BUSINESS - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions			3 Months Ended					6 Months Ended	9 Months Ended		12 Months Ended	36 Months Ended
	Oct. 31, 2019	Oct. 09, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2018	Apr. 30, 2021	Mar. 31, 2019	Jun. 30, 2019	Jun. 30, 2019
Debt Instrument [Line Items]
Cash			$ 25,540	$ 27,464	$ 32,788	$ 63,193	$ 68,262	$ 63,193		$ 32,788	$ 27,464	$ 27,464
Working capital deficit			(7,400)
Current maturities			10,000
Sales tax liability and interest			18,000
Net loss			$ 11,508	$ 9,850	$ 4,306	$ 10,438	$ 5,288	$ 15,726		$ 20,032	$ 29,882	$ 48,600
Private Placement | Subsequent Event
Debt Instrument [Line Items]
Sale of stock (in shares)		3.8
Sale of stock (in dollars per share)		$ 5.25
Offering proceeds, gross		$ 19,950
Cash placement fee		1,200
Commitment Letter | Subsequent Event | Term Loan
Debt Instrument [Line Items]
First draw	$ 15,000
Interest rate	9.75%
Forecast | Commitment Letter | Subsequent Event | Term Loan
Debt Instrument [Line Items]
Maximum borrowing capacity		30,000
Commitment fee		1,200
Cash placement fee		$ 750
Second draw									$ 15,000