Debt (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Debt discount amortization
Amortization of debt discount	$ 117	$ 93	$ 227	$ 237
Write-off of debt discount upon prepayments		123		123
Total amortization of discount	$ 117	$ 216	$ 227	$ 360