Acquisitions - Narrative (Detail)			1 Months Ended	3 Months Ended								12 Months Ended
	Oct. 30, 2015 USD ($) shares	Jun. 30, 2014 USD ($) location $ / shares	Dec. 31, 2013 USD ($) branch specialty	Dec. 31, 2015 USD ($) state client specialty	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($) location $ / shares	Mar. 31, 2014 USD ($)	Dec. 31, 2015 USD ($) state client specialty	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Jun. 29, 2014 USD ($)	Dec. 02, 2013 USD ($)
Business Acquisition, Contingent Consideration [Line Items]
Goodwill				$ 95,096,000				$ 90,647,000				$ 95,096,000	$ 90,647,000
Acquisition of assets of Medical Staffing Network, net of cash acquired												28,870,000	44,631,000	$ 28,700,000
Noncontrolling interest fair value assessment, discounted cash flow method, utilization percentage		80.00%
Noncontrolling interest fair value assessment, guideline public company method, utilization percentage		10.00%
Noncontrolling interest fair value assessment, mergers and acquisition method, utilization percentage		10.00%
Acquisition and integration costs												902,000	7,957,000	473,000
Adjustment for nonrecurring costs in Net Loss				$ (5,927,000)	$ 5,151,000	$ 2,680,000	$ 3,050,000	(20,087,000)	$ (7,484,000)	$ (3,181,000)	$ (782,000)	$ 4,954,000	(31,534,000)	(51,969,000)
Mediscan
Business Acquisition, Contingent Consideration [Line Items]
Cash consideration, adjusted for working capital	$ 29,900,000
Cash purchase price paid at closing	28,000,000
Fair value of shares	$ 4,723,000
Fair value of shares (in shares) | shares	349,871
Contingent consideration, range of outcomes, high	$ 7,000,000
Number of states | state				11								11
Number of clients (more than) | client				300								300
Number of specialties (more than) | specialty				70								70
Revenues												$ 6,700,000
Net income												300,000
Finite-lived intangible assets	17,200,000
Goodwill	14,338,000
Acquisition costs												700,000
Consideration transferred	36,912,000
Other intangible assets	$ 17,200,000
Weighted average useful life (in years)	10 years
Medical Staffing Network
Business Acquisition, Contingent Consideration [Line Items]
Contingent liability		$ 2,500,000		$ 2,200,000						2,500,000		2,200,000
Change in amount of contingent consideration		(300,000)
Finite-lived intangible assets		11,200,000								11,200,000
Goodwill		13,381,000								13,381,000
Acquisition costs													2,200,000
Consideration transferred		47,100,000
Cash Acquired from Acquisition		1,000,000
Acquisition of assets of Medical Staffing Network, net of cash acquired		44,600,000
Business combination, amount deposited in escrow, working capital adjustment		$ 1,000,000								$ 1,000,000
Business combination, amount received from escrow, working capital adjustment								200,000
Period of deferred consideration (in months)		21 months
Number of locations of operations | location		55								55
Gross accounts receivable		$ 38,100,000								$ 38,100,000
Receivables not expected to be collected		800,000								800,000
Claim attached		2,300,000								2,300,000
Policy limit		5,000,000.0								5,000,000.0
Estimated fair value of professional liabilities related to stop loss policy		5,600,000								5,600,000
Estimated recovery receivable related to stop loss policy		400,000								400,000
Policy, coverage per occurrence		1,000,000								1,000,000
Policy coverage		5,000,000								5,000,000
Excess layer limit per occurrence		1,000,000.0								1,000,000.0
Excess layer limit		6,000,000.0								6,000,000.0
Other intangible assets		$ 17,100,000								17,100,000
Weighted average useful life (in years)		11 years
Noncontrolling interest		$ 324,000								324,000
Acquisition and integration costs													7,300,000
On Assignment
Business Acquisition, Contingent Consideration [Line Items]
Finite-lived intangible assets			$ 14,000,000											14,000,000
Goodwill			14,600,000											14,600,000		$ 14,554,000
Acquisition costs			500,000
Consideration transferred			$ 28,700,000
