Subsequent Events - Additional Information (Detail)			9 Months Ended
	Nov. 06, 2015 USD ($) Investor $ / shares	Oct. 02, 2015 USD ($)	Sep. 30, 2015	Dec. 31, 2014
7.75% Senior Secured Notes Due 2019 [Member]
Subsequent Event [Line Items]
Debt instrument, interest rate			7.75%	7.75%
Maturity date			Aug. 01, 2019
Subsequent Events [Member] | Leidos Contract Amendment [Member] | Initial Short Term Payment Terms [Member] | Maximum [Member]
Subsequent Event [Line Items]
Terms		Net 60 day terms
Outstanding payable balance limit		Up to $50 million
Subsequent Events [Member] | Leidos Contract Amendment [Member] | Initial Short Term Payment Terms [Member] | Minimum [Member]
Subsequent Event [Line Items]
Terms		Net 30 day terms
Outstanding payable balance limit		In excess of $50 million
Subsequent Events [Member] | Leidos Contract Amendment [Member] | Final Term Payment Terms [Member]
Subsequent Event [Line Items]
Terms		Net 30 day terms
Payment terms trigger date		Within 72 hours after closing financing, but no later than December 10, 2015
Payments due at time of trigger date		All outstanding invoices that are more than 30 days old
Subsequent Events [Member] | Leidos Contract Amendment [Member] | Direct Cost Mark-Up [Member]
Subsequent Event [Line Items]
Original mark-up		4.50%
Amended mark-up		2.25%
Amended mark-up reduction application limit		$ 70,000,000
Amended increase in overhead charges		$ 6,200,000
Subsequent Events [Member] | Financing Commitment [Member]
Subsequent Event [Line Items]
Amount of financing commitment	$ 260,000,000
Subsequent Events [Member] | Financing Commitment [Member] | Minimum [Member]
Subsequent Event [Line Items]
Number of investors | Investor	1
Subsequent Events [Member] | Financing Commitment [Member] | Commitment if the Preferred Stock and warrants are not issued in certain circumstances [Member]
Subsequent Event [Line Items]
Fees as a percentage of committed financing	3.00%
Subsequent Events [Member] | Financing Commitment [Member] | Commitment Fees [Member]
Subsequent Event [Line Items]
Fees as a percentage of committed financing	2.00%
Dollar amount of fees	$ 5,200,000
Subsequent Events [Member] | Financing Commitment [Member] | Funding Fees [Member]
Subsequent Event [Line Items]
Fees as a percentage of committed financing	2.00%
Dollar amount of fees	$ 5,200,000
Subsequent Events [Member] | Financing Commitment [Member] | Cumulative Redeemable Nonconvertible Perpetual Non Voting Preferred Stock [Member]
Subsequent Event [Line Items]
Amount of preferred stock	$ 210,000,000
Convertible preferred stock dividend rate	14.00%
Participations rights percentage	2.00%
Percentage of voting rights	19.99%
Subsequent Events [Member] | Financing Commitment [Member] | Preferred Stock Warrants [Member]
Subsequent Event [Line Items]
Percentage of outstanding common stock related to warrants	17.99%
Exercise price | $ / shares	$ 0.01
Maximum term of warrants	10 years
Subsequent Events [Member] | Financing Commitment [Member] | 12% Senior Secured Notes [Member]
Subsequent Event [Line Items]
Aggregate principal amount of notes	$ 50,000,000
Debt instrument, interest rate	12.00%
Debt instrument, maximum potential interest rate	13.50%
Maturity date	Aug. 30, 2019
Subsequent Events [Member] | Financing Commitment [Member] | 12% Senior Secured Notes [Member] | August 2016 [Member]
Subsequent Event [Line Items]
Redemption Price	106.00%
Subsequent Events [Member] | Financing Commitment [Member] | 12% Senior Secured Notes [Member] | August 2017 [Member]
Subsequent Event [Line Items]
Redemption Price	103.00%
Subsequent Events [Member] | Financing Commitment [Member] | 12% Senior Secured Notes [Member] | August 2018 [Member]
Subsequent Event [Line Items]
Redemption Price	100.00%
Subsequent Events [Member] | Financing Commitment [Member] | 7.75% Senior Secured Notes Due 2019 [Member]
Subsequent Event [Line Items]
Aggregate principal amount of notes	$ 425,000,000