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Restatement of Previously Issued Financial Statements - Impact on Consolidated Statements of Stockholders' Equity (Detail) - USD ($) shares in Thousands, $ in Thousands		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014		Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	[1]	Dec. 31, 2012
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity		$ 54,551	$ 44,181	$ 34,544	$ 26,222	$ 32,820	[1]	$ 26,935	$ 19,523	$ 61,014	$ 65,178		$ 48,740
As Previously Reported [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity				40,251	32,085	38,658		34,392	73,664	68,090			53,896
Prior Period Adjustments [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity				$ (5,707)	$ (5,863)	(5,838)		$ (7,457)	$ (54,141)	$ (7,076)			(5,156)	[1]
Prior Period Adjustments [Member] | Workers' Compensation Corrections [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity						(6,347)							(7,947)
Prior Period Adjustments [Member] | Payroll Tax Corrections [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity						509							(474)
Prior Period Adjustments [Member] | Income Tax Adjustments [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													3,265
Common Stock [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity		$ 72				$ 71	[1]				$ 72		$ 70
Stockholders' equity, Shares		7,203				7,126	[1]				7,165		7,017
Common Stock [Member] | As Previously Reported [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													$ 70
Stockholders' equity, Shares													7,017
Common Stock [Member] | Prior Period Adjustments [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													$ 0
Common Stock [Member] | Prior Period Adjustments [Member] | Workers' Compensation Corrections [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													0
Common Stock [Member] | Prior Period Adjustments [Member] | Payroll Tax Corrections [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													0
Common Stock [Member] | Prior Period Adjustments [Member] | Income Tax Adjustments [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													0
Additional Paid-in Capital [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity		$ 6,964				$ 4,410	[1]				$ 5,781		913
Additional Paid-in Capital [Member] | As Previously Reported [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													913
Additional Paid-in Capital [Member] | Prior Period Adjustments [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													0
Additional Paid-in Capital [Member] | Prior Period Adjustments [Member] | Workers' Compensation Corrections [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													0
Additional Paid-in Capital [Member] | Prior Period Adjustments [Member] | Payroll Tax Corrections [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													0
Additional Paid-in Capital [Member] | Prior Period Adjustments [Member] | Income Tax Adjustments [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													0
Accumulated Other Comprehensive (Loss) Income [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity		(31)				(23)	[1]				(26)		23
Accumulated Other Comprehensive (Loss) Income [Member] | As Previously Reported [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													23
Accumulated Other Comprehensive (Loss) Income [Member] | Prior Period Adjustments [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													0
Accumulated Other Comprehensive (Loss) Income [Member] | Prior Period Adjustments [Member] | Workers' Compensation Corrections [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													0
Accumulated Other Comprehensive (Loss) Income [Member] | Prior Period Adjustments [Member] | Payroll Tax Corrections [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													0
Accumulated Other Comprehensive (Loss) Income [Member] | Prior Period Adjustments [Member] | Income Tax Adjustments [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													0
Retained Earnings [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity		$ 47,546				$ 28,362	[1]				$ 59,351		47,734
Retained Earnings [Member] | As Previously Reported [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													52,890
Retained Earnings [Member] | Prior Period Adjustments [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity	[1]												(5,156)
Retained Earnings [Member] | Prior Period Adjustments [Member] | Workers' Compensation Corrections [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													(7,947)
Retained Earnings [Member] | Prior Period Adjustments [Member] | Payroll Tax Corrections [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													(474)
Retained Earnings [Member] | Prior Period Adjustments [Member] | Income Tax Adjustments [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Stockholders' equity													$ 3,265
[1] See Note 2. Restatement of Previously Issued Consolidated Financial Statements

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 4.E)
-URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29-31)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section E

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