Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Allowances for accounts receivable
Allowances for accounts receivable	$ 11,084	$ 6,320
Common stock
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	85,778,057	84,188,202
Common stock, shares outstanding (in shares)	84,845,828	84,188,202
Treasury stock
Treasury stock, shares outstanding (in shares)	615,980	615,980