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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Operating activities:    
Net loss $ (1,349) $ (1,555)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation 7 9
Stock-based compensation 81 69
Changes in operating assets and liabilities:    
Prepaid expenses and other assets (876) (1,137)
Accounts payable and other current liabilities (2) (1,196)
Net cash used in operating activities (2,139) (3,810)
Investing activities:    
Purchase of property, plant and equipment (22) (2)
Net cash used in investing activities (22) (2)
Financing activities:    
Proceeds from issuance of common stock, net of issuance costs   86
Payment of preferred stock dividend (50) (50)
Net cash provided by / (used in) financing activities (50) 36
Effect of exchange rate changes on cash and cash equivalents 26 (15)
Net decrease in cash and cash equivalents (2,185) (3,791)
Cash and cash equivalents, beginning of period 23,910 16,520
Cash and cash equivalents, end of period 21,725 12,729
Cash received during the period for:    
Interest 69 12
Taxes   8
Non cash financing activities:    
Accrual of preferred stock dividends $ 50 $ 50