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Organization and Summary of Significant Accounting Policies (Details Textual) (USD $)
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3 Months Ended | 6 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | ||||||
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Jun. 30, 2014
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Jun. 30, 2014
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Jun. 30, 2013
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Jun. 30, 2014
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Jun. 30, 2013
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Nov. 12, 2013
Collaborative Arrangement Co-promotion [Member]
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Dec. 31, 2012
Collaborative Arrangement Co-promotion [Member]
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| Schedule of Organization and Summary of Significant Accounting Policies [Line Items] | |||||||||||
| Non-refundable up-front payment | $ 15,750,000 | ||||||||||
| License and services revenue | 15,000,000 | ||||||||||
| Milestone payment | 15,000,000 | ||||||||||
| Additional amount received upon achievement of sales milestones | 165,000,000 | 165,000,000 | |||||||||
| Additional amount in regulatory milestones | 35,000,000 | 35,000,000 | |||||||||
| Cash | 8,853,000 | 8,853,000 | 11,176,000 | 8,853,000 | 11,176,000 | 11,798,000 | 18,102,000 | 5,406,000 | 3,180,000 | ||
| Non-cash stock-based compensation expense | 386,000 | 635,000 | 678,000 | 2,581,000 | 1,177,000 | ||||||
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total | 800,000 | 5,100,000 | 2,600,000 | 11,100,000 | 9,700,000 | 15,200,000 | 15,200,000 | ||||
| Non-Cash Gain (Loss) on Changes in Fair Value of Warrants | $ (284,000) | $ 5,362,000 | $ (1,148,000) | $ 2,317,000 | $ 1,737,000 | $ (1,766,000) | $ 1,862,000 | ||||