Severance and Other Charges (Details) - Severance and Other Charges Costs (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Jun. 30, 2014	Jun. 30, 2013
Restructuring Cost and Reserve [Line Items]
Total severance and other charges	$ 23	$ 51	$ 377	$ 62
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Total severance and other charges	23	51	69	62
Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Total severance and other charges			43
Legal Settlement [Member]
Restructuring Cost and Reserve [Line Items]
Total severance and other charges			$ 265