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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 |  |  |

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