Income Taxes (Reconciliation of Income Tax) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
State and local income taxes, net of federal benefit	$ 2,816	$ 1,901	$ (3,282)
State and local income taxes, net of federal benefit	106	65	(16)
State rate change and other adjustments	(49)	0	531
Effective Income Tax Rate Reconciliation, Change in State Deferred Tax Assets, Amount	389	(590)	0
Increase (decrease) in valuation allowance	(3,332)	(1,672)	597
Foreign tax rate differential	(59)	24	915
Research and development credits	(267)	(365)	127
Share-based compensation	245	491	518
Uncertain tax positions	57	(43)	767
Adjustments to federal deferred taxes	208	110	525
Other	113	130	67
Income tax provision	$ 227	$ 51	$ 749