Capital Stock and Share-Based Compensation - Summary of Restricted Stock Units (Details) - Restricted stock units (RSUs) - Employee director compensation plan $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($) $ / shares shares
Number of Stock Units
Beginning balance (in shares) | shares	629,003
Granted (in shares) | shares	47,015
Issued (in shares) | shares	(47,377)
Ending balance (in shares) | shares	628,641
Weighted Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 2.09
Granted (in dollars per share) | $ / shares	6.70
Issued (in dollars per share) | $ / shares	1.65
Ending balance (in dollars per share) | $ / shares	$ 2.37
Intrinsic Value Outstanding
Aggregate Grant Date Fair Value of Unvested Shares, Beginning balance | $	$ 4,585
Granted | $	281
Issued | $	0
Aggregate Grant Date Fair Value of Unvested Shares, Ending balance | $	$ 3,759