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Financial Instruments (Tables) | 6 Months Ended
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Jun. 30, 2012
Financial Instruments [Abstract] |
Financial Instruments |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized (Losses) |  |  | Fair Value |
June 30, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  | $ | 192,843 |  |  | $ | — |  |  | $ | — |  |  | $ | 192,843 |
Cash equivalents |  |  | 7,010,586 |  |  |  | — |  |  |  | — |  |  |  | 7,010,586 |
Marketable debt securities, current |  |  | 1,699,885 |  |  |  | — |  |  |  | (71 | ) |  |  | 1,699,814 |
Total cash, cash equivalents, and marketable securities |  | $ | 8,903,314 |  |  | $ | — |  |  | $ | (71 | ) |  | $ | 8,903,243 |
December 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  | $ | 291,093 |  |  | $ | — |  |  | $ | — |  |  | $ | 291,093 |
Cash equivalents |  |  | 13,020,168 |  |  |  | — |  |  |  | — |  |  |  | 13,020,168 |
Marketable debt securities, current |  |  | 3,283,209 |  |  |  | — |  |  |  | (2,618 | ) |  |  | 3,280,591 |
Total cash, cash equivalents, and marketable securities |  | $ | 16,594,470 |  |  | $ | — |  |  | $ | (2,618 | ) |  | $ | 16,591,852 |

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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27232-111563 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 210.5-02.2,12) -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 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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