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Consolidated Statements of Changes in Shareholders' Equity - USD ($)
$ in Thousands
Common Stock [Member]
Preferred Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Accumulated Other Comprehensive Loss [Member]
Total
Balance at Dec. 31, 2014 $ 47 $ 124,213 $ (16,809) $ (56) $ 107,395
Balance, shares at Dec. 31, 2014 4,674,610        
Issuance of common stock upon vesting of restricted common stock, net 332 332
Issuance of common stock upon vesting of restricted common stock, net, shares 25,346        
Stock-based compensation 588 588
Realized loss on marketable equity securities 56 $ 56
Revised 2016 option grants, shares           340,711
Net loss (92,896) $ (92,896)
Balance at Dec. 31, 2015 $ 47 125,133 (109,705) 15,475
Balance, shares at Dec. 31, 2015 4,699,956        
Stock-based compensation 213 213
Issuance of common stock $ 3 (3)
Issuance of common stock , shares 367,667        
Cash payment for fractional shares (3) (3)
Cash payment for fractional shares, shares (1,245)          
Issuance of common shares on 7/7/16 to settle ESOP $ 1 169 170
Issuance of common shares on 7/7/16 to settle ESOP, shares 68,128          
Issuance of common shares $ 10 68 78
Issuance of common shares, shares 1,000,000          
Issuance of Series A Convertible Preferred Stock $ 1 1,999 2,000
Issuance of Series A Convertible Preferred Stock, shares 50,000        
Unrealized loss on marketable equity securities (55) $ (55)
Revised 2016 option grants, shares          
Net loss (14,120) $ (14,120)
Balance at Dec. 31, 2016 $ 61 $ 1 127,576 (123,825) (55) 3,758
Balance, shares at Dec. 31, 2016 6,134,506 50,000        
Stock-based compensation 128 128
Unrealized loss on marketable equity securities         (848) (848)
Placement fees recorded in equity (114) (114)
Revised 2016 option grants $ (1) 196 $ 195
Revised 2016 option grants, shares (151,008)         170,000
Issued shares to creditor $ 58 8,845 $ 8,903
Issued shares to creditor, shares 5,819,270        
Net loss (1,360) (1,360)
Balance at Dec. 31, 2017 $ 118 $ 1 $ 136,631 $ (125,185) $ (903) $ 10,662
Balance, shares at Dec. 31, 2017 11,802,768 50,000