Reporting Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Sep. 30, 2016	Mar. 31, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenue	$ 187,565		$ 233,524
Gross profit	34,119		43,275
Operating profit	(5,859)		(3,821)
Other income (expense), net	(413)		(149)
Income before income taxes	(6,272)		(3,970)
Restructuring and other related costs	0		49
Proceeds from sale of assets	2		0
Assets	304,947			$ 289,292
Depreciation and amortization	2,110		3,082
Enterprise Talent Solutions [Member] | CDI AndersElite Limited Disposition [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Segment Reporting Information [Line Items]
Loss on disposition of business interests		$ 11,301
Revenue			22,965
Gross Profit			3,859
Operating and administrative expenses			4,369
Operating loss			(509)
Depreciation and amortization	0		200
Operating Segments [Member] | Enterprise Talent Solutions [Member]
Segment Reporting Information [Line Items]
Revenue	102,161		139,649
Gross profit	10,314		16,481
Operating profit	1,780		1,135
Restructuring and other related costs	0		12
Assets	115,100			102,770
Depreciation and amortization	155		316
Operating Segments [Member] | Specialty Talent and Technology [Member]
Segment Reporting Information [Line Items]
Revenue	17,914		18,393
Gross profit	4,955		5,312
Operating profit			445
Assets	38,017			38,505
Depreciation and amortization	440		1,002
Operating Segments [Member] | Specialty Talent and Technology [Member] | EdgeRock Technologies, LLC [Member]
Segment Reporting Information [Line Items]
Operating profit	(1,042)		800
Operating Segments [Member] | Engineering Solutions [Member]
Segment Reporting Information [Line Items]
Revenue	56,196		63,254
Gross profit	13,481		15,477
Operating profit	(2,601)		(1,935)
Restructuring and other related costs	0		37
Assets	92,281			93,067
Depreciation and amortization	1,014		1,271
Operating Segments [Member] | MRI [Member]
Segment Reporting Information [Line Items]
Revenue	11,294		12,228
Gross profit	5,369		6,005
Operating profit	249		583
Assets	21,552			22,558
Depreciation and amortization	68		66
Corporate [Member]
Segment Reporting Information [Line Items]
Operating profit	(4,245)		(4,049)
Assets	37,997			$ 32,392
Depreciation and amortization	$ 433		$ 427