SHAREHOLDERS' EQUITY (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended		12 Months Ended
	May 23, 2019	Mar. 29, 2019	Nov. 08, 2018	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2017
Number of units issued	1,935,484	14,193,548
Price per unit		$ 1.55
Net proceeds	$ 2,600	$ 20,300			$ 20,252
Issuance costs	$ 400	$ 1,700
Number of shares of common stock		1
Number of warrants received for each share of common stock share sold		0.5
Sale of common stock for cash, net of issuance costs					$ 20,252
Shares of common stock issued upon exercise of stock options				60,000	221,500
Proceeds from exercise of stock options				$ 62	$ 223
Weighted average exercise price of stock options (in dollars per share)				$ 1.06	$ 1.00
Shareholders' distribution declared per common share (note 13)				0	0
Annual return of capital declared (in dollars per share)						$ 0.01
Maximum
Proceeds from exercise of stock options					$ 200
Common Stock and Additional Paid-in Capital
Number of units issued					14,194,000
Net proceeds		$ 17,800			$ 20,252
Shares of common stock issued upon exercise of stock options				60,000	222,000
Warrants
Net proceeds		$ 2,500
Number of shares of common stock		1
Price per common share for each warrant		$ 2.00
Warrant expiration term		3 years
Subscription Receipts | Officers, directors and certain employees
Number of units issued		1,935,484
Price per unit		$ 1.55
ATM offering
Number of units issued					1,010,545
Aggregate offering price			$ 90,000
Sale of common stock for cash, net of issuance costs					$ 1,900