Income Taxes - Components of Income Tax Expense (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Disclosure [Abstract]
Current, federal income tax expense									$ 364
Current, state income tax expense									11	8	7
Current, foreign income tax expense									133	21
Current Income Tax Expense (Benefit), Total									508	29	7
Deferred, federal income tax expense									389
Deferred, state income tax expense
Deferred, foreign income tax expense									127	19	9
Deferred Income Tax Expense (Benefit), Total									120	(9)	9
Federal Income Tax Expense (Benefit), Total									753
State Income Tax Expense (Benefit), Total									11	8	7
Foreign Income Tax Expense (Benefit), Total									260	40	9
Total Income Tax Expense	$ (378)	$ 516	$ 517	$ 369	$ (150)	$ 60	$ 91	$ 47	$ 1,024	$ 48	$ 16