| Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
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December 31, 2014
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December 31, 2013
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Level 1
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Level 2
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Level 3
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Total
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Level 1
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Level 2
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Level 3
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Total
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(In thousands)
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Financial Assets:
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Money market funds
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$
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4,103
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$
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—
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$
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—
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$
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4,103
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$
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6,058
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$
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—
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$
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—
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$
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6,058
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Debt securities of U.S. government agencies
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—
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43,844
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—
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43,844
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—
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49,890
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—
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49,890
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Corporate bonds
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—
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9,416
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—
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9,416
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—
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13,393
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—
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13,393
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$
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4,103
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$
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53,260
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$
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—
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$
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57,363
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$
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6,058
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$
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63,283
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$
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—
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$
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69,341
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Financial Liability:
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Restricted Share Units
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$
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310
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$
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—
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$
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—
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$
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310
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$
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337
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$
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—
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$
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—
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$
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337
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Warrants
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—
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—
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128
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128
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—
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—
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924
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924
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| Fair Value Inputs, Liabilities, Quantitative Information [Table Text Block] |
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As of December 31, 2014
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September 2010
Warrants
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Exercise price
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$
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4.24
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Market value of stock at end of period
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$
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1.90
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Expected dividend rate
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0.0
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%
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Expected volatility
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60.3
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%
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Risk-free interest rate
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0.2
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%
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Expected life (in years)
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0.78
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As of December 31, 2013
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May 2009
Warrants
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September 2010
Warrants
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Exercise price
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$
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3.74
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$
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4.24
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Market value of stock at end of period
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$
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1.76
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$
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1.76
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Expected dividend rate
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0.0
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%
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0.0
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%
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Expected volatility
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45.3
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%
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77.4
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%
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Risk-free interest rate
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0.1
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%
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0.3
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%
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Expected life (in years)
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0.40
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1.78
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