Income Taxes (Details) - USD ($)	2 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	May 11, 2017
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$ 0	$ 0	$ 0	$ 0	$ 0
Interest and penalty payments		0	0	0	0
Current federal tax benefits		0	0	0	0
Current state tax benefits		0	0	0	0
Income Taxes [Line Items]
Income tax (benefit) expense		$ (86,000)	$ 12,000	$ (86,000)	$ 17,000
Ownership percentage, threshold for utilization of net operating losses carryforward	50.00%	50.00%		50.00%			50.00%
Ownership percentage, period for utilization of net operating losses carryforwards				3 years
Deferred tax assets, operating loss carryforwards, annual limitation	$ 200,000	$ 200,000		$ 200,000
PHS
Income Taxes [Line Items]
Deferred tax assets, operating loss carryforwards, annual limitation							$ 90,000
Federal
Income Taxes [Line Items]
Operating loss carryforwards, subject to expiration						$ 19,900,000
Federal | PHS
Income Taxes [Line Items]
Operating loss carryforwards							1,870,000
Federal | Operating Loss Carryforwards
Income Taxes [Line Items]
Deferred tax assets valuation allowance	173,100,000	173,100,000		173,100,000
State
Income Taxes [Line Items]
Operating loss carryforwards, subject to expiration						19,300,000
State | PHS
Income Taxes [Line Items]
Operating loss carryforwards							$ 1,860,000
State | Operating Loss Carryforwards
Income Taxes [Line Items]
Deferred tax assets valuation allowance	140,400,000	$ 140,400,000		$ 140,400,000
Immaterial Error Correction | PHS
Income Taxes [Line Items]
Income tax (benefit) expense	$ (100,000)					$ (100,000)