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Subsequent Event	12 Months Ended
	Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent Event	20. Subsequent Event On March 11, 2020, we entered into a warrant exchange agreement with Bain Capital Life Sciences Fund, L.P. and BCIP Life Sciences Associates, L.P. (together, “Bain Life Sciences”) pursuant to which we agreed that we would, upon future notice from Bain Life Sciences, to exchange all or a portion of the common stock warrants held by Bain Life Sciences for warrants to purchase a new Series C convertible preferred stock. Each share of Series C convertible preferred stock would be convertible into 1,000 shares of common stock, with a conversion price of $4.50 and would have substantially identical rights to, our Series B Convertible Preferred Stock.

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- Definition

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

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