Income Taxes (Reconciliation of Income Tax) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
State and local income taxes, net of federal benefit	$ 1,901	$ (3,282)	$ (2,834)
State and local income taxes, net of federal benefit	65	(16)	(85)
State rate change and other adjustments	0	531	160
Effective Income Tax Rate Reconciliation, Change in State Deferred Tax Assets, Amount	(590)	0	0
Increase (decrease) in valuation allowance	(1,672)	597	1,490
Foreign tax differential	24	915	816
Research and development credits	(365)	127	(49)
Share based compensation	491	518	402
Uncertain tax positions	(43)	767	(46)
Adjustments to federal deferred taxes	110	525	0
Other	130	67	275
Income tax provision	$ 51	$ 749	$ 129