Income Taxes (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Components of income tax expense (benefit) [Abstract]
Federal - current	$ 0	$ 0	$ 0	$ 0
State - current	3,000	35,000	6,000	70,000
Total current	3,000	35,000	6,000	70,000
Federal - deferred	0	0	0	0
State - deferred	0	0	0	0
Total deferred	0	0	0	0
Income tax expense (benefit)	$ 3,000	$ 35,000	$ 6,000	$ 70,000
Reconciliation of federal statutory rate to effective income tax rate [Abstract]
Tax at statutory federal rate	35.00%	35.00%	35.00%	35.00%
State income taxes	0.30%	4.50%	0.30%	3.70%
Permanent differences	0.00%	0.00%	0.00%	0.00%
Other	0.00%	0.00%	0.00%	0.00%
Change in valuation allowance	(35.00%)	(35.00%)	(35.00%)	(35.00%)
Effective income tax rate	0.30%	4.50%	0.30%	3.70%
Operating Loss Carryforwards [Line Items]
AMT Credits	$ 21,000,000		$ 21,000,000
Net deferred tax asset arising primarily from NOL carryforwards and AMT credits [Abstract]
Deferred tax asset	37,300,000		37,300,000		$ 36,400,000
Valuation allowance	(37,300,000)		(37,300,000)		(36,400,000)
Net deferred tax asset recognized	0		0		$ 0
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, amount	39,400,000		39,400,000
State [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, amount	15,600,000		$ 15,600,000
Originated Loss Carryforwards [Member] | 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		$ 500,000
Originated Loss Carryforwards [Member] | 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		$ 12,700,000
Originated Loss Carryforwards [Member] | 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		$ 4,600,000
Originated Loss Carryforwards [Member] | 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		$ 2,400,000
Originated Loss Carryforwards [Member] | 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		$ 1,900,000
Originated Loss Carryforwards [Member] | 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		$ 1,900,000
Originated Loss Carryforwards [Member] | 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		$ 3,700,000
Originated Loss Carryforwards [Member] | 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		$ 4,900,000
Originated Loss Carryforwards [Member] | 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		$ 4,200,000
Originated Loss Carryforwards [Member] | Federal [Member] | Tax year 2016 [Member]
Operating Loss Carryforwards [Line Items]
Tax year originating			2016
Tax year expiring			2036
Operating loss carryforwards, amount	2,600,000		$ 2,600,000
Originated Loss Carryforwards [Member] | 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		$ 1,800,000
Originated Loss Carryforwards [Member] | 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		$ 2,700,000
Originated Loss Carryforwards [Member] | 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		$ 4,200,000
Originated Loss Carryforwards [Member] | 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		$ 4,100,000
Originated Loss Carryforwards [Member] | 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		$ 2,800,000