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Note 16 - Income Taxes - Summary of Current and Noncurrent Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Accrued employee benefits | $ 3,525 | $ 3,089
Inventories | 73 | 147
Trade receivable, net | 958 | 788
Net operating loss carryforwards | 3,231 | 5,391
Tax credit carryforwards | 2,699 | 5,173
Other | 389 | 509
Deferred tax assets, gross | 10,875 | 15,097
Valuation allowance | (6,228) | (6,126)
Deferred tax assets, net | 4,647 | 8,971
Contract assets, net | (1,366) | (1,703)
Property and equipment | (12,029) | (10,578)
Intangible assets | (2,737) | (226)
Prepaid expenses | (889) | (587)
Total deferred tax liabilities | (17,021) | (13,094)
Net deferred income tax liabilities | (12,374) | (4,123)
Deferred income taxes | (12,481) | (4,265)
Net deferred income tax liabilities | (12,374) | (4,123)
Other Assets [Member] |  |
Deferred income tax assets, included in Other assets | $ 107 | $ 142

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