Quarterly report pursuant to Section 13 or 15(d)

Liquidity Matters - Additional Information (Detail)

v2.4.0.6
Liquidity Matters - Additional Information (Detail) (USD $)
1 Months Ended 3 Months Ended 6 Months Ended 1 Months Ended 1 Months Ended
Oct. 30, 2012
Aug. 31, 2012
Dec. 31, 2012
Dec. 31, 2012
Dec. 31, 2011
Mar. 07, 2012
Dec. 31, 2012
Revolving promissory note
Mar. 07, 2012
Revolving promissory note
Oct. 31, 2011
Revolving promissory note
Jun. 30, 2012
Private Placement [Member]
Dec. 31, 2012
Subsequent Event [Member]
Revolving promissory note
Sep. 24, 2012
Subsequent Event [Member]
Revolving promissory note
Oct. 30, 2012
Subsequent Event [Member]
Private Placement [Member]
Cash Cash Equivalents Short Term Investments and Restricted Investments [Line Items]                          
Shares of common stocks issued 100,000   241,436 2,535,093           1,207,185     241,437
Warrants issued     48,297 507,019                 48,287
Warrant term   5 years               5 years     5 years
Net proceeds from issuance of common stock and warrants $ 4,000   $ 77,000 $ 981,000 $ 0                
Debt instrument, principal amount     $ 1,450,000 $ 1,450,000   $ 250,000 $ 450,000 $ 250,000 $ 1,000,000   $ 285,000 $ 1,500,000