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Note 5 - Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Federal tax expense (benefit) on net income/loss at statutory rate $ 686 $ (855)
Change in valuation allowance (412) (3,419)
Basis difference related to investment in SAVSU (110)
Return to provision 52 (1,038)
Federal rate change true-up 5,421
Stock compensation (748)
Book loss in SAVSU 141
162(m) limitation on executive compensation deductibility 296
Other (15) 1
Benefit (expense) for income taxes, net