Annual report pursuant to Section 13 and 15(d)

Operating Leases (Details Textual)

v3.8.0.1
Operating Leases (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Operating Leased Assets [Line Items]    
Operating Leases, Rent Expense $ 0 $ 267,000
Operating Leases [Member]    
Operating Leased Assets [Line Items]    
Operating Leases, Rent Expense $ 570,000 542,000
Accrued And Other Long Term Liabilities [Member]    
Operating Leased Assets [Line Items]    
Incentive from Lessor   $ 267,000