STOCKHOLDERS' EQUITY (Common Stock) (Details)							1 Months Ended	3 Months Ended
	Jan. 06, 2016 USD ($) $ / shares shares	Jul. 07, 2015 USD ($) $ / shares shares	Feb. 27, 2015 USD ($) $ / shares $ / unit shares	Oct. 22, 2014 USD ($) $ / shares shares	Jan. 24, 2013 USD ($) $ / shares shares	Feb. 02, 2012 USD ($) $ / shares shares	Dec. 31, 2011 USD ($)	Mar. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 $ / shares shares	Jan. 20, 2015 USD ($)	Jan. 15, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares	Oct. 21, 2014 $ / shares shares	Mar. 05, 2014 $ / shares shares	Dec. 31, 2012 $ / shares shares
Class of Stock [Line Items]
Common stock, shares authorized (in shares)								150,000,000	150,000,000
Common stock, shares issued (in shares)								20,695,870	13,915,691
Private placement, net (in shares)	6,780,179	1,500,000
Share price (in dollars per share) | $ / shares		$ 1.42						$ 0.58
Private placement, net | $								$ 543,000
Proceeds from issuance of common stock and warrants | $		$ 3,000,000
Preferred stock, shares issued (in shares)								2,365,243	4,029,502
Preferred stock, par value (in dollars per share) | $ / shares								$ 0.01	$ 0.01
Craig-Hallum Capital Group LLC
Class of Stock [Line Items]
Warrants term	5 years	5 years
Common stock warrant, exercise price (in dollars per share) | $ / shares	$ 1.21	$ 1.66
Payments of stock issuance costs | $	$ 140,000	$ 212,783
Payments of stock issuance costs, percentage of gross offering proceeds	7.00%	7.00%
Payments of stock issuance costs, warrant right to purchase common stock shares	107,527	107,033
Stock issuance costs, reimbursable expenses (not to exceed) | $	$ 50,000	$ 50,000
Proceeds from issuance of warrants | $	50
Convertible notes payable
Class of Stock [Line Items]
Face amount | $												$ 750,000
Third Security LLC and affiliates
Class of Stock [Line Items]
Common stock warrant, common stock called (in shares)					1,097,600									1,212,665
Common stock warrant, exercise price (in dollars per share) | $ / shares					$ 12.96									$ 11.73
Series A Warrants
Class of Stock [Line Items]
Warrants term		5 years 6 months
Warrants, period exercisable		6 months
Warrant exchange amount | $	$ 941,197
Warrant exercise period not subject to cash payment	90 days
Warrant exchange price threshold | $ / shares	$ 0.50
Series A Warrants | Maximum
Class of Stock [Line Items]
Common stock warrant, common stock called (in shares)	1,161,972
Series A Warrant, Cashless Exchange | Maximum
Class of Stock [Line Items]
Common stock warrant, common stock called (in shares)	1,882,395
Series A-1 Warrant
Class of Stock [Line Items]
Common stock warrant, common stock called (in shares)	1,773,929
Common stock warrant, exercise price (in dollars per share) | $ / shares	$ 1.21
Warrants, period exercisable	5 years
Warrant exchange amount | $	$ 1,436,882
Warrant exercise period not subject to cash payment	90 days
Warrant exchange price threshold | $ / shares	$ 0.50
Series A-1 Warrant | Maximum
Class of Stock [Line Items]
Common stock warrant, common stock called (in shares)	2,873,765
Series B Warrants
Class of Stock [Line Items]
Warrants term		5 years 6 months
Common stock warrant, exercise price (in dollars per share) | $ / shares		$ 0.01
Share price (in dollars per share) | $ / shares		$ 1.42
Series B Warrants | Maximum
Class of Stock [Line Items]
Common stock warrant, common stock called (in shares)		700,000.0
Warrants
Class of Stock [Line Items]
Common stock warrant, exercise price (in dollars per share) | $ / shares		$ 1.66
Warrants | Maximum
Class of Stock [Line Items]
Common stock warrant, common stock called (in shares)		1,200,000.0
Private Placement
Class of Stock [Line Items]
Proceeds from issuance of common stock and convertible notes | $						$ 22,000,000	$ 3,000,000
Common stock, shares issued (in shares)						1,583,333
Common stock, sale price per share (in dollars per share) | $ / shares						$ 12
Warrants term						5 years
Common stock warrant, common stock called (in shares)	3,239,827	2,188,177	1,881,396	1,309,785	1,097,600	823,333					1,483,161	1,387,685	1,212,665		948,333
Common stock warrant, exercise price (in dollars per share) | $ / shares	$ 4.39	$ 6.50	$ 7.56	$ 10.86	$ 12.96	$ 15.00					$ 9.59	$ 10.25	$ 11.73		$ 15.00
