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Subsequent Event	3 Months Ended
Subsequent Event	Mar. 31, 2017
Subsequent Event [Abstract]
Subsequent Event	13. Subsequent Event On May 2 and May 3, 2017, the Company received aggregate net proceeds of approximately $13.9 million from the sale and issuance of 30 million shares of common stock. In April, the Company received net proceeds of approximately $1.9 million from the exercise of warrants.