Loans Payable (Details) - USD ($)	1 Months Ended	6 Months Ended
	Jan. 31, 2018	Jun. 30, 2018	Dec. 31, 2017	Mar. 31, 2017	May 31, 2016
Information regarding the loan payable [Abstract]
Loan payable		$ 0	$ 2,296,000
Information regarding accrued interest expense on the loan payable [Abstract]
Accrued interest expense			67,000
Date of Loan, January 2017 [Member]
Information regarding the loan payable [Abstract]
Date of loan		Jan. 17, 2017
Rate		5.25%
Due date		Dec. 31, 2019
Loan payable		$ 0	500,000
Date of Loan, April 2017 [Member]
Information regarding the loan payable [Abstract]
Date of loan		Apr. 17, 2017
Rate		5.25%
Due date		Dec. 31, 2019
Loan payable		$ 0	500,000
Date of Loan, June 2017 [Member]
Information regarding the loan payable [Abstract]
Date of loan		Jun. 17, 2017
Rate		5.25%
Due date		Dec. 31, 2019
Loan payable		$ 0	500,000
Date of Loan, September 2017 [Member]
Information regarding the loan payable [Abstract]
Date of loan		Sep. 17, 2017
Rate		5.25%
Due date		Dec. 31, 2019
Loan payable		$ 0	150,000
Date of Loan, October 2017 [Member]
Information regarding the loan payable [Abstract]
Date of loan		Oct. 17, 2017
Rate		5.25%
Due date		Dec. 31, 2019
Loan payable		$ 0	446,000
Date of Loan, December 2017 [Member]
Information regarding the loan payable [Abstract]
Date of loan		Dec. 17, 2017
Rate		5.25%
Due date		Dec. 31, 2019
Loan payable		$ 0	$ 200,000
R. A. Bianco [Member] | Line of Credit [Member]
Line of Credit [Abstract]
Maximum borrowing capacity				$ 10,000,000	$ 1,000,000
Information regarding accrued interest expense on the loan payable [Abstract]
Repayment of working capital loan plus accrued interest	$ 2,623,000