Net Loss Per Share - Reconciliation of Basic and Diluted Calculation (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	$ (865)	$ (13,018)
Weighted average shares:
Basic shares (in shares)	41,057	37,354
Effect of dilutive securities—options and warrants outstanding (in shares)	0	0
Diluted shares (in shares)	41,057	37,354
Net income (loss) per share - basic (in dollars per share)	$ (0.02)	$ (0.35)
Net income (loss) per share - diluted (in dollars per share)	$ (0.02)	$ (0.35)