EQUITY (Tables)

12 Months Ended

Dec. 31, 2015

Equity Tables

Summary of common stock activity

	Common Stock
Shares outstanding at December 31, 2012		76,639,849
Shares issued pursuant to warrants exercised for cash		6,132,779
Shares issued pursuant to cashless warrants exercised		4,458,493
Conversion of related-party notes payable into Common Stock		18,182
Shares issued as compensation in lieu of cash		264,000
Shares issued pursuant to option exercises		35,310
Shares outstanding at December 31, 2013		87,548,613
Shares issued pursuant to warrants exercised for cash		4,742,632
Shares issued pursuant to cashless warrants exercised		868,565
Conversion of related-party notes payable into Common Stock		154,607
Shares issued as compensation in lieu of cash		94,116
Shares issued pursuant to option exercises		98,617
Shares outstanding at December 31, 2014		93,507,150
Shares issued pursuant to payment of stock dividend on Series E Preferred		478,664
Shares issued pursuant to cashless warrants exercised		45,376
Shares issued pursuant to option exercises		39,705
Shares outstanding at December 31, 2015		94,070,895

Summary of warrant activity

	Warrants			Weighted-   Average  Exercise Price
Balance at December 31, 2012		18,788,485		$	0.56
Granted		1,232,632		$	1.01
Expired / Canceled		(688,749	)	$	1.49
Exercised		(12,733,952	)	$	0.52
Balance at December 31, 2013		6,598,416		$	0.63
Granted		302,778		$	2.02
Expired / Canceled		(55,000	)	$	1.10
Exercised		(5,868,416	)	$	0.58
Balance at December 31, 2014		977,778		$	1.22
Granted		—		$	0.00
Expired / Canceled		(419,444	)	$	1.86
Exercised		(108,334	)	$	1.01
Balance at December 31, 2015		450,000		$	0.67

Summary of warrants by exercise price

Exercise Price		Number Outstanding	Weighted—Average  Remaining Life (Years)	Weighted—Average  Exercise Price
$	0.50	250,000	1.0	$	0.50
$	0.80	150,000	3.0	$	0.80
$	1.10	50,000	1.1	$	1.10
		450,000	1.7	$	0.67