Supplementary Balance Sheet Information - Short-term Investments (Details)	12 Months Ended
Dec. 31, 2016 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Short-term Investments, Amortized Cost	$ 23,987,087
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	374
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	(9,439)
Estimate of Fair Value Measurement
Schedule of Available-for-sale Securities [Line Items]
Short-term Investments	$ 23,978,022
Corporate Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Maturity in Years	1 year
Available-for-sale Securities, Amortized Cost Basis	$ 14,165,915
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	44
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(5,273)
Corporate Debt Securities \| Estimate of Fair Value Measurement
Schedule of Available-for-sale Securities [Line Items]
Short-term Investments	$ 14,160,686
Commercial Paper
Schedule of Available-for-sale Securities [Line Items]
Maturity in Years	1 year
Available-for-sale Securities, Amortized Cost Basis	$ 1,195,444
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	0
Commercial Paper \| Estimate of Fair Value Measurement
Schedule of Available-for-sale Securities [Line Items]
Short-term Investments	$ 1,195,444
US Treasury Securities
Schedule of Available-for-sale Securities [Line Items]
Maturity in Years	1 year
Available-for-sale Securities, Amortized Cost Basis	$ 8,625,728
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	330
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(4,166)
US Treasury Securities \| Estimate of Fair Value Measurement
Schedule of Available-for-sale Securities [Line Items]
Short-term Investments	$ 8,621,892

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