Annual report pursuant to Section 13 and 15(d)

Barter Transaction - Additional Information (Detail)

v2.4.1.9
Barter Transaction - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2012
Health Care Organizations [Abstract]  
Gain on non-monetary transaction $ 151,000us-gaap_NonmonetaryTransactionGainLossRecognizedOnTransfer
Laboratory capital assets exchanged for barter credit $ 0us-gaap_NonmonetaryTransactionAmountOfBarterTransaction