Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013 Lawsuits	Dec. 31, 2012
Accounting Policies and General Information [Line Items]
Amount insured by FDIC	$ 250,000
Deferred offering costs		5,156,000
Advertising expenses	1,553,000	1,610,000	1,694,000
Gain on litigation settlement		31,000	6,975,000
Gain from Insurance Proceeds			960,000
Cost incurred from lawsuits settlement		1,407,000
Number of lawsuits		2
Deferred financing costs	643,000	321,000
Amortization expense related to financing costs	159,000	175,000	175,000
Write-off of debt issuance costs, included in interest expense	233,000
Share-based compensation	300,000		4,658,000
Continuing Operations [Member]
Accounting Policies and General Information [Line Items]
Intangible asset impairment	0	0	352,000
Maximum [Member]
Accounting Policies and General Information [Line Items]
Estimated useful life	6 years
Minimum [Member]
Accounting Policies and General Information [Line Items]
Estimated useful life	4 years
Administrative [Member]
Accounting Policies and General Information [Line Items]
Share-based compensation	0	0	4,658,000
Other Operating Expenses [Member]
Accounting Policies and General Information [Line Items]
Cost incurred from lawsuits settlement		881,000
Customer Relationships [Member] | Maximum [Member]
Accounting Policies and General Information [Line Items]
Estimated useful life	15 years
Customer Relationships [Member] | Minimum [Member]
Accounting Policies and General Information [Line Items]
Estimated useful life	10 years
Non-competition Agreements [Member] | Maximum [Member]
Accounting Policies and General Information [Line Items]
Estimated useful life	5 years
Non-competition Agreements [Member] | Minimum [Member]
Accounting Policies and General Information [Line Items]
Estimated useful life	2 years
Trademarks and Trade Names [Member] | Maximum [Member]
Accounting Policies and General Information [Line Items]
Estimated useful life	15 years
Trademarks and Trade Names [Member] | Minimum [Member]
Accounting Policies and General Information [Line Items]
Estimated useful life	8 years
Vehicles [Member]
Accounting Policies and General Information [Line Items]
Estimated useful life, description	The shorter of lease life or five years
Furniture, Fixtures and Equipment[Member] | Maximum [Member]
Accounting Policies and General Information [Line Items]
Estimated useful life	5 years
Furniture, Fixtures and Equipment[Member] | Minimum [Member]
Accounting Policies and General Information [Line Items]
Estimated useful life	3 years
Equipment [Member] | Maximum [Member]
Accounting Policies and General Information [Line Items]
Estimated useful life	5 years
Equipment [Member] | Minimum [Member]
Accounting Policies and General Information [Line Items]
Estimated useful life	3 years
Leasehold Improvements [Member]
Accounting Policies and General Information [Line Items]
Estimated useful life, description	The shorter of lease life or five years
Building [Member]
Accounting Policies and General Information [Line Items]
Estimated useful life	30 years
Revenue [Member] | Customer Concentration Risk [Member]
Accounting Policies and General Information [Line Items]
Net revenues percentage	100.00%	100.00%	100.00%
Revenue [Member] | Customer Concentration Risk [Member] | Maximum [Member]
Accounting Policies and General Information [Line Items]
Net revenues percentage	3.00%	3.00%	3.00%
IPO [Member]
Accounting Policies and General Information [Line Items]
Total offering costs charged against equity	8,700,000
Secondary Public Offering [Member]
Accounting Policies and General Information [Line Items]
Total offering costs charged against equity	$ 126,000