Quarterly report pursuant to Section 13 or 15(d)

22. Shareholders' Equity (Details Narrative)

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22. Shareholders' Equity (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2018
Dec. 31, 2016
Dec. 30, 2017
Common Stock, issued shares (in shares) 6,875,000   6,875,000
Common Stock, outstanding shares (in shares) 6,875,000   6,875,000
Options outstanding 504,000   627,000
Expected dividend yield (as a percent) 0.00%    
Expected stock price volatility (as a percent) 85.44%    
Risk-free interest rate (as a percent) 2.16%    
Expected life of options (in years) 10 years    
Aggregate intrinsic value per share outstanding $ 0.69    
Warrants outstanding 24,000    
Warrant exercise price $ 3.55    
Warrant expiration date May 31, 2020    
2016 Plan [Member]      
Options authorized for issuance 2,000,000    
Options outstanding 20,000    
2011 Plan [Member]      
Options outstanding 485,000    
Energy Efficiency Investments [Member]      
Warrants issued   167,000  
Fair value of warrants issued   $ 106