Fair Value Measurements - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial assets, fair value		$ 0
Financial liabilities, fair value		0
Contingent consideration liability	900,000
Potential payments liability		Sep. 30, 2014
Contingent consideration adjustment	400,000
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nonfinancial assets measured at fair value		0	0
Nonfinancial liabilities measured at fair value		$ 0	$ 0