Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Accounts receivable, net of allowance for doubtful accounts	$ 1,584	$ 1,317
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	42,955,000	39,300,000
Common stock, shares outstanding	42,955,000	39,300,000