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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Federal Tax Benefit at Statutory Rate	$ 3,334	$ 1,335
State Tax Benefit Net of Federal	(117)	137
IPO Costs	(76)	(227)
Stock Warrant Costs	(395)	0
Other Permanent Differences	(9)	(3)
Change in Deferred Tax Rate due to Tax Reform	(1,562)	0
Other	(11)	0
Increase in Valuation Allowance	(1,164)	(1,242)
Total Tax (Expense) / Benefit	$ 0	$ 0
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal Tax Benefit at Statutory Rate (percentage)	34.00%	34.00%
State Tax Benefit Net of Federal (percentage)	(1.20%)	3.48%
IPO Costs (percentage)	(0.77%)	(5.78%)
Stock Warrant Costs (percentage)	(4.03%)	(0.00%)
Other Permanent Differences (percentage)	(0.09%)	(0.08%)
Change in Deferred Tax Rate (percentage)	(15.93%)	(0.00%)
Other (percentage)	(0.11%)	(0.00%)
Increase in Valuation Allowance (percentage)	(11.87%)	(31.62%)
Total Tax (Expense) / Benefit (percentage)	(0.00%)	(0.00%)

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