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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 |  |  |  |

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