Fair Value Measurements (Schedule Of Fair Values Of Financial Instruments Measured On Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Total assets	$ 19,901	$ 7,797
Business Combination, Contingent Consideration, Liability	17,050	17,450
Derivative Liability	958	958
Financial Liabilities Fair Value Disclosure	18,008	18,408
Money Market Funds [Member]
Cash	19,836	7,737
Certificates of Deposit [Member]
Investments	65	60
Level 1 [Member]
Total assets	19,836	7,737
Business Combination, Contingent Consideration, Liability	0	0
Derivative Liability	0	0
Financial Liabilities Fair Value Disclosure	0	0
Level 1 [Member] | Money Market Funds [Member]
Cash	19,836	7,737
Level 1 [Member] | Certificates of Deposit [Member]
Investments	0	0
Level 2 [Member]
Total assets	65	60
Business Combination, Contingent Consideration, Liability	0	0
Derivative Liability	958	958
Financial Liabilities Fair Value Disclosure	958	958
Level 2 [Member] | Money Market Funds [Member]
Cash	0	0
Level 2 [Member] | Certificates of Deposit [Member]
Investments	65	60
Level 3 [Member]
Total assets	0	0
Business Combination, Contingent Consideration, Liability	17,050	17,450
Derivative Liability	0	0
Financial Liabilities Fair Value Disclosure	17,050	17,450
Level 3 [Member] | Money Market Funds [Member]
Cash	0	0
Level 3 [Member] | Certificates of Deposit [Member]
Investments	$ 0	$ 0