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Income Tax Provision (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Dec. 22, 2017	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Income Tax Provision (Textual)
Net operating loss carryforwards				$ 2,600	$ 136,000
Percentage of statutory federal rate		21.00%	31.50%
Percentage of deferred tax benefits		21.00%
Net operating loss carryforwards		Dec. 31, 2024
Federal net operating loss carryforwards		$ 70,500	$ 54,300
State net operating loss carryforwards		70,500	54,300
Estimated limitation revalued the losses and credits		0	22,000
Valuation allowance		$ (16,025)	$ (7,038)
Income tax, description		Of the $70.5 million of federal net operating loss carryforwards, $54.3 million was generated in tax years beginning before March 31, 2018 and is subject to the 20-year carryforward period ("pre-Tax Act losses"), the remaining $16.2 million ("post-Tax Act losses") can be carried forward indefinitely but is subject to the 80% taxable income limitation.
Maximum [Member]
Income Tax Provision (Textual)
Percentage of corporate income tax rate	35.00%
Minimum [Member]
Income Tax Provision (Textual)
Percentage of corporate income tax rate	21.00%

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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