Consolidated Balance Sheets(Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 2,980	$ 2,754
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	200,000,000	200,000,000
Common stock, issued (in shares)	109,886,197	107,509,096
Common stock, outstanding (in shares)	109,886,197	107,509,096