CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 269	$ 225
Preferred stock, par or stated value per share (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	500,000	500,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par or stated value per share (in dollars per share)	$ 0.001	$ 0.001
Common stock shares authorized (in shares)	100,000,000	100,000,000
Common stock shares issued (in shares)	76,152,193	52,222,538
Common stock shares outstanding (in shares)	75,775,666	51,846,011
Treasury stock (in shares)	376,527	376,527