CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	May 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 1,816		$ 1,679	$ 1,119
Preferred stock, par value (in dollars per share)	$ 0.00002	$ 0.00002	$ 0.00002
Preferred stock, shares authorized (in shares)	0	10,000,000	54,148,643
Preferred stock, shares issued (in shares)	0		53,630,213
Preferred stock, shares outstanding (in shares)	0		53,630,213
Common stock, par value (in dollars per share)	$ 0.00002		$ 0.00002
Common stock, shares authorized (in shares)	1,094,129,050		97,500,000
Common stock, shares issued (in shares)	94,817,715		25,025,836
Common stock, shares outstanding (in shares)	94,817,715		25,025,836