Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Trade accounts receivable, allowance for doubtful accounts	$ 2,233	$ 1,179
Receivable from customers, allowance	$ 305	$ 270
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Preferred stock, shares authorized	20,000,000	20,000,000
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares, issued	78,295,000	77,448,000
Common stock, shares, outstanding	78,295,000	77,448,000
Common stock, shares authorized	600,000,000	600,000,000