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Note 17 - Income Taxes - Summary of Current and Noncurrent Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Jan. 01, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Contract assets, net | $ 425 |  |
Accrued employee benefits | 2,157 |  | 2,806
Inventories | 347 |  | 296
Trade receivable, net | 1,040 |  | 105
Net operating loss carryforwards | 12,867 |  | 9,850
Tax credit carryforwards | 5,181 |  | 5,478
Other assets |  |  | 1,201
Other | 226 |  | 81
Deferred tax assets, gross | 22,243 |  | 19,817
Valuation allowance | (9,433) |  | (10,413)
Deferred tax assets, net | 12,810 |  | 9,404
Contract assets, net |  |  | (110)
Property and equipment | (11,984) |  | (9,524)
Intangible assets | (310) |  | (433)
Prepaid expenses | (470) |  | (278)
Total deferred tax liabilities | (12,764) |  | (10,345)
Net deferred income tax assets (liabilities) | 46 |  |
Net deferred income tax assets (liabilities) |  |  | (941)
Deferred income tax assets, included in Other assets | 114 |  |
Deferred income taxes | (68) | $ (684) | (941)
Net deferred income tax assets (liabilities) | $ 46 |  |
Net deferred income tax assets (liabilities) |  |  | $ (941)

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