Debt (Tables)

9 Months Ended

Sep. 30, 2012

Debt Disclosure [Abstract]

Schedule of Debt

	As of		As of
	September 30,		December 31,
	2012		2011
Current debt:
Equipment financing credit facility	$	7,448	$	7,036
Capital lease	—		224
4% Convertible debentures	43,822		121,199
Total current debt	$	51,270	$	128,459
Long term debt:
Equipment financing credit facility	$	12,723	$	10,759
5% Convertible debentures	103,919		—
Total long term debt	$	116,642	$	10,759

Schedule of payments on outstanding debt

Schedule of payments on outstanding debt as of September 30, 2012:

	Three Months
Debt	2012		2013		2014		2015		2016		2017		Maturity
Equipment financing loans
principal	$	2,160	$	6,774	$	4,732	$	3,798	$	2,208	$	499	2012 to 2017
interest	330		1,003		604		322		120		9
4% Convertible debentures
principal	44,360		—		—		—		—		—		November 30, 2012
interest	890		—		—		—		—		—
5% Convertible debentures
principal	—		—		—		—		—		77,490		June 1, 2017
interest	1,937		3,875		3,875		3,875		3,875		1,937
Total	$	49,677	$	11,652	$	9,211	$	7,995	$	6,203	$	79,935