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Note 9 - Long-term Debt (Details Textual) - USD ($) |  |  |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 24, 2016 | Jun. 30, 2014 | Aug. 02, 2013 | Oct. 31, 2011 | Jan. 31, 2015 | Dec. 31, 2015 | Dec. 31, 2014 | Feb. 12, 2013
Warrant [Member] |  |  |  |  |  |  |  |
Fair Value Assumptions, Expected Dividend Rate |  |  | 0.00% |  |  |  |  |
Fair Value Assumptions, Expected Volatility Rate |  |  | 55.54% |  |  |  |  |
Fair Value Assumptions, Risk Free Interest Rate |  |  | 0.59% |  |  |  |  |
Fair Value Assumptions, Expected Term |  |  | 3 years |  |  |  |  |
Subsequent Event [Member] | Revolving Credit Facility [Member] | Amendment 7 [Member] | PNC Bank [Member] |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 12,000,000 |  |  |  |  |  |  |
Line of Credit Facility Reduction | 1,500,000 |  |  |  |  |  |  |
Subsequent Event [Member] | Amendment 7 [Member] | PNC Bank [Member] | Term Loan [Member] |  |  |  |  |  |  |  |
Long-term Debt | 6,100,000 |  |  |  |  |  |  |
Debt Instrument, Periodic Payment, Principal | $ 102,000 |  |  |  |  |  |  |
Debt Instrument, Term | 5 years |  |  |  |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months | $ 1,486,000 |  |  |  |  |  |  |
Revolving Credit Facility [Member] | Amended Loan Agreement [Member] | PNC Bank [Member] |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  | $ 12,000,000 |  |  |  |
Revolving Credit Facility [Member] | PNC Bank [Member] |  |  |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity |  |  |  |  |  | $ 2,687,000 |  |
Line of Credit Facility Reduction |  |  |  |  |  | $ 1,500,000 |  |
Amendment 4 [Member] | PNC Bank [Member] | Term Loan [Member] |  |  |  |  |  |  |  |
Long-term Debt |  |  |  | 16,000,000 |  |  |  |
Debt Instrument, Periodic Payment, Principal |  |  |  | $ 190,000 |  |  |  |
Debt Instrument, Term |  |  |  | 7 years |  |  |  |
Amendment 6 [Member] | PNC Bank [Member] | PFSG [Member] |  |  |  |  |  |  |  |
Line of Credit Facility Reduction |  | $ 1,500,000 |  |  |  |  |  |
Proceeds from Insurance Settlement, Investing Activities |  | $ 3,850,000 |  |  |  |  |  |
Promissory Notes and Installment Agreements [Member] | TNC [Member] |  |  |  |  |  |  |  |
Debt Instrument, Annual Principal Payment |  |  |  |  |  |  |  | $ 230,000
Repayments of Unsecured Debt |  |  |  |  | $ 10,000 |  |  |
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 |  |  | 35,000 |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights |  |  | $ 2.23 |  |  |  |  |
Warrants Exercisable Term |  |  | 180 days |  |  |  |  |
Warrants Not Settleable in Cash, Fair Value Disclosure |  |  | $ 59,000 |  |  |  |  |
Stock Issued During Period, Shares, Other |  |  | 90,000 |  |  |  |  |
Number of Shares Received by each Lender |  |  | 45,000 |  |  |  |  |
Stock Issued During Period, Value, Other |  |  | $ 200,000 |  |  |  |  |
Maximum Number of Payoffs of Shares in Terms of Outstanding Equity |  |  |  |  |  | 20.00% |  |
Long-term Debt |  |  |  |  |  | $ 9,988,000 | $ 11,372,000 |
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months |  |  |  |  |  | 2,508,000 |  |
Debt Instrument, Unamortized Discount |  |  |  |  |  | $ 50,000 | $ 137,000 |
Share Price |  |  | $ 2.23 |  |  |  |  |

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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: 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) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 + Details
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