STOCKHOLDERS' EQUITY (Common Stock) (Details)						1 Months Ended		3 Months Ended			12 Months Ended
	Jun. 14, 2016 USD ($) shares	May 31, 2016 shares	Jan. 08, 2016 USD ($) $ / shares shares	Jan. 06, 2016 $ / shares shares	Dec. 29, 2010 USD ($) $ / shares	May 31, 2016 shares	Jan. 31, 2016 USD ($) $ / shares shares	Mar. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($) $ / shares shares	Jun. 07, 2016 shares	Jul. 07, 2015 shares
Class of Stock [Line Items]
Common stock, shares authorized (in shares)								150,000,000	150,000,000		150,000,000
Initial valuation of warrant issued in conjunction with Private Placement | $			$ 1,800,000					$ 0		$ 1,827,000
Debt settled with issuance of preferred stock and warrants | $								$ 0		199,000	$ 200,000
Preferred stock, shares outstanding (in shares)								214,705	214,705		214,705
Payments of stock issuance costs | $										$ 219,000
Stock issued for services | $	$ 89,000
Common stock, shares issued (in shares)								26,863,062	26,446,927		26,446,927
Craig-Hallum Capital Group LLC
Class of Stock [Line Items]
Common stock warrant, exercise price (in dollars per share) | $ / shares							$ 4.39
Class of warrant or right, exercise term							5 years
Payments of stock issuance costs | $							$ 140,000
Payments of stock issuance costs, percentage of gross offering proceeds							7.00%
Share price (in dollars per share) | $ / shares							$ 50
Payments of stock Issuance costs, warrant right to purchase common stock (shares)							107,527
Sale of stock, price per share | $ / shares							$ 1.21
Reimbursable expenses | $							$ 50,000
Partners' capital account, units, sold in private placement (units)							3,239,827
Craig-Hallum Capital Group LLC | Previously Reported
Class of Stock [Line Items]
Partners' capital account, units, sold in private placement (units)							2,188,177
Vendor I
Class of Stock [Line Items]
Stock issued for services (shares)		78,000
Vendor II
Class of Stock [Line Items]
Stock issued for services (shares)	64,153
2016 Warrant
Class of Stock [Line Items]
Common stock warrant, exercise price (in dollars per share) | $ / shares								$ 1.21
Number of shares converted, shares											1,006,419
Class of warrant or right, exercise term								5 years
Stock warrant exchange amount | $								$ 1,436,882
Price per share of stock warrants exchanged (usd per unit) | $ / shares								$ 0.50
Series A-1 Warrant
Class of Stock [Line Items]
Exercise period not subject to cash payment				90 days
At the Market Offering Agreement | Craig-Hallum Capital Group LLC
Class of Stock [Line Items]
Common stock, shares authorized (in shares)												3,500,000
Common stock warrant, exercise price (in dollars per share) | $ / shares									$ 4.23		$ 4.23
Sale of stock, price per share | $ / shares									$ 0.42		$ 0.42
Partners' capital account, units, sold in private placement (units)											3,362,276
Placement fees, percentage of gross sales price												3.25%
Common stock, shares issued (in shares)									1,177,849		1,177,849
Proceeds from the issuance of stock | $									$ 500,000
At the Market Offering Agreement | Craig-Hallum Capital Group LLC | Previously Reported
Class of Stock [Line Items]
Partners' capital account, units, sold in private placement (units)											3,262,088
Series A-1 Convertible Preferred Stock and Warrants
Class of Stock [Line Items]
Conversion ratio				1
Series A Preferred Stock
Class of Stock [Line Items]
Common stock warrant, exercise price (in dollars per share) | $ / shares				$ 1.00	$ 2.32
Preferred stock, shares outstanding (in shares)				0
Payments of stock issuance costs | $					$ 200,000
Conversion ratio				0.3333
Common Stock | Craig-Hallum Capital Group LLC
Class of Stock [Line Items]
Share price (in dollars per share) | $ / shares							$ 1.00
Common Stock | 2016 Warrant
Class of Stock [Line Items]
Common stock warrant, common stock called (in shares)								2,873,765
Common stock warrant, exercise price (in dollars per share) | $ / shares								$ 0.25
Number of shares converted, shares											1,613,353
Cash payment for portion of stock warrants exercised | $								$ 718,441
Stock warrants settled with cash | $								$ 500,000			$ 500,000
Security Purchase Agreement
Class of Stock [Line Items]
Private placement, net | $			2,200,000
Net proceeds from the issuance of stock warrants | $			$ 2,000,000
Security Purchase Agreement | Series A Warrants
Class of Stock [Line Items]
Common stock warrant, common stock called (in shares)								1,161,972					1,161,972
Stock warrant exchange amount | $								$ 941,197
Exercise period not subject to cash payment								90 days
Price per share of stock warrants exchanged (usd per unit) | $ / shares								$ 0.50
Security Purchase Agreement | Series A Warrants | Maximum
Class of Stock [Line Items]
Common stock warrant, common stock called (in shares)								1,882,395
Security Purchase Agreement | Series A Preferred Stock
Class of Stock [Line Items]
Private placement, net (in shares)			2,365,243
Dividends | $			$ 400,000
Class of warrant or right, number of securities called by each warrant or right (per right)			1.075269
Number of shares converted, shares						2,150,538
Preferred stock, shares outstanding (in shares)								214,705
Security Purchase Agreement | Common Stock
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			$ 0.93
Class of warrant or right, number of securities called by each warrant or right (per right)			0.93
Number of shares converted, shares						2,150,538
Security Purchase Agreement | Common Stock | Series A Warrants
Class of Stock [Line Items]
Common stock warrant, common stock called (in shares)				1,882,395
Common stock warrant, exercise price (in dollars per share) | $ / shares								$ 0.25
Cash payment for portion of stock warrants exercised | $								$ 470,599