Significant Accounting Policies, Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Components of accumulated other comprehensive loss [Roll Forward]
Balance, beginning of period	[1]			$ 71,346
Current-period other comprehensive income (loss)		$ (21)	$ (53)	84	$ (14)
Balance, end of period		62,184		62,184
Accumulated Other Comprehensive Loss [Member]
Components of accumulated other comprehensive loss [Roll Forward]
Balance, beginning of period				(2,302)
Balance, end of period		(2,218)		(2,218)
Foreign Currency Translation Losses [Member]
Components of accumulated other comprehensive loss [Roll Forward]
Balance, beginning of period				(2,211)
Current-period other comprehensive income (loss)				(38)
Balance, end of period		(2,249)		(2,249)
Unrealized Gains/(Losses) on Investments [Member]
Components of accumulated other comprehensive loss [Roll Forward]
Balance, beginning of period				(91)
Current-period other comprehensive income (loss)				122
Balance, end of period		$ 31		$ 31

[1] Derived from the December 31, 2015 audited Consolidated Financial Statements included in our Annual Report on Form 10-K, as filed with the Securities and Exchange Commission ("SEC") on March 7, 2016.