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INCOME TAXES (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Components of income tax expense |  |
Effective corporate tax rate | 21.00% | 34.00%
Tax impact due to U.S.Tax reform | $ 223 |
Current taxes - Federal | (38) | $ (124)
Current taxes - State | 10 | 10
Current taxes - Foreign | 334 | 49
Deferred taxes - Federal |  | 176
Deferred taxes - State |  | 239
Deferred taxes - Foreign | 20 | 25
Income tax expense | 326 | 375
Reconciliation of federal income taxes and reported income taxes |  |
Statutory federal tax provision (benefit) | 107 | (704)
State income tax benefit | (36) | (117)
Effect of foreign operations | 52 | (88)
Uncertain tax positions | (19) |
Income tax credits |  | (112)
Valuation allowance | (199) | 1,011
Permanent differences | 15 | 8
Global Intangible Low-Taxed Income Effect | 296 |
Return to Provision - Credits and NOL | 176 |
Deferred adjustments | (62) |
Loss of Section 199 due to carryback claim |  | 46
Effects of tax reform |  | 280
Other | (4) | 51
Income tax expense | 326 | 375
Income (loss) from operations before income taxes |  |
Domestic | (1,090) | (2,831)
Foreign | 1,582 | 760
Income (Loss) before income taxes | 492 | (2,071)
Components of deferred tax assets (liabilities) |  |
Allowance for uncollectable accounts | 53 | 49
Inventories reserve | 267 | 198
Accrued vacation | 145 | 194
Amortization |  | 191
Stock-based compensation and equity appreciation rights | 54 | 23
Net operating loss carryforwards | 175 | 359
Tax credit carryforwards | 449 | 613
Other | 76 | 24
Deferred tax assets before valuation allowance | 1,219 | 1,651
Valuation allowance | (614) | (1,146)
Deferred tax assets | 605 | 505
Prepaid expenses | (40) | (165)
Section 481(a) adjustment | (249) |
Property and equipment | (316) | (319)
Deferred tax liabilities | (605) | (484)
Net deferred tax assets |  | 21
Valuation allowance on foreign assets | 0 |
Changes in total gross unrecognized tax benefit liabilities, excluding accrued interest |  |
Balance at the beginning of the year | 52 | 52
Additions based on tax positions related to the current year |  | 22
Statute of limitations | (19) | (22)
Balance at the end of the year | 33 | $ 52
Federal |  |
Operating loss carryforwards |  |
Net operating loss carryforwards | 23 |
Federal | General business |  |
Tax credit carryforwards |  |
Tax credit carryforwards | 284 |
Minnesota | State |  |
Operating loss carryforwards |  |
Net operating loss carryforwards | 1,168 |
Minnesota | State | R&D |  |
Tax credit carryforwards |  |
Tax credit carryforwards | 198 |
Iowa | State |  |
Operating loss carryforwards |  |
Net operating loss carryforwards | 400 |
Montana | State |  |
Operating loss carryforwards |  |
Net operating loss carryforwards | 4 |
Wisconsin | State |  |
Operating loss carryforwards |  |
Net operating loss carryforwards | $ 662 |

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