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Income Taxes (Narrative) (Details) | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2016 USD ($) | Dec. 31, 2015 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2009 USD ($)
Income Taxes [Abstract] |  |  |  |  |  |  |  |
Consecutive number of quarters |  |  |  | 7 |  |  |  |
Income tax expense | $ 249,000 | $ 3,200,000 |  | $ 603,000 |  |  |  |
Proceeds from sale of common stock |  |  |  |  |  |  | $ 22,500,000 |
Net operating loss carry forwards |  | 25,166,000 |  |  |  | $ 25,166,000 |  |
Alternative minimum tax credit carryforwards |  | 105,000 |  |  |  | 105,000 |  |
Carryforwards utilize limit before the stock offering closed |  |  |  |  |  | 163,000 |  |
Unutilized operating loss carryforwards that will expire |  | 20,520,000 |  |  |  | 20,520,000 |  |
Reduced deferred tax assets and valuation allowance |  | 6,977,000 |  |  |  | 6,977,000 |  |
Statutory income tax rate | 34.00% |  | 0.00% | 34.00% | 0.00% |  |  |
Additional bad debt deductions provided by Federal income tax laws |  |  |  |  |  | 2,250,000 |  |
Deferred tax liability not recorded |  | 765,000 |  |  |  | 765,000 |  |
Deferred tax asset | $ 2,700,000 | 3,300,000 |  | $ 2,700,000 |  | 3,300,000 |  | $ 0
Unrecognized Tax Benefits | $ 0 | $ 0 |  | $ 0 |  | $ 0 |  |
Effective tax rate | 33.00% |  | 0.00% | 32.70% | 0.00% |  |  |

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