Commitments - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Contractual Obligation [Line Items]
Lease agreement amount	$ 1,693,000	$ 381,000
Equipment finance agreement for purchase of furniture	227,000
Equipment finance agreement term	60 months
Equipment finance agreement interest rate	8.90%
Master Lease Agreement [Member]
Contractual Obligation [Line Items]
Lease agreement amount	2,000,000
Lease term period	36 months
Floating rate until acceptance of master lease	0.03026
Increase in Floating rate for every five basis point increase	0.000069966
Floating lease rate	Until such final acceptance of the lease there is a floating lease rate factor of 0.03026 that shall increase 0.000069966 for every five basis point increase in thirty-six month Interest Swap Rates
Purchase of equipment as per first equipment schedule	967,000
Availability under equipment leasing line	1,033,000
Other Lease Agreement [Member] | Computer Equipment and Computer Software [Member]
Contractual Obligation [Line Items]
Lease agreement amount	537,000
Lease term period	36 months
Buyout option	$ 1
Minimum [Member] | Other Lease Agreement [Member] | Computer Equipment and Computer Software [Member]
Contractual Obligation [Line Items]
Interest rate	1.00%
Maximum [Member] | Other Lease Agreement [Member] | Computer Equipment and Computer Software [Member]
Contractual Obligation [Line Items]
Interest rate	11.20%