Long-Term Debt - Narrative (Detail) (USD $)	12 Months Ended				12 Months Ended	3 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended			0 Months Ended	12 Months Ended				3 Months Ended							3 Months Ended		0 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2012	Dec. 31, 2013 Loan And Security Agreement [Member]	Mar. 31, 2013 July 2012 Credit Agreement [Member]	Dec. 31, 2012 July 2012 Credit Agreement [Member]	Jul. 10, 2012 Term Loan Facility [Member]	Dec. 31, 2013 Term Loan Facility [Member]	Dec. 31, 2012 Term Loan Facility [Member]	Dec. 31, 2013 Term Loan Facility [Member] Loan And Security Agreement [Member]	Jul. 10, 2012 Revolving Credit Facility [Member]	Dec. 31, 2013 Revolving Credit Facility [Member]	Dec. 31, 2012 Revolving Credit Facility [Member]	Dec. 31, 2013 Revolving Credit Facility [Member] Loan And Security Agreement [Member]	Jan. 09, 2013 Revolving Credit Facility [Member] Loan And Security Agreement [Member]	Mar. 31, 2013 Revolving Credit Facility [Member] July 2012 Credit Agreement [Member]	Dec. 31, 2013 Letter of Credit [Member] Loan And Security Agreement [Member]	Dec. 31, 2013 Line of Credit [Member]	Dec. 31, 2013 Line of Credit [Member] Loan And Security Agreement [Member]	Sep. 30, 2012 Standby Letters of Credit [Member]	Jul. 10, 2012 Standby Letters of Credit [Member] Revolving Credit Facility [Member]	Jan. 09, 2013 Standby Letters of Credit [Member] Revolving Credit Facility [Member] Loan And Security Agreement [Member]	Sep. 30, 2012 Swingline loans [Member] Revolving Credit Facility [Member]	Jul. 10, 2012 Swingline loans [Member] Revolving Credit Facility [Member]	Jan. 09, 2013 Swingline loans [Member] Revolving Credit Facility [Member] Loan And Security Agreement [Member]	Dec. 31, 2012 London Interbank Offered Rate (LIBOR) [Member] Term Loan Facility [Member]	Dec. 31, 2013 London Interbank Offered Rate (LIBOR) [Member] Revolving Credit Facility [Member] Loan And Security Agreement [Member]	Dec. 31, 2012 Base Rate [Member] Term Loan Facility [Member]	Dec. 31, 2013 Base Rate [Member] Revolving Credit Facility [Member] Loan And Security Agreement [Member]
Debt Instrument [Line Items]
Debt Instrument, Excess Basis Spread on Variable Interest Rate In Default																														2.00%
Debt Instrument, Term															3 years
Letters of credit outstanding																					$ 12,432,000
Credit facility borrowing capacity								25,000,000			39,482,000				8,400,000
Line of credit, subfacility for standby letters of credit																						20,000,000	20,000,000
Quarterly commitment fee on the average daily unused portion					0.375%									0.50%
Interest margin																											2.50%	1.50%	1.50%	0.50%
Credit facility, remaining borrowing capacity																				19,683,000
Line of credit facility, term								5 years				5 years
Line of credit, subfacility for swingline loans																									10,000,000
Line of credit facility, additional borrowing capacity												25,000,000				20,000,000					1,000,000			3,000,000
Debt financing costs	0	279,005	0							279,000
Deferred financing fees, capitalized		962,000
Borrowings under asset-based revolving credit facility	63,444,175	0	0						25,000,000				11,000,000
Consolidated leverage ratio, maximum				2.75
Fixed charge coverage ratio, minimum				1.25												1.0
Maximum borrowing capacity																								10,000,000
Credit facility borrowing capacity												50,000,000				65,000,000
Revolving credit facility, interest 3.27% (weighted average) and 2.72% at December 31, 2013 and 2012, respectively	8,400,000	10,000,000																11,399,000
Subfacility loans percentage up to aggregate revolver commitments																										10.00%
Aggregate amount of advances under the line of credit (borrowing base)																65,000,000
Line of credit facility, eligible billed accounts receivable per the loan agreement																85.00%
Line of credit facility, eligible unbilled accounts receivable per the loan agreement																85.00%
Line of credit facility, eligible borrowing of unbilled accounts receivable																12,000,000
Write off debt issuance cost						1,124,000	82,000										295,000
Unamortized debt issuance expense																			86,000
Required percentage of aggregate amount of the commitment																12.50%
Required minimum availability under credit facility to avoid negative covenants																$ 6,250,000