Other intangible assets																$ 14,000,000
Weighted average useful life (in years)			14 years
Acquisition and integration costs													700,000	500,000
Cash			$ 24,700,000											24,700,000
Number of branch-based employees | branch			84
Number of staffing specialties acquired | specialty			125
Number of branch offices acquired | branch			23
MDA Holdings Inc
Business Acquisition, Contingent Consideration [Line Items]
Escrow deposit balance				800,000								800,000
Acquisition-related Costs | Mediscan
Business Acquisition, Contingent Consideration [Line Items]
Adjustment for nonrecurring costs in Net Loss												800,000
Acquisition-related Costs | Medical Staffing Network
Business Acquisition, Contingent Consideration [Line Items]
Adjustment for nonrecurring costs in Net Loss													6,200,000
Subordinated Debt | Medical Staffing Network
Business Acquisition, Contingent Consideration [Line Items]
Long-term Debt		55,000,000								55,000,000
Term Loan Facility
Business Acquisition, Contingent Consideration [Line Items]
Long-term Debt				29,214,000				28,989,000				29,214,000	28,989,000
Term Loan Facility | Medical Staffing Network
Business Acquisition, Contingent Consideration [Line Items]
Long-term Debt		$ 30,000,000								30,000,000
Term (in years)		5 years
Convertible Notes Payable
Business Acquisition, Contingent Consideration [Line Items]
Long-term Debt				19,229,000				$ 17,947,000				19,229,000	$ 17,947,000
Convertible Notes Payable | Medical Staffing Network
Business Acquisition, Contingent Consideration [Line Items]
Long-term Debt		$ 25,000,000								$ 25,000,000
Term (in years)		6 years
Debt conversion price (usd per share) | $ / shares		$ 7.10								$ 7.10
Revolving Credit Facility
Business Acquisition, Contingent Consideration [Line Items]
Long-term Debt				8,000,000								8,000,000
Revolving Credit Facility | Line of Credit | On Assignment
Business Acquisition, Contingent Consideration [Line Items]
Long-term Debt			$ 4,500,000											4,500,000
First Lien Loan Agreement | Revolving Credit Facility
Business Acquisition, Contingent Consideration [Line Items]
Credit facility borrowing capacity		$ 85,000,000.0		$ 85,000,000.0						$ 85,000,000.0		$ 85,000,000.0			$ 65,000,000.0
Trade Names | Medical Staffing Network
Business Acquisition, Contingent Consideration [Line Items]
Other intangible assets		$ 5,900,000								5,900,000
Trade Names | Mediscan
Business Acquisition, Contingent Consideration [Line Items]
Finite-lived intangible assets	$ 3,200,000
Intangible assets- useful life (in years)	11 years
Customer Relationships | Mediscan
Business Acquisition, Contingent Consideration [Line Items]
Finite-lived intangible assets	$ 5,200,000
Intangible assets- useful life (in years)	10 years
Customer Relationships | Medical Staffing Network
Business Acquisition, Contingent Consideration [Line Items]
Intangible assets- useful life (in years)		13 years
Other intangible assets		$ 4,700,000								4,700,000
Customer Relationships | On Assignment
Business Acquisition, Contingent Consideration [Line Items]
Intangible assets- useful life (in years)			16 years
Other intangible assets			$ 10,400,000											10,400,000
Customer Lists | Mediscan
Business Acquisition, Contingent Consideration [Line Items]
Finite-lived intangible assets	$ 8,800,000
Intangible assets- useful life (in years)	10 years
Customer Lists | Medical Staffing Network
Business Acquisition, Contingent Consideration [Line Items]
Intangible assets- useful life (in years)		10 years
Other intangible assets		$ 6,500,000								$ 6,500,000
Customer Lists | On Assignment
Business Acquisition, Contingent Consideration [Line Items]
Intangible assets- useful life (in years)			10 years
Other intangible assets			$ 3,400,000											3,400,000
Noncompete Agreements | On Assignment
Business Acquisition, Contingent Consideration [Line Items]
Intangible assets- useful life (in years)			5 years
Other intangible assets			$ 200,000											$ 200,000