Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Income Taxes (Schedule of Components of Company's Deferred Tax Assets and Liabilities) (Details)

v3.8.0.1
Income Taxes (Schedule of Components of Company's Deferred Tax Assets and Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Deferred tax assets    
Tax losses carry forwards $ 114,107 $ 139,914
Inventory related 2,584 12,124
Intangibles assets 23,143 38,379
Provision for employee related obligations 1,463 3,568
Stock-based compensation expense 4,887 6,040
Deferred revenue 2,036 3,211
Property, plant and equipment 924 1,140
Allowance for doubtful accounts 646 645
Foreign currency losses 421 587
Research and development credit carry forwards 11,288 9,998
Other items 1,383 1,560
Gross deferred tax assets 162,882 217,166
Valuation allowance (152,062) (201,376)
Total deferred tax assets 10,820 15,790
Deferred tax liabilities    
Intangibles assets (13,658) (17,053)
Property, plant and equipment (3,581) (2,662)
Total deferred tax liabilities (17,239) (19,715)
Net deferred tax liabilities $ (6,419) $ (3,925)