STOCKHOLDERS’ EQUITY AND EARNINGS PER SHARE (Details) $ / shares in Units, $ in Thousands						9 Months Ended	12 Months Ended
	Feb. 11, 2020 USD ($) shares	Feb. 10, 2020 shares	Feb. 06, 2020 $ / shares shares	Aug. 09, 2019 USD ($) shares	Jul. 31, 2019 USD ($) $ / shares shares	Sep. 30, 2019 USD ($) shares	Dec. 31, 2020 USD ($) vote $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Aug. 14, 2020 USD ($) $ / shares
Class of Stock [Line Items]
Common stock, shares authorized (in shares)							100,000,000	100,000,000
Number of votes | vote							1
Sales of common stock, net of offering costs (in shares)	201,000			396,000	3,960,560	2,766,798
Share price (in dollars per share) | $ / shares					$ 2.53
Sale of common stock, net of offering costs | $	$ 28,800			$ 3,000	$ 10,000		$ 37,447	$ 9,919
Gross proceeds from the sale of common stock | $	$ 26,400				$ 9,900		$ 40,173	$ 10,020
Shares, outstanding (in shares)				1,193,762
Gross proceeds from the second closing | $						$ 7,000
Common stock, par value (in dollars per share) | $ / shares							$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)							3,000,000	3,000,000
Preferred stock, shares issued (in shares)							0
Earnings Per Share [Abstract]
Shares excluded from computation of earnings per share (in shares)							4,179,760	6,030,618
Underwritten Public Offering
Class of Stock [Line Items]
Sales of common stock, net of offering costs (in shares)	19,166,667		16,666,667
Share price (in dollars per share) | $ / shares			$ 1.50
Common stock, par value (in dollars per share) | $ / shares			$ 0.001
Over-Allotment Option
Class of Stock [Line Items]
Sales of common stock, net of offering costs (in shares)	2,500,000
At-The-Market Equity Offering
Class of Stock [Line Items]
Sales of common stock, net of offering costs (in shares)							4,609,701
Share price (in dollars per share) | $ / shares							$ 2.48
Sale of common stock, net of offering costs | $							$ 11,400
Gross proceeds from the sale of common stock | $							11,000
Common stock, par value (in dollars per share) | $ / shares									$ 0.001
Sale of stock, authorized amount | $									$ 25,000
Remaining authorized amount to be sold | $							$ 13,600
Common stock options
Class of Stock [Line Items]
Sales of common stock, net of offering costs (in shares)							23,776,000	3,961,000
Sale of common stock, net of offering costs | $							$ 24	$ 4
Park City Capital
Class of Stock [Line Items]
Sales of common stock, net of offering costs (in shares)	134,000
Sale of common stock, net of offering costs | $				$ 1,000
Common stock warrants
Earnings Per Share [Abstract]
Shares excluded from computation of earnings per share (in shares)							0	2,134,362
Common stock options
Earnings Per Share [Abstract]
Shares excluded from computation of earnings per share (in shares)							1,140,975	1,340,252
Common stock options | Over-Allotment Option
Class of Stock [Line Items]
Sales of common stock, net of offering costs (in shares)		2,500,000
Option to purchase period		30 days
Non-vested restricted stock unit awards
Earnings Per Share [Abstract]
Shares excluded from computation of earnings per share (in shares)							3,038,785	2,556,004