Derivative and Other Financial Instruments and Fair Value Measurements - Additional Information (Detail) $ / shares in Units, t in Millions, BTU in Trillions		3 Months Ended	12 Months Ended
	Jun. 11, 2010 USD ($) $ / shares shares	Mar. 31, 2016 USD ($) BTU t $ / shares shares	Dec. 31, 2015	Mar. 31, 2016 EUR (€) shares	Jun. 30, 2015	Mar. 31, 2015 $ / shares
Derivative [Line Items]
Derivative contracts | t		27.1
Cash collateral posted or held		$ 0
Amount subject to enforceable master netting arrangement not offset		$ 0
Warrant issued to purchase common stock | shares	1,500,000
Aggregate purchase price of common stock warrant	$ 300,000
Warrant vested upon issuance					20.00%
Common stock warrants vesting percentage on each anniversary date					20.00%
Common stock warrants percentage vested					100.00%
Exercise price of warrants | $ / shares	$ 10.30	$ 5.64				$ 5.98
Common stock warrants expiration date		2020-06
Warrants outstanding | shares		1,468,333		1,468,333
Redeemable Preferred Stock
Derivative [Line Items]
Preferred stock redemption period		53 months
Credit spread adjustment percentage		19.50%
Factoring Facility
Derivative [Line Items]
Maximum financing amount | €				€ 50,000,000
Sales of trade accounts receivable		$ 89,900,000
Proceeds from sales of trade accounts receivable		88,400,000
Administrative fees and expenses associated with Factoring Facility		$ 200,000
Maximum
Derivative [Line Items]
Estimated fair value of financing receivable outstanding on number of days		30 days
Common Stock Warrant Liability
Derivative [Line Items]
Valuation technique		Monte Carlo simulation
Volatility		50.80%	49.90%
Expected term		4 years 2 months 12 days	4 years 7 months 6 days
Equity raise probability		60.00%
Equity raise price discount assumption		15.00%
Percentage of increase decrease in unobservable inputs on estimated fair value of common stock warrant liability		10.00%
NABCO
Derivative [Line Items]
Price per share of common stock issued | $ / shares		$ 5.64
Currency Exchange Hedging
Derivative [Line Items]
Currency derivative contracts outstanding		$ 0
Natural Gas | Swap Contract One
Derivative [Line Items]
Forward buy contracts | BTU		1.3