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Note 2 - Supplemental Balance-sheet Information - Accounts Payable and Accrued Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Accounts payable $ 1,413 $ 3,652
Accrued expenses 847 1,053
Compensation, benefits and related taxes 567 576
Other accrued expenses 14 38
Total accounts payable and accrued expenses $ 2,841 $ 5,319