Income Taxes (Details) - USD ($)		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016
Components of income tax expense (benefit) [Abstract]
Federal - current		$ 0	$ 0
State - current		6,000	(142,000)
Total current		6,000	(142,000)
Federal - deferred		(6,037,000)	(1,752,000)
State - deferred		(5,402,000)	(105,000)
Change in valuation allowance		(8,653,000)	1,857,000
Total deferred		(20,092,000)	0
Income tax expense (benefit)		(20,086,000)	(142,000)
Components of pretax income (loss) and difference between income taxes computed computed at statutory federal rate and provision for income taxes [Abstract]
Income (loss) before income taxes		(68,143,000)	(3,361,000)
Tax expense (benefit) [Abstract]
Tax at statutory federal rate		(23,851,000)	(1,176,000)
State income taxes		(5,019,000)	(142,000)
Rate change		16,047,000	0
Permanent items		0	0
Other		1,390,000	(681,000)
Change in valuation allowance		(8,653,000)	1,857,000
Income tax expense (benefit)		$ (20,086,000)	$ (142,000)
Reconciliation of federal statutory rate to effective income tax rate [Abstract]
Tax at statutory federal rate		35.00%	35.00%
State income taxes		7.00%	4.20%
Rate change		(24.00%)	0.00%
Permanent difference, tax credits and other adjustments		(0.00%)	(0.00%)
Other		(2.00%)	20.30%
Change in valuation allowance		13.00%	(55.30%)
Effective income tax rate		29.00%	4.20%
Operating Loss Carryforwards [Line Items]
AMT Credits carryforwards		$ 21,600,000
Net Deferred Tax Asset Arising Primarily From NOL Carryforwards and AMT Credits [Abstract]
Deferred tax asset		47,800,000	$ 36,400,000
Valuation allowance		(27,708,000)	(36,400,000)
Net deferred tax asset recognized		20,092,000	$ 0
Alternative Minimum Tax (AMT) Credit Carryforward [Member]
Tax Credit Carryforward [Line Items]
AMT Credit carryforward amount(s) projected to be claimed as refundable for each tax year	[1],[2]	20,092,000
Alternative Minimum Tax (AMT) Credit Carryforward [Member] | Tax Year 2018 [Member]
Tax Credit Carryforward [Line Items]
Declining balance of the AMT Credit carryforward amount(s) available for each tax year	[1],[2]	$ 20,092,000
% of AMT Credit carryforward amount(s) available to be claimed as refundable for each tax year		50.00%
AMT Credit carryforward amount(s) projected to be claimed as refundable for each tax year	[1],[2]	$ 10,046,000
Alternative Minimum Tax (AMT) Credit Carryforward [Member] | Tax Year 2019 [Member]
Tax Credit Carryforward [Line Items]
Declining balance of the AMT Credit carryforward amount(s) available for each tax year	[1],[2]	$ 10,046,000
% of AMT Credit carryforward amount(s) available to be claimed as refundable for each tax year		50.00%
AMT Credit carryforward amount(s) projected to be claimed as refundable for each tax year	[1],[2]	$ 5,023,000
Alternative Minimum Tax (AMT) Credit Carryforward [Member] | Tax Year 2020 [Member]
Tax Credit Carryforward [Line Items]
Declining balance of the AMT Credit carryforward amount(s) available for each tax year	[1],[2]	$ 5,023,000
% of AMT Credit carryforward amount(s) available to be claimed as refundable for each tax year		50.00%
AMT Credit carryforward amount(s) projected to be claimed as refundable for each tax year	[1],[2]	$ 2,511,500
Alternative Minimum Tax (AMT) Credit Carryforward [Member] | Tax Year 2021 [Member]
Tax Credit Carryforward [Line Items]
Declining balance of the AMT Credit carryforward amount(s) available for each tax year	[1],[2]	$ 2,511,500
% of AMT Credit carryforward amount(s) available to be claimed as refundable for each tax year		100.00%
AMT Credit carryforward amount(s) projected to be claimed as refundable for each tax year	[1],[2]	$ 2,511,500
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, amount		$ 44,600,000
