|
Common Stock - Warrant Activity (Detail) (Warrant [Member], USD $)
|
9 Months Ended |
|---|---|
|
Sep. 30, 2014
|
|
|
Warrant [Member]
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | |
| Number of Shares, Outstanding at December 31, 2013 | 711,894 |
| Number of Shares, Warrants cancelled due to expiration | (26,833) |
| Number of Shares, Outstanding at September 30, 2014 | 685,061 |
| Weighted Average Grant Date Fair Value, Unvested balance at December 31, 2013 | $ 6.63 |
| Weighted Average Grant Date Fair Value, Warrants cancelled due to expiration | $ 6.15 |
| Weighted Average Grant Date Fair Value, Unvested balance at September 30, 2014 | $ 6.65 |
| X | ||||||||||
|
- Definition
Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Number of shares under non-option equity instrument agreements for which rights to exercise lapsed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Number of equity instruments other than options outstanding, including both vested and non-vested instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|