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Income Taxes (Narrative) (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2012 | Dec. 31, 2018
Proceeds from sale of common stock |  |  |  |  | $ 22,500,000 |
Valuation allowance against net deferred tax asset | $ 0 |  | $ 0 |  |  |
Net operating loss carry forwards | 22,742,000 |  | 22,742,000 |  |  |
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 |  |  |
Additional bad debt deductions (expense) |  |  | 2,250,000 |  |  |
Deferred tax liability not recorded | 473,000 |  | 473,000 |  |  |
Deferred tax asset | 1,600,000 |  | 1,600,000 |  |  | $ 1,600,000
Unrecognized Tax Benefits | $ 0 |  | $ 0 |  |  | $ 0
Effective tax rate | 20.40% | 19.80% | 20.20% | 19.50% |  |
Minimum [Member] |  |  |  |  |  |
Operating loss carryforwards, expiration |  |  | Dec. 31, 2024 |  |  |
Maximum [Member] |  |  |  |  |  |
Operating loss carryforwards, expiration |  |  | Dec. 31, 2033 |  |  |

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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b),(c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
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