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STOCKHOLDERS' EQUITY (Tables)
 12 Months Ended
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