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v3.19.1

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Common Stock [Member] | Additional Paid In Capital [Member] | Accumulated Other Comprehensive Income [Member] | Retained Earnings [Member] | Treasury Stock [Member] | Total
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2016 | $ 17 | $ 280,191 |  | $ (236,902) | $ (258) | $ 43,048
Balance, shares at Dec. 31, 2016 | 16,667,394 |  |  |  |  |
Net loss |  |  |  | (19,288) |  | (19,288)
Common stock issued, net of issuance costs | $ 10 | 15,311 |  |  |  | 15,321
Common stock issued, net of issuance costs, shares | 9,926,396 |  |  |  |  |
Common stock issued for settlement of accounts payable |  | 325 |  |  |  | 325
Common stock issued for settlement of accounts payable, shares | 177,700 |  |  |  |  |
Common stock issued for purchase of lithium mineral interests |  | 110 |  |  |  | 110
Common stock issued for purchase of lithium mineral interests, shares | 100,000 |  |  |  |  |
Common stock issued for commitment fees | $ 1 | 1,213 |  |  |  | 1,214
Common stock issued for commitment fees, shares | 880,000 |  |  |  |  |
Stock compensation expense and related share issuances, net of shares withheld for payment of taxes |  | 101 |  |  |  | 101
Stock compensation expense and related share issuances, net of shares withheld for payment of taxes, shares | 38,834 |  |  |  |  |
Minimum withholding taxes on net share settlements of equity awards |  | (1) |  |  |  | (1)
Unrealized holding gain loss on marketable securities |  |  | 287 |  |  | 287
Transfer to realized loss upon sale of available-for-sale securities |  |  |  |  |  |
Balance at Dec. 31, 2017 | $ 28 | 297,278 | 287 | (256,190) | (258) | 41,117
Balance, shares at Dec. 31, 2017 | 555,806 |  |  |  |  |
Net loss |  |  |  | (3,419) |  | (3,419)
Common stock issued, net of issuance costs |  | 651 |  |  |  | 651
Common stock issued, net of issuance costs, shares | 20,802 |  |  |  |  |
Stock compensation expense and related share issuances, net of shares withheld for payment of taxes |  | 81 |  |  |  | 81
Stock compensation expense and related share issuances, net of shares withheld for payment of taxes, shares | 20 |  |  |  |  |
Unrealized holding gain loss on marketable securities |  |  | (937) |  |  | (937)
Balance at Mar. 31, 2018 |  | 298,010 | (650) | (259,609) | (258) | 37,493
Balance, shares at Mar. 31, 2018 | 576,628 |  |  |  |  |
Balance at Dec. 31, 2017 | $ 28 | 297,278 | 287 | (256,190) | (258) | 41,117
Balance, shares at Dec. 31, 2017 | 555,806 |  |  |  |  |
Net loss |  |  |  | (35,684) |  | (35,684)
Common stock issued, net of issuance costs | $ 32 | 8,683 |  |  |  | 8,715
Common stock issued, net of issuance costs, shares | 32,018,551 |  |  |  |  |
Common stock issued for consulting services |  | 95 |  |  |  | 95
Common stock issued for consulting services, shares | 172,727 |  |  |  |  |
Common stock issued for purchase of lithium mineral interests |  | 114 |  |  |  | 114
Common stock issued for purchase of lithium mineral interests, shares | 200,000 |  |  |  |  |
Common stock, warrants and options issued for acquisition of Alabama Graphite | $ 12 | 6,472 |  |  |  | 6,484
Common stock, warrants and options issued for acquisition of Alabama Graphite, shares | 11,625,210 |  |  |  |  |
Stock compensation expense and related share issuances, net of shares withheld for payment of taxes |  | 332 |  |  |  | 332
Stock compensation expense and related share issuances, net of shares withheld for payment of taxes, shares | 20,931 |  |  |  |  |
Minimum withholding taxes on net share settlements of equity awards |  | (5) |  |  |  | (5)
Unrealized holding gain loss on marketable securities |  |  | (861) |  |  | (861)
Transfer to realized loss upon sale of available-for-sale securities |  |  | 484 |  |  | 484
Balance at Dec. 31, 2018 | $ 1 | 313,012 | (90) | (291,874) | (258) | 20,791
Balance, shares at Dec. 31, 2018 | 1,436,555 |  |  |  |  |
Net loss |  |  |  | (3,174) |  | (3,174)
Common stock issued, net of issuance costs |  | 416 |  |  |  | 416
Common stock issued, net of issuance costs, shares | 57,205 |  |  |  |  |
Stock compensation expense and related share issuances, net of shares withheld for payment of taxes |  | 8 |  |  |  | 8
Stock compensation expense and related share issuances, net of shares withheld for payment of taxes, shares | 393 |  |  |  |  |
Minimum withholding taxes on net share settlements of equity awards |  | (1) |  |  |  | (1)
Transfer to realized loss upon sale of available-for-sale securities |  |  | $ 90 |  |  | 90
Balance at Mar. 31, 2019 | $ 1 | $ 313,435 |  | $ (295,048) | $ (258) | $ 18,130
Balance, shares at Mar. 31, 2019 | 1,494,153 |  |  |  |  |

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