Federal [Member] | Tax Year 2006 [Member]
Operating Loss Carryforwards [Line Items]
Tax year originating		2006
Tax year expiring		2026
Operating loss carryforwards, amount		$ 500,000
Federal [Member] | Tax Year 2007 [Member]
Operating Loss Carryforwards [Line Items]
Tax year originating		2007
Tax year expiring		2027
Operating loss carryforwards, amount		$ 12,700,000
Federal [Member] | Tax Year 2008 [Member]
Operating Loss Carryforwards [Line Items]
Tax year originating		2008
Tax year expiring		2028
Operating loss carryforwards, amount		$ 4,600,000
Federal [Member] | Tax Year 2009 [Member]
Operating Loss Carryforwards [Line Items]
Tax year originating		2009
Tax year expiring		2029
Operating loss carryforwards, amount		$ 2,400,000
Federal [Member] | Tax Year 2010 [Member]
Operating Loss Carryforwards [Line Items]
Tax year originating		2010
Tax year expiring		2030
Operating loss carryforwards, amount		$ 1,900,000
Federal [Member] | Tax Year 2011 [Member]
Operating Loss Carryforwards [Line Items]
Tax year originating		2011
Tax year expiring		2031
Operating loss carryforwards, amount		$ 1,900,000
Federal [Member] | Tax Year 2013 [Member]
Operating Loss Carryforwards [Line Items]
Tax year originating		2013
Tax year expiring		2033
Operating loss carryforwards, amount		$ 3,700,000
Federal [Member] | Tax Year 2014 [Member]
Operating Loss Carryforwards [Line Items]
Tax year originating		2014
Tax year expiring		2034
Operating loss carryforwards, amount		$ 4,900,000
Federal [Member] | Tax Year 2015 [Member]
Operating Loss Carryforwards [Line Items]
Tax year originating		2015
Tax year expiring		2035
Operating loss carryforwards, amount		$ 4,200,000
Federal [Member] | Tax Year 2016 [Member]
Operating Loss Carryforwards [Line Items]
Tax year originating		2016
Tax year expiring		2036
Operating loss carryforwards, amount		$ 3,400,000
Federal [Member] | Tax Year 2017 [Member]
Operating Loss Carryforwards [Line Items]
Tax year originating		2017
Tax year expiring		2037
Operating loss carryforwards, amount		$ 4,400,000
State [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, amount		$ 16,800,000
State [Member] | Tax Year 2011 [Member]
Operating Loss Carryforwards [Line Items]
Tax year originating		2011
Tax year expiring		2031
Operating loss carryforwards, amount		$ 1,800,000
State [Member] | Tax Year 2013 [Member]
Operating Loss Carryforwards [Line Items]
Tax year originating		2013
Tax year expiring		2033
Operating loss carryforwards, amount		$ 2,700,000
State [Member] | Tax Year 2014 [Member]
Operating Loss Carryforwards [Line Items]
Tax year originating		2014
Tax year expiring		2034
Operating loss carryforwards, amount		$ 4,200,000
State [Member] | Tax Year 2015 [Member]
Operating Loss Carryforwards [Line Items]
Tax year originating		2015
Tax year expiring		2035
Operating loss carryforwards, amount		$ 4,100,000
State [Member] | Tax Year 2016 [Member]
Operating Loss Carryforwards [Line Items]
Tax year originating		2016
Tax year expiring		2036
Operating loss carryforwards, amount		$ 2,800,000
State [Member] | Tax Year 2017 [Member]
Operating Loss Carryforwards [Line Items]
Tax year originating		2017
Tax year expiring		2037
Operating loss carryforwards, amount		$ 1,200,000

[1] Assumes no regular federal income tax liability in tax years presented above which would reduce any AMT Credit carryforward amount(s) ultimately refunded.

[2] The declining balance of the AMT Credit carryforward amount(s) available for each tax year and the AMT Credit carryforward amount(s) projected to be claimed as refundable for each tax year are net of certain estimated adjustments from the previously disclosed AMT Credit carryforward amounts.