Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Details 3)

v2.4.1.9
Commitments and Contingencies (Details 3) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
item
Commitments and Contingencies  
Number of previous claims experienced 0env_LossContingencyNumberOfPreviousClaimsExperienced
Future minimum unconditional purchase obligations to be incurred in 2015 $ 3,688us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary