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401(k) Plan (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Defined Contribution Plan, Cost Recognized $ 74,000 $ 48,000
Defined Contribution Plan, Employer Matching Contribution, Percent of Match 100.00%