Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Condensed Consolidated Balance Sheets
Allowance for credit losses	$ 179	$ 0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized	45,000,000	45,000,000
Common stock, shares, issued	32,937,431	32,853,066
Common stock, shares, outstanding	32,937,431	32,853,066