Condensed Consolidated Balance Sheets (Parenthetical)	Sep. 30, 2020 $ / shares shares	Dec. 31, 2019 $ / shares shares	Apr. 12, 2019 shares	Mar. 27, 2019 € / shares shares
Statement of Financial Position [Abstract]
Preferred stock, par value (in USD per share) | $ / shares	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in USD per share) | (per share)	$ 0.0001	$ 0.0001		€ 1.00
Common stock, shares authorized (in shares)	130,000,000	130,000,000
Common stock, shares issued (in shares)	20,718,340	10,744,806	120,070	156,920
Common stock, shares outstanding (in shares)	20,718,340	10,744,806