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Note 17 - Income Taxes - Summary of Current and Noncurrent Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Contract assets, net |  | $ 425
Accrued employee benefits | 3,089 | 2,157
Inventories | 147 | 347
Trade receivable, net | 788 | 1,040
Net operating loss carryforwards | 5,391 | 12,867
Tax credit carryforwards | 5,173 | 5,181
Other | 509 | 226
Deferred tax assets, gross | 15,097 | 22,243
Valuation allowance | (6,126) | (9,433)
Deferred tax assets, net | 8,971 | 12,810
Contract assets, net | (1,703) |
Property and equipment | (10,578) | (11,984)
Intangible assets | (226) | (310)
Prepaid expenses | (587) | (470)
Total deferred tax liabilities | (13,094) | (12,764)
Net deferred income tax assets (liabilities) | (4,123) |
Net deferred income tax assets (liabilities) |  | 46
Deferred income taxes | (4,265) | (68)
Net deferred income tax assets (liabilities) | (4,123) |
Net deferred income tax assets (liabilities) |  | 46
Other Assets [Member] |  |
Deferred income tax assets, included in Other assets | $ 142 | $ 114

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