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)

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Income Taxes (Schedule of Components of Company's Deferred Tax Assets and Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Deferred tax assets    
Tax losses carry forwards $ 113,419 $ 111,196
Inventory related 2,538 2,603
Intangibles assets 16,628 23,434
Provision for employee related obligations 984 1,169
Stock-based compensation expense 6,936 5,565
Deferred revenue 1,592 2,547
Property, plant and equipment 1,063 1,171
Allowance for doubtful accounts 217 609
Foreign currency losses 12 364
Research and development credit carry forwards 16,239 13,520
Other items 3,148 2,033
Gross deferred tax assets 162,776 164,211
Valuation allowance (151,771) (152,659)
Total deferred tax assets 11,005 11,552
Deferred tax liabilities    
Intangibles assets (7,245) (9,140)
Property, plant and equipment (1,683) (2,736)
Total deferred tax liabilities (8,928) (11,876)
Net deferred tax asset $ 2,077  
Net deferred tax liabilities   $ (324)