Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Components of income tax expense (benefit) [Abstract]
Federal - current	$ (30)	$ (30)
State - current	2	1
Total current	(28)	(29)
Federal - deferred	(1,171)	(869)
State - deferred	(1,524)	(816)
Change in valuation allowance	2,695	1,685
Total deferred	0	0
Income tax expense (benefit)	(28)	(29)
Components of pretax income (loss) and difference between income taxes computed at statutory federal rate and provision for income taxes [Abstract]
Income (loss) before income taxes	(5,632)	(4,955)
Tax expense (benefit) [Abstract]
Tax at statutory federal rate	(1,182)	(1,041)
State income taxes	(1,511)	(643)
Permanent items, tax credits and other adjustments	(30)	(30)
Deferred true-ups	0	0
Change in valuation allowance	2,695	1,685
Income tax expense (benefit)	$ (28)	$ (29)
Reconciliation of federal statutory rate to effective income tax rate [Abstract]
Tax at statutory federal rate	21.00%	21.00%
State income taxes	27.00%	13.00%
Permanent difference, tax credits and other adjustments	0.50%	0.60%
Deferred true-ups	0.00%	0.00%
Change in valuation allowance	(48.00%)	(34.00%)
Effective income tax rate	0.50%	0.60%
Alternative Minimum Tax (AMT) Credit Carryforward [Member]
Reconciliation of federal statutory rate to effective income tax rate [Abstract]
Income tax refund received	$ 30	$ 30