| Schedule of Quarterly Financial Information [Table Text Block] |
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Three Months Ended,
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March 31
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June 30
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September 30
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December 31
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(In thousands, except per share data)
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2014
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Operating expenses(1)
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$
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7,160
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$
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7,797
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$
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8,020
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$
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27,858
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Net loss(1)(2)
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(9,616
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)
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(6,032
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)
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(6,736
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)
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(27,578
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)
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Net loss per share — basic and diluted
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(0.14
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)
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(0.09
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)
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(0.09
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)
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(0.30
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)
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2013
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Operating expenses(3)
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$
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7,991
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$
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18,047
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$
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7,602
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$
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7,583
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Net loss(3)(4)
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(8,288
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)
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(16,398
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)
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(7,710
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)
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(6,363
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)
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Net loss per share — basic and diluted
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(0.14
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)
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(0.28
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)
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(0.12
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)
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(0.09
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)
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