STOCKHOLDERS' EQUITY (Details) - USD ($)							1 Months Ended	12 Months Ended
	Apr. 06, 2018	Mar. 27, 2018	Oct. 02, 2017	Sep. 28, 2017	Feb. 22, 2017	Apr. 25, 2016	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Nov. 26, 2018	Dec. 31, 2016	Sep. 30, 2016
Class of Stock [Line Items]
Common stock, shares authorized (in shares)							47,000,000	47,000,000	47,000,000
Class of warrant or right, outstanding							3,730,255	3,385,100	3,730,255		2,915,559
Net proceeds from the sale of common stock from private placement offerings								$ 0	$ 15,950,000
Legal Fees					$ 29,000
Sale of common stock, net of offering costs								$ 21,189,000	$ 15,950,000
Preferred stock, shares authorized (in shares)							3,000,000	3,000,000	3,000,000
Stock Repurchase Program [Abstract]
Authorized repurchase amount										$ 4,000,000.0
Repurchase and retirement of common stock								$ 152,000
Repurchase and retirement of common stock, average price per share (in dollars per share)								$ 1.88
Shares excluded from computation of earnings per share (in shares)								6,561,974	6,289,603
Placement agents
Class of Stock [Line Items]
Share price (in dollars per share)				$ 4.85
Capital Units | Institutional and Individual Investors
Class of Stock [Line Items]
Share price (in dollars per share)			$ 4.85	4.70	$ 4.61
Capital Units | Placement agents
Class of Stock [Line Items]
Share price (in dollars per share)				$ 4.85
Common stock warrants
Class of Stock [Line Items]
Class of warrant or right, outstanding			1		1
Stock Repurchase Program [Abstract]
Shares excluded from computation of earnings per share (in shares)								3,385,100	3,730,255
Common stock warrants | Institutional and Individual Investors
Class of Stock [Line Items]
Period start after closing				6 months	6 months
Period end after closing				36 months	30 months
Common Stock
Class of Stock [Line Items]
Sales of common stock, net of offering costs (in shares)		5,714,286	1		1
Share price (in dollars per share)		$ 3.50			$ 8.25
Net proceeds from the sale of common stock from private placement offerings		$ 20,000,000
Sale of common stock, net of offering costs		$ 18,400,000
Stock Repurchase Program [Abstract]
Repurchase and retirement of common stock (in shares)								(80,100)
Shares excluded from computation of earnings per share (in shares)								1,255,280	1,082,490
Restricted stock units
Stock Repurchase Program [Abstract]
Shares excluded from computation of earnings per share (in shares)								1,921,594	1,476,858
Private Placement, Offering Two | Placement agents
Class of Stock [Line Items]
Sold in private placement (in shares)				11,567
Private Placement, Offering Two | Capital Units | Institutional and Individual Investors
Class of Stock [Line Items]
Net proceeds from the sale of common stock from private placement offerings			$ 1,100,000	$ 8,200,000	$ 7,500,000
Proceeds from issuance of private placement, net of offering costs			$ 1,000,000	$ 7,500,000
Sold in private placement (in shares)			231,338
Private Placement, Offering Two | Common stock warrants | Placement agents
Class of Stock [Line Items]
Sold in private placement (in shares)			98,846
Over-Allotment Option | Common Stock
Class of Stock [Line Items]
Sales of common stock, net of offering costs (in shares)	857,142
Share price (in dollars per share)	$ 3.50
Net proceeds from the sale of common stock from private placement offerings	$ 3,000,000
Sale of common stock, net of offering costs	$ 2,800,000
Private Placement Warrants
Class of Stock [Line Items]
Share price (in dollars per share)												$ 2.90
Class of warrant or right, outstanding							891,063	818,063	891,063		1,995,124
Sale of common stock, net of offering costs							$ 2,400,000
Private Placement Warrants | Placement agents
Class of Stock [Line Items]
Sales of common stock, net of offering costs (in shares)						99,844	836,780
Share price (in dollars per share)						$ 2.86
Private Placement Warrants | Private Placement | Capital Units | Institutional and Individual Investors
Class of Stock [Line Items]
Sales of common stock, net of offering costs (in shares)			1,976,919	1,745,581	1,626,898