Long-Term Debt - Summary of long term debt (Parentheticals) (Details)	12 Months Ended
	Dec. 31, 2016 USD ($)
Term loan payable to a financial institution; Interest rate option of bank prime or Libor plus 1.4% (2.02% as of December 31, 2016); monthly principal payments of $21,833 through 2021 with a balloon payment of $786,000 due December 1, 2021
Debt Instrument [Line Items]
Description of rate basis	Libor
Percentage of floating interest rate payable	1.40%
Frequency of principal payments	monthly
Monthly principal payments	$ 21,833
Balloon payment	$ 786,000
Percentage of fixed interest rate payable	2.02%
Term loan payable to a financial institution; Interest rate option of bank prime or Libor plus 1.4% (2.02% as of December 31, 2016); monthly principal payments of $23,810 through 2021
Debt Instrument [Line Items]
Description of rate basis	Libor
Percentage of floating interest rate payable	1.40%
Frequency of principal payments	monthly
Monthly principal payments	$ 23,810
Percentage of fixed interest rate payable	2.02%