Warrants - Activity (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Warrants.
Balance (in shares)	127,540	57
Issued (in shares)	16,934,170	136,916
Exercised (in shares)	(3,451,642)	(9,432)
Cancelled (in shares)	(139)	(1)
Balance (in shares)	13,609,929	127,540