Long-Term Debt - Additional Information (Detail) (USD $)	12 Months Ended	1 Months Ended	12 Months Ended			1 Months Ended				1 Months Ended	12 Months Ended				1 Months Ended
	Dec. 31, 2013 Installment	Apr. 30, 2013 Term Loan Facility [Member]	Dec. 31, 2012 Term Loan Facility [Member]	Mar. 31, 2012 Term Loan Facility [Member]	Mar. 31, 2012 Accounts Receivable Facility [Member]	Mar. 31, 2012 Term Loan [Member]	Mar. 31, 2012 LIBOR Rate [Member] Term Loan [Member]	Mar. 31, 2012 Prime Rate [Member] Term Loan [Member]	Dec. 31, 2013 Prime Rate [Member] Term Loan [Member]	Apr. 30, 2013 Series E Preferred Stock [Member]	Dec. 31, 2012 Series E Preferred Stock [Member]	Dec. 31, 2012 Series E Preferred Stock [Member] Minimum [Member]	Dec. 31, 2012 Series E Preferred Stock [Member] Maximum [Member]	Dec. 31, 2012 Series D Preferred Stock [Member]	Aug. 31, 2013 Equipment [Member]	Aug. 31, 2013 Office Building Lease [Member]
Proforma Debt Instrument [Line Items]
Line of credit facility, borrowing capacity				$ 23,000,000	$ 2,000,000
Line of credit facility, due date						2016-07
Line of credit facility, interest rate							8.39%	3.70%
Floor rate							0.50%	6.95%
Interest rate at end of period									3.25%
Percentage of fee payment on unused portion of revolver borrowings	0.075%
Number of installments	30
Percentage of principal at the end of term payment	5.50%
Credit facility, additional borrowing capacity		5,000,000	13,000,000
Credit facility, interest rate		8.89%	8.89%
Number of shares issuable upon exercise of warrants										10,418	20,837			76,940
Exercise price of warrants											14.40			8.45
Warrant term											10 years
Fair value of warrants on the date of issuance										138,000	648,000
Fair value of warrants, volatility rate assumed										57.00%		58.00%	61.00%
Fair value of warrants, risk free rate assumed										1.70%		1.63%	2.20%
Term of lease															3 years	5 years
Lease expiration date															2016-07
Amount financed under lease	$ 410,000														$ 410,000	$ 843,000
Interest rate accrues on the unpaid balance																10.00%