Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	8,104,757	166,373
Common stock, shares outstanding (in shares)	8,104,757	166,373
Series A Convertible Preferred Stock
Convertible preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Convertible preferred stock, shares authorized (in shares)	60,000,000	60,000,000
Convertible preferred stock, shares issued (in shares)	0	36,196,193
Convertible preferred stock, shares outstanding (in shares)	0	36,196,193
Convertible preferred stock, aggregate liquidation preference	$ 0	$ 74,202

Face amount or stated value per share of common stock.

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