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Subsequent Events (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended
Jun. 19, 2019
Dec. 19, 2018
Mar. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Repayment of credit facility       $ 600 $ 23
Description on notification received   The Company received a notification letter from The Nasdaq Stock Market LLC ("Nasdaq") indicating that for 30 consecutive business days the Company's common stock did not maintain a minimum closing bid price of $1.00 per share as required by Nasdaq Listing Rule 5550(a)(2). Consistent with the Rule, Nasdaq initially provided the Company with a compliance period of 180 calendar days, or until June 17, 2019, to regain compliance with the Rule. To regain compliance with the Rule, the closing bid price of the Company's common stock must meet or exceed $1.00 per share for at least ten consecutive business days during this 180 calendar day period.      
Minimum closing bid price per share   $ 1.00      
Subsequent Event [Member]          
Description on notification received Nasdaq notified the Company that, although the Company has not regained compliance with the minimum $1.00 closing bid price per share requirement, Nasdaq has determined that the Company was eligible for an additional 180 calendar day period, or until December 16, 2019, to regain compliance with the minimum bid price requirement. The second 180-day period relates exclusively to the $1.00 closing bid price deficiency, and the Company may be delisted during the 180-day period for failure to maintain compliance with any other Nasdaq listing requirements for which the Company is currently on notice or which occurs during the 180-day period.        
Minimum closing bid price per share $ 1.00        
Subsequent Event [Member] | Credit Agreement [Member]          
Repayment of credit facility     $ 900    
Credit facility maturity date     Jul. 31, 2019