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Note 20 - Summary of Deferred Income Tax Assets and Liabilities (Details) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Compensation and benefit accruals $ 1,987,000 $ 1,665,000
Inventory valuation 2,840,000 3,124,000
Federal and state net operating loss carryforwards 51,460,000 46,835,000
Deferred revenue 533,000 2,573,000
Accounts receivable allowance 42,000 113,000
Defined benefit pension plan 1,766,000 2,304,000
Foreign deferred revenue and other provisions 4,033,000 2,556,000
AMT credits 185,000 185,000
Other 1,526,000 974,000
64,372,000 60,329,000
Domestic valuation allowance (58,682,000) (51,914,000)
Foreign valuation allowance (4,033,000) 0
Total deferred tax assets 1,657,000 8,415,000
Foreign subsidiaries – unrepatriated earnings (379,000) (3,773,000)
Depreciation (1,278,000) (2,086,000)
Total deferred tax liabilities 1,657,000 5,859,000
Net deferred tax asset $ 0 $ 2,556,000