Accounts Receivable, Net and Revenue Concentrations - Allowance for Doubtful Accounts (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Schedule of Allowance for Doubtful Accounts
Balance at beginning of period	$ 478	$ 322
Additions to costs and expenses	69	48
(Write-offs)/FX effects	3	(45)
Balance at end of period	$ 550	$ 325