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Commitments and Contingencies - Additional Information (Detail) (USD $) | 0 Months Ended | 12 Months Ended |  | 0 Months Ended |  | 6 Months Ended
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Jun. 23, 2014 | Dec. 31, 2013 | Jun. 30, 2014 | Jul. 08, 2014 Subsequent Event [Member] | Jul. 08, 2014 Subsequent Event [Member] Unrestricted Shares [Member] | Jul. 17, 2014 Subsequent Event [Member] Unrestricted Shares [Member] | Jun. 30, 2014 Secured Promissory Note [Member] | Jun. 30, 2014 September Fifteenth Two Thousand Eight [Member] | Jun. 30, 2014 September Eighteenth Two Thousand Eight [Member]
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  |  | September 15, 2008 | September 18, 2008
Settlements on legal matters, common stock |  | $ 5,000,000 |  |  | $ 5,000,000 |  |  |  |
Settlements on legal matters, promissory notes |  | 5,000,000 |  | 5,000,000 |  |  |  |  |
Secured note interest rate percentage |  |  |  |  |  |  | 5.00% |  |
Secured note maturity period |  |  |  |  |  |  | 30 months |  |
Amount for share price fluctuation related to litigation settlement | 725,000 |  |  |  |  |  |  |  |
Probable relief in additional cash payment | 725,000 |  |  |  |  |  |  |  |
Asserted claims not accrued in financial | 725,000 |  |  |  |  |  |  |  |
Settlement funded by insurers for the Company |  | 1,700,000 |  |  |  |  |  |  |
Number of common stock for distribution to class members |  |  |  |  |  | 2,407,318 |  |  |
Accrual of payment in current liabilities |  | 4,326,000 | 4,326,000 |  |  |  |  |  |
Settlements on legal matters, cash |  | 6,000,000 |  |  |  |  |  |  |
Cash portion of the settlements, paid |  | $ 4,300,000 |  | $ 4,300,000 |  |  |  |  |

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