Debt (Tables)

12 Months Ended

Dec. 31, 2012

Debt

Debt at December 31, 2012 consisted of the following (in thousands):

	December 31, 2012
	Principal			Unamortized Discount			Total
Comerica—Growth Capital Loan A, due 2015	$	4,583		$	(49	)	$	4,534
Comerica—Revolving Line of Credit, due 2014		3,190			0			3,190
Total debt		7,773			(49	)		7,724
Less: debt—current		(4,857	)		29			(4,828	)
Debt—non-current	$	2,916		$	(20	)	$	2,896

Debt at December 31, 2011 consisted of the following (in thousands):

	December 31, 2011
	Principal			Unamortized Discount			Total
Comerica—Growth Capital Loan A, due 2015	$	5,000		$	(84	)	$	4,916
Comerica—Revolving Line of Credit, due 2014		2,300			0			2,300
Total debt		7,300			(84	)		7,216
Less: debt—current		(2,554	)		35			(2,519	)
Debt—non-current	$	4,746		$	(49	)	$	4,697

Expected Principal and Interest Payments on Debt

Principal and interest payments on debt at December 31, 2012 are expected to be as follows for each of the following three years (in thousands):

Year ended December 31,
2013	$	2,063
2014(1)		5,084
2015		1,334

(1) Included outstanding revolving line of credit balance based on the Company’s obligation to repay the outstanding revolving line of credit balance at the end of the revolving line of credit term.