Related Parties - Itasca Capital Ltd. (Details) $ / shares in Units, $ / shares in Units, $ in Millions, $ in Millions	Nov. 19, 2019 USD ($) $ / shares shares	Oct. 31, 2019 CAD ($) $ / shares shares	Oct. 09, 2019 CAD ($) $ / shares shares	Sep. 30, 2019 USD ($) $ / shares shares	Sep. 05, 2018 shares	Mar. 31, 2020 shares	Dec. 31, 2019 shares
Related Party Transaction [Line Items]
Consideration received, cash | $	$ 0.6			$ 0.6
Consideration received (in shares)	594,750			594,750
Consideration received, warrants (in shares)	400,000			400,000
Warrant exercise price (in dollars per share) | $ / shares	$ 15			$ 15
Corporate Segment
Related Party Transaction [Line Items]
Equity method investment, ownership percentage						0.00%	0.00%
Restricted Stock
Related Party Transaction [Line Items]
Shares unvested (in shares)						500,000	729,500
2018 Restricted Stock Awards | Restricted Stock
Related Party Transaction [Line Items]
Shares unvested (in shares)						500,000
Former Chief Executive Officer | 2018 Restricted Stock Awards | Restricted Stock
Related Party Transaction [Line Items]
Shares granted (in shares)					350,000
Shares withheld for tax obligation (in shares)					102,550
Shares unvested (in shares)		247,450			247,450
ICL | ICL | Affiliated Entity
Related Party Transaction [Line Items]
Number of shares to be sold (in shares)		3,011,447	1,974,113
Share price (in dollars per share) | $ / shares		$ 0.35	$ 0.35
ICL | ICL | Affiliated Entity | Execution of Share Agreement With Related Party
Related Party Transaction [Line Items]
Amount of related party transaction | $		$ 1.1	$ 0.7
Number of shares (in shares)		247,450
ICL | ICL | Affiliated Entity | Execution of Share Agreement With Related Party, Portion Received in Cash
Related Party Transaction [Line Items]
Amount of related party transaction | $		$ 0.2