Consolidated Balance Sheets (Parenthetical) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Shares outstanding (in shares)	31,255,267	1,135,310
Common stock, shares issued (in shares)	31,255,267	1,135,310
Common stock, shares authorized (in shares)	100,000,000	29,879,220
Common stock, par value (in USD per share)	$ 0.001	$ 0.001
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Preferred shares authorized (in shares)	5,000,000	0
Preferred shares (in USD per share)	$ 0.001	$ 0.001
Liquidation preference	$ 0	$ 121,144,000
Temporary equity, shares outstanding (in shares)	0	21,233,190
Temporary equity, shares issued (in shares)	0	21,233,190
Temporary equity, shares authorized (in shares)	0	24,069,615
Temporary equity, par value (in USD per share)	$ 0.001	$ 0.001
Allowances for accounts receivables	$ 45,000	$ 22,000