Quarterly report pursuant to sections 13 or 15(d)

Liquidity - Additional Information (Detail)

v2.4.0.6
Liquidity - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
9 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Mar. 31, 2012
Short-term Debt [Line Items]      
Proceeds from issuance of convertible debt and equity financing $ 2,000 $ 6,989 $ 9,700