Payments of stock issuance costs | $						$ 1,330,000
Payments of stock issuance costs, percentage of gross offering proceeds						7.00%
Payments of stock issuance costs, warrant right to purchase common stock shares						31,666
Payments of stock issuance costs, warrant right to purchase common stock shares, percentage of shares in offering						2.00%
Stock issuance costs, reimbursable expenses (not to exceed) | $						$ 125,000
Payments of stock issuance costs, reduction to equity | $						$ 1,500,000
Private Placement | Third Security LLC and affiliates
Class of Stock [Line Items]
Convertible notes, common stock callable (in shares)						250,000
Convertible notes, warrants callable (in shares)						125,000
Offering
Class of Stock [Line Items]
Common stock warrant, common stock called (in shares)					691,655
Private placement, net (in shares)					1,383,333
Share price (in dollars per share) | $ / shares					$ 6.00
Private placement, net | $					$ 8,300,000
Class of warrant or right, number of securities called by warrants or rights, price per share (in dollars per share) | $ / shares					$ 9.00
Offering | Affiliates of Third Security, LLC; January 2018
Class of Stock [Line Items]
Common stock warrant, common stock called (in shares)					250,000
Private placement, net (in shares)					500,000
2014 Private Placement
Class of Stock [Line Items]
Common stock warrant, common stock called (in shares)				365,388
Common stock warrant, exercise price (in dollars per share) | $ / shares				$ 4.00
Private placement, net (in shares)				730,776
Share price (in dollars per share) | $ / shares				$ 3.25
Private placement, net | $				$ 2,400,000
2014 Private Placement | Advisor
Class of Stock [Line Items]
Common stock warrant, common stock called (in shares)				9,230
Additional Note Private Placement | Convertible notes payable
Class of Stock [Line Items]
Face amount | $										$ 925,000
Additional Note Private Placement | Convertible notes payable | Craig-Hallum Capital Group LLC
Class of Stock [Line Items]
Face amount | $											$ 46,250
Face amount as percentage of proceeds from debt issuance											5.00%
2015 Offering | Craig-Hallum Capital Group LLC
Class of Stock [Line Items]
Common stock warrant, common stock called (in shares)			714,780
Common stock warrant, exercise price (in dollars per share) | $ / shares			$ 2.24
Private placement, net (in shares)			3,573,899
Class of warrant or right, number of securities called by each warrant or right (in shares)			0.20
Class of warrant or right, purchase price per share, public (in dollars per share) | $ / unit			1.95
Class of warrant or right, purchase price per share, underwriter (in dollars per share) | $ / unit			1.8135
Proceeds from issuance of common stock and warrants, net | $			$ 6,200,000
Class of warrant or right, expiration period			5 years
Series A-1 Convertible Preferred Stock and Warrants
Class of Stock [Line Items]
Proceeds from issuance of convertible preferred stock | $	$ 2,200,000
Price per share of shares issued (in dollars per share) | $ / shares	$ 0.93
Series A-1 Convertible Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)	2,365,243
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.01
Voting rights, number of shares per one vote	1.075269
Series A Preferred Stock
Class of Stock [Line Items]
Dividend conversion rate per share | $ / shares	$ 1.00
Preferred stock, par value (in dollars per share) | $ / shares	0.01
Pro Forma | Series A Warrants
Class of Stock [Line Items]
Share price (in dollars per share) | $ / shares	$ 0.25
Payments for Repurchase of Warrants | $	$ 470,599
Warrant exchange amount | $	$ 941,197
Pro Forma | Series A Warrant, Cashless Exchange | Maximum
Class of Stock [Line Items]
Common stock warrant, common stock called (in shares)	1,882,395
Pro Forma | Series A-1 Warrant
Class of Stock [Line Items]
Share price (in dollars per share) | $ / shares	$ 0.25
Payments for Repurchase of Warrants | $	$ 718,441
Warrant exchange amount | $	$ 1,436,882
Pro Forma | Series A-1 Warrant | Maximum
Class of Stock [Line Items]
Common stock warrant, common stock called (in shares)	2,873,765