Senior Convertible Bonds (Details Textual) $ / shares in Units, $ in Thousands			3 Months Ended		6 Months Ended
	May 02, 2016 USD ($)	Oct. 21, 2015 $ / shares	Jun. 30, 2019 USD ($) $ / shares	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) Bonds $ / shares shares	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)	May 02, 2018
Senior Convertible Bonds (Textual)
Interest expense			$ 54	$ 0	$ 111	$ 0
Convertible bonds			3,470		3,470		$ 3,470
Principal amount			32,549		32,549		32,667
Unamortized Debt discount, net			$ (8,060)		$ (8,060)		$ (993)
Average Company stock price | $ / shares			$ 0.774		$ 0.774
Stock issued to bondholders | shares					422,426
Debt discount on derivative liability			$ 1,626		$ 1,626
Convertible Debt [Member]
Senior Convertible Bonds (Textual)
Debt instrument, maturity date					May 02, 2021
Debt instrument payment description					Payable annually in arrears on May 2 of each year, commencing May 2, 2017.
Senior unsecured notes interest rate			10.00%		10.00%			10.00%
Debt conversion, description					At any time prior to the close of business on the business day immediately preceding April 2, 2021, holders may convert their notes into Common Stock at the conversion rate of 44 shares per $100 bond (which is equivalent to a conversion rate of approximately $2.27 per share).
Amortization expense					$ 13
Convertible bonds			$ 1,844		1,844
Principal amount			3,470		3,470
Unamortized Debt discount, net			$ 187		187
Financing gains associated notes converted to shares					$ 10
Convertible Debt [Member] | Debt Issue [Member]
Senior Convertible Bonds (Textual)
Debt instrument payment description					The interest was paid-in-kind ("PIK") in the form of Common Stock. An average of the Company stock price of $0.774 was determined based on the 30 trading days prior to the record date of April 18, 2019. This figure was used to divide into 10% of the par value of the bonds held by the holders. The Company issued 422,426 shares to the accounts of its bondholders.
IPO [Member]
Senior Convertible Bonds (Textual)
Debt instrument, maturity date		May 02, 2021
Convertible bonds purchase price | $ / shares		$ 100
Senior unsecured notes interest rate		10.00%
Debt conversion, description					Under the rights offering, the Company distributed at no cost, 360,000 non-transferable subscription rights to subscribe for, on a per right basis, two 10% Convertible Senior Bonds par $100 due May 2, 2021 (the "Notes"), to shareholders of the Company's Common Stock on October 15, 2015, the record date for the offering. Each whole subscription right entitled the participant to purchase two convertible bonds at a purchase price of $100 per bond.
Principal amount	$ 3,470
Expenses from rights offering	136
Net proceeds from sale of the Notes	$ 3,334
IPO [Member] | Convertible Debt [Member]
Senior Convertible Bonds (Textual)
Debt instrument, maturity date					May 02, 2021
Debt instrument payment description					The number of shares for the payment of interest in shares of Common Stock, in lieu of the cash amount, will be based on the average of the closing prices of the Company's Common Stock as reported by Bloomberg L.P. for the 30 trading days preceding the record date for the payment of interest; such record date has been designated and will always be the 10th business day prior to the interest payment date on May 2 of each year. The number of shares for the payment of principal, in lieu of the cash amount, shall be based upon the average of the closing price of the Company's Common Stock as reported by Bloomberg L.P. for the 30 trading days preceding the principal repayment date; such record date has been designated as the trading day immediately prior to the 30-day period preceding the maturity date of May 2, 2021.
Description of note redeemption					The Company was entitled to redeem for cash the outstanding Notes at an amount equal to the principal and accrued and unpaid interest, plus a 10% premium.
Senior unsecured notes interest rate								10.00%
IPO [Member] | Convertible Debt [Member] | Debt Issue [Member]
Senior Convertible Bonds (Textual)
Convertible bonds purchase price | $ / shares			$ 2.27		$ 2.27
Interest expense			$ 28	$ 71	$ 38	$ 156
Number of convertible bonds | Bonds					122
Convertible bond price					$ 1
Common stock issued | shares					5,368
Financial gains					$ 10