Income Taxes (Details) - USD ($)	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2019	Jun. 30, 2018
Investments Owned Federal Income Tax Note [Line Items]
Loss before income taxes			$ (8,392,000)	$ (13,251,000)
Effective tax rate for continuing operations			10.00%
Current state tax expense			$ 0	0
Unrecognized tax benefits			$ 0	$ 0
Federal statutory effective tax rate	21.00%	35.00%	21.00%	28.00%
Tax cuts and jobs act provisional amounts adjusted in income tax expense			$ 509,000
Tax cuts and jobs act provisional amount related to deferred tax assets and liabilities	$ 8,500,000
Valuation allowance			18,900,000
Change in valuation allowance			$ (1,400,000)
Alternative minimum tax credit refunded, percentage			50.00%
Alternative minimum tax credit amount available			$ 858,000
Alternative minimum tax current year credit			429,000
Net operating loss carryforwards			77,700,000
Net losses carryforwards used for Federal income tax purposes			57,700,000
Federal income tax effected			$ 12,100,000
Percentage of limits on utilization of net operating losses of taxable income			80.00%
Accumulated state net operating loss carryforwards			$ 42,600,000
State income tax effected			1,400,000
Temporary credit loss carryovers			500,000
Temporary credit tax effected			300,000
Temporary credit offset			13,000
Alternative minimum tax carryforwards			400,000
Uncertain tax positions	0		0	$ 0
Interest expense for uncertain tax positions	$ 0		$ 0	$ 0
State and Local Jurisdiction
Investments Owned Federal Income Tax Note [Line Items]
Tax credit carryforward expiration year			2027
Earliest Tax Year
Investments Owned Federal Income Tax Note [Line Items]
Operating loss carryforward expiration year			2020
Earliest Tax Year | State and Local Jurisdiction
Investments Owned Federal Income Tax Note [Line Items]
Accumulated operating loss carryforward expiration year			2026
Latest Tax Year
Investments Owned Federal Income Tax Note [Line Items]
Operating loss carryforward expiration year			2037
Latest Tax Year | State and Local Jurisdiction
Investments Owned Federal Income Tax Note [Line Items]
Accumulated operating loss carryforward expiration year			2038
Indefinite Lives
Investments Owned Federal Income Tax Note [Line Items]
Net losses carryforwards used for Federal income tax purposes			$ 20,000,000
Federal income tax effected			$ 4,200,000