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Note 8 - Loan Payable (Details) |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jan. 07, 2015 USD ($) $ / shares shares | Jun. 30, 2015 USD ($) | Jun. 30, 2014 shares | Jun. 30, 2015 USD ($)
Note 8 - Loan Payable (Details) [Line Items] |  |  |  |
Stock Repurchased and Retired During Period, Shares (in Shares) | shares |  |  | 0 |
Stock Repurchased and Retired During Period, Value |  | $ 489,536 |  | $ 8,201,681
Line of Credit Facility, Covenant Period |  |  |  | 18 months
Dutch Auction Member |  |  |  |
Note 8 - Loan Payable (Details) [Line Items] |  |  |  |
Stock Repurchased and Retired During Period, Shares (in Shares) | shares | 193,907 |  |  |
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share) | $ / shares | $ 18.50 |  |  |
Stock Repurchased and Retired During Period, Value | $ 3,587,280 |  |  |
Stock Repurchased During Period, Transaction Costs | $ 70,000 |  |  |
2012 Demand Loan Facilities [Member] |  |  |  |
Note 8 - Loan Payable (Details) [Line Items] |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | 14,000,000 |  | $ 14,000,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  |  |  | 0.20%
DLR Loan [Member] |  |  |  |
Note 8 - Loan Payable (Details) [Line Items] |  |  |  |
Debt Instrument, Term |  |  |  | 30 days
Long-term Debt |  | 3,500,000 |  | $ 3,500,000
DLR Loan [Member] | Base Rate [Member] |  |  |  |
Note 8 - Loan Payable (Details) [Line Items] |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 1.25%
2012 DLRR Loan [Member] |  |  |  |
Note 8 - Loan Payable (Details) [Line Items] |  |  |  |
Debt Instrument, Term |  |  |  | 4 years
Proceeds from Lines of Credit |  | $ 0 |  |
2012 DLRR Loan [Member] | Base Rate [Member] |  |  |  |
Note 8 - Loan Payable (Details) [Line Items] |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 1.25%
2012 DLRR Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |
Note 8 - Loan Payable (Details) [Line Items] |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 2.50%
Amended Credit Facility [Member] |  |  |  |
Note 8 - Loan Payable (Details) [Line Items] |  |  |  |
Maximum Total Funded Debt To EBITDA Ratio |  | 2.00 |  | 2.00
Minimum Fixed Charge Coverage |  | 1.20 |  | 1.20
Line of Credit Facility Maximum Annual Capital Expenditure Ceiling |  |  |  | $ 3,600,000
Foreign Exchange Risk [Member] |  |  |  |
Note 8 - Loan Payable (Details) [Line Items] |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 3,500,000 |  | 3,500,000
Derivative Asset, Fair Value, Gross Asset |  | 24,000,000 |  | 24,000,000
Operating Demand Loan [Member] |  |  |  |
Note 8 - Loan Payable (Details) [Line Items] |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | 1,000,000 |  | 1,000,000
Debt Instrument, Fee Amount |  | 500 |  | 500
Long-term Line of Credit |  | 0 |  | $ 0
Operating Demand Loan [Member] | Base Rate [Member] |  |  |  |
Note 8 - Loan Payable (Details) [Line Items] |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 1.25%
Maximum [Member] | 2012 Demand Loan Facilities [Member] |  |  |  |
Note 8 - Loan Payable (Details) [Line Items] |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 14,000,000 |  | $ 14,000,000
Line of Credit Facility Share Repurchase Limit |  |  |  | $ 2,000,000

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + 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 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 + Details
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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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