Debt (Tables)

3 Months Ended

Mar. 31, 2013

Debt Disclosure [Abstract]

Schedule of Debt

	As of		As of
	March 31,		December 31,
	2013		2012
Current debt:
Equipment financing credit facility	$	6,441	$	6,968
Total current debt	$	6,441	$	6,968
Long term debt:
Equipment financing credit facility	$	9,881	$	11,232
5% Convertible Debentures	91,628		99,275
Total long term debt	$	101,509	$	110,507

Schedule of payments on outstanding debt

Schedule of payments on outstanding debt as of March 31, 2013:

	Nine Months
	2013		2014		2015		2016		2017		Maturity
Equipment financing loans
Principal	$	5,085	$	4,732	$	3,798	$	2,208	$	499	2013 to 2017
Interest	1,003		604		322		120		9
5% Convertible Debentures
Principal	—		—		—		—		77,490		June 1, 2017
Interest	3,875		3,875		3,875		3,875		1,937
Total	$	9,963	$	9,211	$	7,995	$	6,203	$	79,935