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Commitments and Contingencies (Details Textual) (USD $) | 1 Months Ended | 3 Months Ended | 147 Months Ended | 3 Months Ended |  | 3 Months Ended
--- | --- | --- | --- | --- | --- | ---
Jul. 31, 2008 | Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2014 | Mar. 31, 2014 Westminster, Colorado | Aug. 01, 2013 Westminster, Colorado sqft | Mar. 31, 2014 Broomfield, Colorado
Commitments and Contingencies (Textual) [Abstract] |  |  |  |  |  |  |
Area of office facilities taken on lease |  |  |  |  |  | 5,300 |
Lease expiry period |  |  |  |  | Sep. 30, 2016 |  | Sep. 30, 2013
Lease term |  |  |  |  | 3 years |  |
Rent expense |  | $ 19,000 | $ 12,000 | $ 597,000 |  |  |
Clinical research agreement with Duke University, termination notice period |  | 90 days |  |  |  |  |
Expected milestone payments upon approval | 8,000,000 |  |  |  |  |  |
Another expected milestone payments upon approval | $ 5,000,000 |  |  |  |  |  |
Minimum percentage of royalty obligation | 12.50% |  |  |  |  |  |
Maximum percentage of royalty obligation | 25.00% |  |  |  |  |  |
Product sales levels royalty | 5.00% |  |  |  |  |  |
Minimum percentage of range of royalties that can be buy down | 12.50% |  |  |  |  |  |
Maximum percentage of range of royalties that can be buy down | 17.00% |  |  |  |  |  |
Milestone payment due period | 6 months |  |  |  |  |  |

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- Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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