Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details Textual)

v3.8.0.1
Income Taxes (Details Textual) - USD ($)
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Taxes [Line Items]      
Operating Loss Carryforwards, Expiration Period   2037  
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount   $ 6,800,000 $ 4,810,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent   34.00% 34.00%
Scenario, Plan [Member]      
Income Taxes [Line Items]      
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00%    
Domestic Tax Authority [Member]      
Income Taxes [Line Items]      
Operating Loss Carryforwards   $ 45,494,000  
State and Local Jurisdiction [Member]      
Income Taxes [Line Items]      
Operating Loss Carryforwards   33,258,000  
Foreign Tax Authority [Member]      
Income Taxes [Line Items]      
Operating Loss Carryforwards   $ 3,201,000  
Research Tax Credit Carryforward [Member]      
Income Taxes [Line Items]      
Operating Loss Carryforwards, Expiration Period   2037  
Research Tax Credit Carryforward [Member] | Domestic Tax Authority [Member]      
Income Taxes [Line Items]      
Tax Credit Carryforward, Amount   $ 1,601,000  
Research Tax Credit Carryforward [Member] | State and Local Jurisdiction [Member]      
Income Taxes [Line Items]      
Tax Credit Carryforward, Amount   478,000  
Research Tax Credit Carryforward [Member] | Foreign Tax Authority [Member]      
Income Taxes [Line Items]      
Tax Credit Carryforward, Amount   $ 25,000