CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
CONDENSED CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowance for credit losses and bad debt	$ 193	$ 137
Common stock, par value	$ 0.00001	$ 0.00001
Common stock, shares authorized	220,000	220,000
Common stock, shares issued	69,028	66,199
Common stock, shares outstanding	67,112	65,274
Treasury stock, shares	1,916	925