Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2012

Supplemental Cash Flow Information [Abstract]

Summary additional cash flow information

	For the nine months ended
	September 30, 2012		September 30, 2011
Supplemental disclosures of cash flow information:
Cash paid for interest	$	1,161	$	435
Cash paid for dividends		157		559
Non-cash investing and financing activities:
Accrued preferred stock dividend		391		432
Accrued warrant liability		11,078		4,994
Accrued derivative liability		815		308
Subscription receivable		550		2,039
Conversion of preferred stock into common stock		0		1,203
Conversion of preferred stock derivative balance into common stock		79		7,237
Cashless exercise of warrants		0		4,842
Common stock issued in connection with conversion of debt		229		0