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Equity Securities (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended
Mar. 06, 2017
Nov. 24, 2016
Jun. 30, 2016
Nov. 18, 2014
Jun. 30, 2016
Nov. 30, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Oct. 31, 2014
Jun. 30, 2014
Net proceeds from sale of common stock           $ 34,200          
Purchase of common stock by underwriter, granted             805,000        
Exercise price             $ 11.25        
Exercise price above offering price             25.00%        
Warrant exercisable period after effective date of registration             180 days        
Warrant exercisable ending period from effective date of registration             5 years        
Fair value of warrant issued of underwriting fee             $ 2,772        
Common stock issuable under outstanding             42,701 35,942   1,000  
Perfectly maintained Long Term Investor Rights aggregate common stock   1,226,854                  
Highest average closing price on NASDAQ   $ 13.96                  
Share entitlement price for perfectly maintained Long Term Investor Right   $ 0.2894                  
Rounded up of next whole share aggregate maximum shares   355,095                  
Number of shares issued for services             82,000 23,136      
Shares issued for services to directors, amount             $ 324 $ 285 $ 166    
Accrued services, shares             77,000 33,293 16,204    
Accrued services, Closing price per share             $ 1.98 $ 6.15 $ 10.26    
Accrued services             $ 153 $ 205 $ 166    
Long Term Investor Rights [Member]                      
Common stock issuable under outstanding             355,095        
Share price (in dollars per share)             $ 18.00        
November 2014 IPO [Member]                      
Sale of common stock to new investors       4,025,000              
Sale of common stock upon exercise of underwriter's over-allotment option       525,000              
Net proceeds from sale of common stock       $ 34,200              
Net offering costs       5,000              
Fair value of net offering cost from warrants and common stock       $ 2,900              
2014 Private Placement [Member]                      
Sale of common stock to new investors                 1,299,853    
Net proceeds from sale of common stock                 $ 9,100    
Exercise price                 $ 7.00    
2014 Private Placement [Member] | Mendelsohn Investment Services, LLC [Member]                      
Payment of finder's fee shares of common stock                 $ 26,785    
Payment of additional finder's fee shares of common stock                 $ 37,599    
Right Offering [Member]                      
Proceeds from issuance or sale of shares     $ 19,500   $ 19,500            
Number of shares issued upon right offering         5,978,465            
Share price (in dollars per share)     $ 3.315   $ 3.315            
Percentage of company's stock price at the close of the rights offering         85.00%            
Right Offering [Member] | Subsequent Event [Member]                      
Proceeds from issuance or sale of shares $ 19,700                    
Number of shares issued upon right offering 13,700,000                    
Share price (in dollars per share) $ 1.47                    
Additional share price $ 1.47                    
Term of warrants 5 years                    
Description for redemption of warrants

The warrants are redeemable on 30 days’ notice (i) at any time 24 months after the date of issuance, (ii) if the shares of the Company’s common stock are trading at $2.94, which is 200% of the Subscription Price, for 15 consecutive trading days and (iii) if all of the independent directors vote in favor of redeeming the warrants. Holders may be able to sell or exercise warrants prior to any announced redemption date and the Company will redeem outstanding warrants not exercised by the announced redemption date for a nominal amount of $0.01 per Warrant.

                    
Common Stock [Member]                      
Increase authorized shares                     200,000,000
Par value                     $ 0
Number of shares issued for services             82 23 22    
Shares issued for services to directors, amount                    
Preferred Stock [Member]                      
Increase authorized shares                     10,000,000
Par value                     $ 0