|
Quarterly Information (Unaudited) - Statement of Operations Data (Parenthetical) (Detail) (USD $)
|
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|
| Schedule Of Quarterly Financial Information [Line Items] | |||
| Valuation allowance, reversed | $ 373,000 | $ (677,000) | $ 933,000 |
|
Xively [Member]
|
|||
| Schedule Of Quarterly Financial Information [Line Items] | |||
| Valuation allowance, reversed | $ (677,000) | ||