Income Taxes - Summary of Significant Components of Deferred Tax Assets and Liabilities (Parenthetical) (Details) - USD ($)		Dec. 31, 2017	Dec. 31, 2016
Income Tax Contingency [Line Items]
Net operating loss carryforwards	[1]	$ 27,090,000	$ 34,287,000
Accounting Standards Update 2016-09 [Member]
Income Tax Contingency [Line Items]
Net operating loss carryforwards			$ 727,000

[1] During the prior year, we recorded an increase to the NOL and increase to the valuation allowance of $727,000 as a result of the adoption of ASU 2016-09, “Improvements to Employee Share-Based Payment Accounting.”