Other Income, Net (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Components of other income, net
Other Nonoperating Income	$ 103	$ 422
Litigation settlement, net [Member]
Components of other income, net
Other Nonoperating Income		213
Realized gain on ARS [Member]
Components of other income, net
Other Nonoperating Income		104
Difference on earn-out paid related to MPC acquisition [Member]
Components of other income, net
Other Nonoperating Income	135
Interest income, net of interest expense [Member]
Components of other income, net
Other Nonoperating Income	35	45
Other [Member]
Components of other income, net
Other Nonoperating Income	$ (67)	$ 60