Note 8 - Accrued Expenses and Other Long-term Liabilities - Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Aquisition-related liabilities	$ 2,708	$ 3,700
Income taxes	756	813
Other	136	130
Total	$ 3,600	$ 4,643

Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due beyond one year or the operating cycle, whichever is longer. Alternate captions include income taxes payable, noncurrent.

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Amount of liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

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