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Note 14 - Income Tax - Deferred Income Tax Components (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Loss carry-forwards and other credits $ 19,056 $ 37,869
Expenses not currently deductible 31,508 34,265
Revenue not currently taxable (8,416) (15,227)
Stock-based compensation 157 525
Investments 10,628 11,290
Provision for doubtful accounts 4,871 4,221
Financing fees (83) 162
Net unrealized foreign exchange losses 126 (634)
Depreciation and amortization (42,257) (32,035)
Less: valuation allowance (8,945) (11,079)
Net deferred income tax asset $ 6,645 $ 29,357