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STOCKHOLDERS' EQUITY AND DILUTIVE EQUITY INSTRUMENTS (Tables) | 6 Months Ended
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Jun. 30, 2019
Equity [Abstract] |
Reclassifications from Accumulated Other Comprehensive Income (Loss) to Condensed Consolidated Statement of Operations | The following table summarizes the reclassifications from accumulated other comprehensive income (loss) to the condensed consolidated statement of operations for the three and six months ended June 30, 2019 and 2018:
|  | Three Months Ended |  |  | Six Months Ended |  |  | Affected line item in the condensed
(In thousands) |  | June 30, 2019 |  |  | June 30, 2018 |  |  | June 30, 2019 |  |  | June 30, 2018 |  |  | consolidated statements of operations
Balance at beginning of period |  | $ | 2,194 |  |  |  | (446 | ) |  |  | 2,194 |  |  |  | (147 | ) |  |
Losses recognized in OCI |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (660 | ) |  |
Realized gains on available for sale securities |  |  | — |  |  |  | 43 |  |  |  | — |  |  |  | 404 |  |  | Interest income and other, net
Net period OCI |  |  | — |  |  |  | 43 |  |  |  | — |  |  |  | (256 | ) |  |
Tax effect |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |
Total gains for the period, net of tax |  |  | — |  |  |  | 43 |  |  |  | — |  |  |  | (256 | ) |  |
Balance at end of period |  | $ | 2,194 |  |  |  | (403 | ) |  |  | 2,194 |  |  |  | (403 | ) |  |
Summary of Common Shares and Creditor Warrants and Sum of Common Shares and Creditor Warrants Outstanding | Common shares and creditor warrants and the sum of common shares and creditor warrants outstanding at June 30, 2019 and 2018 were as follows:
Total shares outstanding including warrants |  | June 30, 2019 |  |  | June 30, 2018 |
Common shares outstanding |  |  | 37,845,158 |  |  |  | 26,085,274 |
New Creditor Warrants (strike price $0.001 per common share) |  |  | 2,034,235 |  |  |  | 3,924,441 |
GulfMark Creditor Warrants (strike price $0.01 per common share) |  |  | 1,683,147 |  |  |  | — |
Total |  |  | 41,562,540 |  |  |  | 30,009,715 |

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