Commitments and Contingencies - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended			1 Months Ended	0 Months Ended	1 Months Ended
	Dec. 31, 2014 Option	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 29, 2016	Jan. 01, 2015	Feb. 28, 2015
Commitments And Contingencies [Line Items]
Lease agreement term	10 years
Operating lease commencement	2016-04
Operating lease extension term	5 years
Operating lease initial monthly base rent	$ 88,356
Number of operating lease extension options	2
Percentage of increase in annual base rent	3.00%	3.00%
Property management fee, percentage on base rent	3.00%
Operating lease rent abatement period	3 months
Operating lease agreement rent expense		1,400,000	1,200,000	856,000
Purchase obligations	6,700,000	6,700,000
One-Year Lease Agreement [Member]
Commitments And Contingencies [Line Items]
Lease agreement term	1 year
Operating lease commencement	2015-03
Operating lease initial monthly base rent	52,537
Property management fee, percentage on base rent	3.00%
Lease Amendment [Member]
Commitments And Contingencies [Line Items]
Operating lease extension term	3 years
Number of operating lease extension options	1
Percentage of increase in annual base rent	2.00%	2.00%
Lease amendment effective date	2014-11
Operating lease agreement expiration extended date	2025-01
Lease Amendment [Member] | Scenario, Forecast [Member]
Commitments And Contingencies [Line Items]
Operating lease initial monthly base rent					63,473
Subsequent Event [Member]
Commitments And Contingencies [Line Items]
Operating lease initial monthly base rent						150,361
Subsequent Event [Member] | Lease Amendment [Member]
Commitments And Contingencies [Line Items]
Operating lease initial monthly base rent							$ 38,205