Common Stock - Earnings per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Net loss	$ (7,595)	$ (2,921)
Weighted-average shares of common stock outstanding (in shares)	16,693	16,198
Net loss per share - basic and diluted (in dollars per share)	$ (0.45)	$ (0.18)