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STOCKHOLDERS' EQUITY (Tables) | 12 Months Ended
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Dec. 31, 2016
Equity [Abstract] |
Summary of Stock Option Activity | A summary of stock option activity is as follows:
| Stock Options (1) |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (years) |  | Aggregate Intrinsic Value
Outstanding, December 31, 2015 | 1,297 |  |  | $ | 7.03 |  |  |  |  |
Granted | 50 |  |  | $ | 12.48 |  |  |  |  |
Exercised | (12 | ) |  | $ | 10.85 |  |  |  |  |
Forfeited or expired | (220 | ) |  | $ | 12.64 |  |  |  |  |
Outstanding, December 31, 2016 | 1,115 |  |  | $ | 6.13 |  |  | 5.8 |  | $ | 7,086 |
Exercisable, December 31, 2016 | 782 |  |  | $ | 5.73 |  |  | 4.6 |  | $ | 5,293 |
Unvested, December 31, 2016 | 373 |  |  | $ | 7.62 |  |  | 8.7 |  | $ | 1,793 |
(1) | Market-based performance stock option grants are included at 100%. Attainment of maximum performance targets and market achievements would result in the issuance of 40 shares of Class A common stock currently included in unvested.
Schedule of Fair Value of Stock Options Weighted Average Assumptions | The weighted average fair value of stock options granted, with the exception of market-based performance stock option grants, during fiscal year 2016, fiscal year 2015, transition period 2014 and fiscal year 2014 were $0, $5.35, $3.62 and $4.22 per option, respectively, which were calculated assuming no expected dividend yield using the following weighted average assumptions:
| Fiscal Year Ended December 31, |  | Eight Months Ended December 31, 2014 |  | Fiscal Year Ended April 30, 2014
| 2016 (1) |  | 2015 |  |
Expected life | 0.0 years |  |  | 7.2 years |  |  | 7.0 years |  |  | 6.8 years |
Risk-free interest rate | — | % |  | 2.02 | % |  | 2.15 | % |  | 2.22 | %
Expected volatility | — | % |  | 81.31 | % |  | 82.76 | % |  | 83.96 | %
(1) | In fiscal year 2016, we only granted market-based performance stock options, which are discussed separately below.
Summary of Restricted Stock, Restricted Stock Unit and Performance Stock Unit Activity | restricted stock, restricted stock unit and performance stock unit activity is as follows:
| Restricted Stock, Restricted Stock Units, and Performance Stock Units (1) |  | Weighted Average Grant Price |  | Weighted Average Remaining Contractual Term (years) |  | Aggregate Intrinsic Value
Outstanding, December 31, 2015 | 962 |  |  | $ | 4.49 |  |  |  |  |
Granted | 608 |  |  | $ | 8.97 |  |  |  |  |
Class A common stock vested | (453 | ) |  | $ | 4.47 |  |  |  |  |
Forfeited or canceled | (18 | ) |  | $ | 5.40 |  |  |  |  |
Outstanding, December 31, 2016 | 1,099 |  |  | $ | 7.03 |  |  | 1.6 |  | $ | 6,330 |
Unvested, December 31, 2016 | 1,286 |  |  | $ | 7.76 |  |  | 1.7 |  | $ | 6,593 |
(1) | Market-based performance stock unit grants are included at 100%. Attainment of maximum performance targets and market achievements would result in the issuance of an additional 187 shares of Class A common stock currently included in unvested.
Accumulated Other Comprehensive Income (Loss) | The changes in the balances of each component of accumulated other comprehensive (loss) income are as follows:
| Marketable Securities |  | Commodity Hedges |  | Total
Balance as of April 30, 2013 | $ | 27 |  |  | $ | (619 | ) |  | $ | (592 | )
Other comprehensive income (loss) before reclassifications | 12 |  |  | (36 | ) |  | (24 | )
Amounts reclassified from accumulated other comprehensive loss | — |  |  | 655 |  |  | 655 |
Other comprehensive income, net | 12 |  |  | 619 |  |  | 631 |
Balance as of April 30, 2014 | 39 |  |  | — |  |  | 39 |
Other comprehensive income | 19 |  |  | — |  |  | 19 |
Balance as of December 31, 2014 | 58 |  |  | — |  |  | 58 |
Other comprehensive loss | (51 | ) |  | — |  |  | (51 | )
Balance as of December 31, 2015 | 7 |  |  | — |  |  | 7 |
Other comprehensive loss | (75 | ) |  | — |  |  | (75 | )
Balance as of December 31, 2016 | $ | (68 | ) |  | $ | — |  |  | $ | (68 | )
Reclassification Out of Accumulated Other Comprehensive Income (Loss) | A summary of reclassifications out of accumulated other comprehensive (loss) income for fiscal year 2016, fiscal year 2015, transition period 2014 and fiscal year 2014 is as follows:
| Fiscal Year Ended December 31, |  | Eight Months Ended December 31, 2014 |  | Fiscal Year Ended April 30, 2014 |  |
| 2016 |  | 2015 |  |  |  |
Details About Accumulated Other Comprehensive (Loss) Income Components | Amounts Reclassified Out of Accumulated Other Comprehensive (Loss) Income |  | Affected Line Item in the Consolidated Statements of Operations
Loss on derivative instruments: |  |  |  |  |  |  |  |  |
GreenFiber commodity hedges | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (405 | ) |  | Loss from equity method investments
| — |  |  | — |  |  | — |  |  | (405 | ) |  | Loss from continuing operations before income taxes and discontinued operations
| — |  |  | — |  |  | — |  |  | (250 | ) |  | Provision for income taxes
| $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (655 | ) |  | Loss from continuing operations before discontinued operations

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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