Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details Narrative)

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Stockholders' Equity (Details Narrative) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
Jan. 31, 2018
Mar. 31, 2018
Mar. 31, 2017
Proceeds from issuance of stock   $ 2,107 $ 10,654
Officers and Directors Purchase Plan [Member]      
Number of shares issued   2,034  
Proceeds from issuance of stock   $ 4  
Restricted Stock Units (RSUs) [Member]      
Number of shares issued   65,600  
Over-Allotment Option [Member]      
Number of shares issued related public offering 1,072,500    
Proceeds from public offering $ 2,100