Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues:
Total revenues	$ 218,215	$ 223,975
Cost of revenues:
Total cost of revenues	189,868	207,713
Gross margin	28,347	16,262
Selling, general and administrative expenses	33,160	29,428
Depreciation and amortization	969	1,004
Loss from operations	(5,782)	(14,170)
Other income (expense):
Investment income, net	3,072	2,019
Interest expense	(477)	(42)
Other, net	12	16
Other income, net	2,607	1,993
Loss before income taxes	(3,175)	(12,177)
Benefit from income taxes	(875)	(3,054)
Net loss	$ (2,300)	$ (9,123)
Basic loss per common share	$ (0.31)	$ (1.25)
Weighted average number of basic common shares outstanding	7,407	7,304
Diluted loss per common share	$ (0.31)	$ (1.25)
Weighted average number of diluted common shares outstanding	7,407	7,304
Cash dividends per common share	$ 250	$ 250
Professional Employer Service Fees [Member]
Revenues:
Total revenues	$ 190,527	$ 188,961
Staffing Services [Member]
Revenues:
Total revenues	27,688	35,014
Direct Payroll Costs [Member]
Cost of revenues:
Total cost of revenues	20,842	26,404
Payroll Taxes and Benefits [Member]
Cost of revenues:
Total cost of revenues	114,797	124,188
Workers' Compensation [Member]
Cost of revenues:
Total cost of revenues	$ 54,229	$ 57,121