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Note 6 - Loan Payable (Detail) (USD $) | 0 Months Ended | 3 Months Ended | 9 Months Ended |  | 12 Months Ended | 3 Months Ended |  | 3 Months Ended |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 15, 2011 | Mar. 31, 2013 | Mar. 31, 2012 | Sep. 30, 2012 | Dec. 31, 2012 | Dec. 31, 2012 Stock Repurchase [Member] | Mar. 31, 2013 Dutch Auction Member | Mar. 31, 2012 Dutch Auction Member | Dec. 31, 2012 Bank of Montreal (“BMO”) U.S. Base Rate Plus Percent [Member] | Dec. 31, 2012 LIBOR Plus Percent [Member] | Mar. 31, 2013 Foreign Exchange Risk [Member] | Mar. 31, 2013 Operating Demand Loan [Member] | Mar. 31, 2013 DLR Loan [Member] | Dec. 31, 2012 DLR Loan [Member] | Dec. 31, 2012 Revolving Demand Loan Facilities [Member]
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  |  | $ 3,500,000 | $ 1,000,000 |  | $ 14,000,000 | $ 14,000,000
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  | 1.25% | 2.50% |  | 1.25% |  | 1.25% |
Line of Credit Facility Share Repurchase Limit |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,000,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  |  |  |  |  | 0.20% |  |  |  |  |  |  |  |  |
Line of Credit Facility Maturity |  |  |  | 4 years |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Amount Outstanding | 5,200,000 | 5,200,000 |  |  |  |  |  |  |  |  |  | 0 | 2,900,000 | 3,700,000 |
Line of Credit Facility, Increase, Additional Borrowings |  |  | 5,200,000 |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchased During Period, Shares (in Shares) |  |  |  |  |  |  |  | 4,114,121 |  |  |  |  |  |  |
Share Price (in Dollars per share) |  |  |  |  |  |  |  | $ 1.50 |  |  |  |  |  |  |
Stock Repurchased and Retired During Period, Value | 6,171,656 | 822,887 |  |  |  |  | 6,171,656 |  |  |  |  |  |  |  |
Stock Repurchased And Retired During Period Transaction Cost |  |  |  |  |  |  | 106,000 |  |  |  |  |  |  |  |
Line of Credit Facility, Covenant Period |  |  |  |  |  |  |  |  |  |  | 18 months |  |  |  |
Derivative Asset, Fair Value, Gross Asset |  | (192,144) |  |  | 444,782 |  |  |  |  |  | 23,300,000 |  |  |  |
Line of Credit Facility, Monitoring Fee |  |  |  |  |  |  |  |  |  |  |  | 500 |  |  |
Maximum Total Funded Debt To EBITDA Ratio |  | 2.00:1 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Maximum Annual Capital Expenditure Ceiling |  |  |  | $ 3,600,000 |  |  |  |  |  |  |  |  |  |  |

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- Definition Line of Credit Facility Share Repurchase Limit. + References No definition available. + Details
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- Definition Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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