Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details Narrative)

v3.8.0.1
Income Taxes (Details Narrative) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Operating Loss Carryforwards [Line Items]      
Unrecognized tax benefit $ 200    
Federal income tax rate 21.00%    
Previous corporate tax rate 34.00% 34.00% 34.00%
Increased net valuation allowance $ 4,200    
Capitalized start-up costs 200    
Federal [Member]      
Operating Loss Carryforwards [Line Items]      
Net operating loss carry-forwards $ 24,600    
Net operating loss carryforwards expiration date Dec. 31, 2034    
Federal [Member] | Research And Development Credits Carryforward [Member]      
Operating Loss Carryforwards [Line Items]      
Net credits carryforward $ 300    
California [Member]      
Operating Loss Carryforwards [Line Items]      
Net operating loss carry-forwards $ 2,700    
Net operating loss carryforwards expiration date Dec. 31, 2034    
California [Member] | Research And Development Credits Carryforward [Member]      
Operating Loss Carryforwards [Line Items]      
Net credits carryforward $ 500