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Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Operating loss carryforwards
Federal net operating loss carryforwards	$ 2,100,000	$ 2,400,000
Federal research credit carryforwards	768,000	95,000
State net operating loss carryforwards	200,000	300,000
State research credit carryforwards	$ 24,000	0
Income tax:
Threshold percentage of shareholders ownership change	5.00%
Minimum increase in ownership percentage annual limitation may result in expiration of NOL and credits	50.00%
Period for testing percentage of ownership change	36 months
Uncertain tax positions	$ 0	0
Interest or penalties	$ 0	$ 0

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards.

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