REDEEMABLE SERIES A PREFERRED STOCK - Series A Preferred Stock Summary (Details) - USD ($) $ / shares in Units, $ in Thousands				1 Months Ended	3 Months Ended
	Jun. 20, 2019	Mar. 07, 2019	Jul. 19, 2018	Jul. 31, 2018	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Temporary Equity [Line Items]
Net proceeds from issuance of Series A Preferred Stock and Common Stock					$ 0	$ 5,785
Net carrying value					134,033		$ 131,316
Common stock issued					$ 7		7
Footnotes [Abstract]
Temporary equity, liquidation preference (usd per share)			$ 1,000		$ 10.00
Temporary Equity, Liquidation Preference	$ 3,500	$ 6,500	$ 140,000		$ 156,401		$ 155,231
Net proceeds from issuance of Series A Preferred Stock and Common Stock					0	5,785
Series A Preferred Stock
Footnotes [Abstract]
New stock issued during period (shares)			140,000	19,209
Private Placement
Temporary Equity [Line Items]
Temporary stock issued	2,997	5,313	$ 126,763
Issuance of common stock	3,373	6,035	146,894
Net proceeds from issuance of Series A Preferred Stock and Common Stock	3,325	5,785	133,000
Incremental and direct costs	(339)	(751)	(4,628)
Consideration received	2,986	5,034	128,372
Footnotes [Abstract]
Temporary stock issued	2,997	5,313	126,763
Net proceeds from issuance of Series A Preferred Stock and Common Stock	3,325	5,785	133,000
Incremental and direct costs, shares issued, cost	200	500
Incremental and direct transaction costs	$ 339	$ 751	$ 4,628
Private Placement | Series A Preferred Stock
Temporary Equity [Line Items]
Temporary stock issued (shares)	3,500	6,500	140,000
Temporary stock issued	$ 2,997	$ 5,313	$ 126,763
Net proceeds from issuance of Series A Preferred Stock and Common Stock	2,954	5,093	114,773
Incremental and direct costs	(301)	(661)	(3,994)
Net carrying value	$ 2,653	$ 4,432	110,779
Footnotes [Abstract]
Temporary equity, liquidation preference (usd per share)	$ 1,000	$ 1,000
Temporary stock issued	$ 2,997	$ 5,313	126,763
Net proceeds from issuance of Series A Preferred Stock and Common Stock	2,954	5,093	114,773
Incremental and direct transaction costs	$ 301	$ 661	$ 3,994
Common Stock
Temporary Equity [Line Items]
Issuance of common stock					$ 0	$ 0
Footnotes [Abstract]
New stock issued during period (shares)	72,414	134,483	2,900,000		0	110,000
Shares issued (usd per share)	$ 5.19	$ 5.37	$ 6.95
Common Stock | Private Placement
Temporary Equity [Line Items]
Issuance of common stock	$ 376	$ 722	$ 20,131		$ 0	$ 0
Net proceeds from issuance of Series A Preferred Stock and Common Stock	371	692	18,227
Incremental and direct costs	(38)	(90)	(634)
Common stock issued	$ 333	$ 602	17,593
Footnotes [Abstract]
New stock issued during period (shares)	72,414	134,483			0	134,000
Net proceeds from issuance of Series A Preferred Stock and Common Stock	$ 371	$ 692	18,227
Incremental and direct costs (shares)	35,000	85,000
Incremental and direct transaction costs	$ 38	$ 90	634
Due Diligence And Professional Fees | Private Placement
Temporary Equity [Line Items]
Incremental and direct costs	(200)	(300)	(1,900)			$ (300)
Footnotes [Abstract]
Incremental and direct transaction costs	$ 200	$ 300	1,900			$ 300
Financial Advisor And Professional Fees | Private Placement
Temporary Equity [Line Items]
Incremental and direct costs			(2,700)
Footnotes [Abstract]
Incremental and direct transaction costs			$ 2,700