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Note 16 - Income Tax - Deferred Income Tax Components (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Loss carry-forwards and other credits $ 56,822 $ 70,952
Expenses not currently deductible 22,525 22,018
Stock-based compensation 474 210
Investments 17,303 15,470
Provision for doubtful accounts 4,990 3,601
Financing fees 376 267
Net unrealized foreign exchange (399)  
Net unrealized foreign exchange   3,097
Depreciation and amortization (21,713) (18,932)
Less: valuation allowance (12,707) (15,603)
Net deferred income tax asset $ 67,671 $ 81,080