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Convertible Notes, Long-Term Debt and Credit Facility - Additional Disclosures (Details) (USD $) | 0 Months Ended | 1 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jan. 22, 2013 | Jun. 30, 2012 | Nov. 30, 2011 | Mar. 31, 2013 | Dec. 31, 2012 | Feb. 11, 2008
Debt Disclosure [Abstract] |  |  |  |  |  |
Share lending agreement, number of common stock shares loaned |  |  |  | 3,800,000 |  | 3,800,000
Own share lending arrangement nominal loan fee per share |  |  |  |  |  | $ 0.0001
Share lending agreement, fair value |  |  |  |  |  | $ 500,000
Return of borrowed shares, in shares | 2,439,558 | 659,340 | 701,102 |  |  |
Capital lease obligations |  |  |  | $ 1,944,000 | $ 1,784,000 |

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- Definition Own share lending arrangement nominal loan fee per share. + References No definition available. + Details
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- Definition Own share lending arrangement shares returned. + References No definition available. + Details
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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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- Details
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- Definition The number of shares issued in connection with an own-share lending arrangement entered into by the entity, in contemplation of a convertible debt offering or other financing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 2A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=7656903&loc=SL6757479-112611 + Details
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- Definition The fair value as of the date of the statement of financial position of shares outstanding in connection with an own-share lending arrangement, in contemplation of a convertible debt offering or other financing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 2A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7656903&loc=SL6757479-112611 + Details
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