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Note 16 - Income Taxes - Summary of Current and Noncurrent Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Costs and estimated earnings in excess of billings on uncompleted contracts, net $ 1,270
Accrued employee benefits 2,806 5,025
Inventories 296 563
Trade receivable, net 105 199
Net operating loss carryforwards 9,850 15,637
Tax credit carryforwards 5,478 5,069
Other assets 1,201 1,830
Other 81 1,018
Deferred tax assets, gross 19,817 30,611
Valuation allowance (10,413) (8,217)
Deferred tax assets, net 9,404 22,394
Costs and estimated earnings in excess of billings on uncompleted contracts, net (110)
Property and equipment (9,524) (22,380)
Intangible assets (433) (819)
Prepaid expenses (278) (477)
Total deferred tax liabilities (10,345) (23,676)
Net deferred income tax liabilities $ (941) $ (1,282)