WARRANTS - Stock Warrant Activity (Details) - Warrants to purchase Common Stock	12 Months Ended
	Dec. 31, 2019 $ / shares shares
Number
Beginning balance (in shares) | shares	49,349
Expiries (in shares) | shares	(2,827)
Ending balance (in shares) | shares	46,522
Weighted Average Exercise Price
Beginning balance (in usd per share) | $ / shares	$ 27.65
Expiries (in usd per share) | $ / shares	187.50
Ending balance (in usd per share) | $ / shares	$ 17.93