2013 ("New Note") [Member] |  |  |
Effective interest rate | [3] | 6.00% | 6.00%
Periodic payment, principal | [3] | $ 10 | $ 10
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] | Net of debt discount of ($50,000) and ($137,000) at December 31, 2015 and December 31, 2014, respectively. See "Promissory Notes and Installment Agreements" below for additional information.
[3] | Uncollateralized note.

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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 + Details
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