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Common stock (Tables)
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12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2014
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| Common stock. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of shares of common stock reserved for the issuance of common stock for vested restricted stock units and the exercise of stock options | As of December 31, 2013 and 2014, the Company had reserved the following shares of common stock for the issuance of common stock for vested restricted stock units, the exercise of stock options, and an outstanding warrant (in thousands):
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