CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
CONDENSED CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowance for credit losses and bad debt	$ 2,806		$ 2,198
Common stock, par value	$ 0.00001		$ 0.00001
Common stock, shares authorized	900,000,000		900,000,000
Common stock, shares issued	163,286,570	158,300,605	155,516,284	151,146,986	147,934,768	146,677,786
Common stock, shares outstanding	151,798,879		148,764,592
Treasury stock, shares	11,487,691	7,883,740	6,751,692	4,725,296	3,035,404	2,534,494