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Subsequent events	12 Months Ended
Subsequent events	Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent events	Subsequent events On February 13, 2020, the Company completed a public offering of 10,350,000 shares of common stock for net proceeds of approximately $14.5 million. On March 2, 2020, the Company settled an outstanding legal claim against a third party with gross proceeds to the Company of $1.2 million.