Income Taxes (Details Textual) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | 12 Months Ended | |
|---|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2018 |
Jun. 30, 2017 |
Dec. 31, 2017 |
|
| Income Taxes [Line Items] | ||||
| Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation | $ 0.5 | $ 0.5 | ||
| Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 34.00% | ||
| Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | $ 14.6 | |||
| Unrecognised Deferred Tax Asstes Stock Compensation | $ 1.3 | 1.3 | ||
| Discontinued Operation [Member] | ||||
| Income Taxes [Line Items] | ||||
| Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation | $ 0.5 | $ 0.5 | ||