9. COMMON STOCK AND WARRANTS (Tables)

12 Months Ended

Dec. 31, 2014

Stockholders' Equity Note [Abstract]

Warrant activity

	Number of Shares			Price per Share		Weighted Average Exercise Price
Balance at December 31, 2011		426			$1.80 – $745.50	$	117.60
Warrants issued		4,633			$6.45 – $8.85	$	7.80
Warrants exercised		(20	)		$1.80 – $7.95	$	2.85
Balance at December 31, 2012		5,039			$1.80 – $745.50	$	17.10
Warrants issued		3,548			$6.32 – $7.59	$	6.98
Warrants exercised		(285	)		$1.80 – $8.85	$	7.27
Warrants expired		(27	)		$745.50	$	745.50
Balance at December 31, 2013		8,275			$5.47 – $735.00	$	10.04
Warrants exercised		(6,615	)		$6.09 – $8.85	$	7.17
Warrants expired		(804	)		$5.47	$	5.47
Balance at December 31, 2014		856			$6.09 – $735.00	$	36.55