| 15. | INCOME TAXES |
| 2017 | 2016 | 2015 | ||||||||||
| (Loss) income before income tax | $ | (3,646 | ) | $ | 3,752 | $ | 23,085 | |||||
| 2017 | 2016 | 2015 | ||||||||||
| Current: | ||||||||||||
| Federal income tax | $ | (90 | ) | $ | (276 | ) | $ | 4,320 | ||||
| State income tax | 6 | 6 | 693 | |||||||||
| Total current (benefit) expense | (84 | ) | (270 | ) | 5,013 | |||||||
| Deferred: | ||||||||||||
| Federal, excluding operating loss carry forwards | 2,772 | 1,680 | 69,774 | |||||||||
| State, excluding operating loss carry forwards | (169 | ) | 228 | 19,725 | ||||||||
| Change in valuation allowance | 65 | (139 | ) | - | ||||||||
| Tax benefit of operating loss carry forwards: | ||||||||||||
| Federal | - | - | (66,285 | ) | ||||||||
| State | - | - | (18,027 | ) | ||||||||
| Total deferred expense | 2,668 | 1,769 | 5,187 | |||||||||
| Total income tax expense | $ | 2,584 | $ | 1,499 | $ | 10,200 | ||||||
| 2017 | 2016 | 2015 | ||||||||||
| Computed federal income taxes at the statutory rate | $ | (1,276 | ) | $ | 1,313 | $ | 8,080 | |||||
| Expense (benefit) in tax resulting from: | ||||||||||||
| State income taxes (net of Federal benefit) | (222 | ) | 229 | 1,408 | ||||||||
| Enacted rate change | 3,851 | - | - | |||||||||
| Other | 122 | (209 | ) | 263 | ||||||||
| Stock-based compensation | 44 | 27 | 449 | |||||||||
| Change in valuation allowance | 65 | 139 | - | |||||||||
| Total income tax expense | $ | 2,584 | $ | 1,499 | $ | 10,200 | ||||||
| Statement of comprehensive (loss) income: | |||||||||||||
| Income tax expense | $ | 2,584 | $ | 1,499 | $ | 10,200 | |||||||
| Other comprehensive income (loss), tax effect | $ | 655 | $ | 128 | $ | 1,434 | |||||||
| Statement of stockholders' equity (deficit): | |||||||||||||
| Additional paid-in capital: | |||||||||||||
| Excess tax expense (benefit) from share-based payments | $ | - | $ | 47 | $ | (733 | ) | ||||||
| Deferred tax assets: | ||||||||
| Net operating loss carry forwards | $ | 19,805 | $ | 26,429 | ||||
| Deferred GCI capacity revenue | 10,016 | 15,340 | ||||||
| Reserves and accruals | 7,910 | 12,499 | ||||||
| Intangibles and goodwill | 1,033 | 1,620 | ||||||
| Fair value on interest rate swaps | - | 25 | ||||||
| Pension liability | 927 | 1,804 | ||||||
| Allowance for doubtful accounts | 775 | 458 | ||||||
| Alternative minimum tax carry forward | - | 9,380 | ||||||
| Other | - | 257 | ||||||
| Total deferred tax assets | 40,466 | 67,812 | ||||||
| Valuation allowance | (204 | ) | (139 | ) | ||||
| Deferred tax assets after valuation allowance | 40,262 | 67,673 | ||||||
| Deferred tax liabilities: | ||||||||
| Debt issuance costs | (5 | ) | (933 | ) | ||||
| Property, plant and equipment | (37,287 | ) | (52,022 | ) | ||||
| Fair value on interest rate swaps | (146 | ) | - | |||||
| Other | (26 | ) | - | |||||
| Total deferred tax liabilities | (37,464 | ) | (52,955 | ) | ||||
| Net deferred tax asset | $ | 2,798 | $ | 14,718 |