Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income	$ 8,470	$ 8,894
Adjustments to reconcile net income to net cash provided by (used in) operating activities, net of acquisitions:
Depreciation and amortization	3,521	3,601
Deferred income taxes	126	165
Stock-based compensation	2,485	2,239
Amortization of debt issuance costs under the credit facility	215	184
Provision for doubtful accounts	158	252
Impairment of operating lease assets	1,174
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	7,121	(6,397)
Prepaid expenses and other current assets	4,161	(1,007)
Government stimulus advances		(11,719)
Accounts payable	1,386	(290)
Accrued payroll	(17,443)	(15,313)
Accrued expenses and other long-term liabilities	(5,391)	1,025
Net cash provided by (used in) operating activities	5,983	(18,366)
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	(84,490)
Purchases of property and equipment	(1,104)	(1,021)
Net cash used in investing activities	(85,594)	(1,021)
Cash flows from financing activities:
Payments on term loan — credit facility		(245)
Borrowings on revolver — credit facility	35,000
Cash received from exercise of stock options	479	101
Net cash provided by (used in) financing activities	35,479	(144)
Net change in cash	(44,132)	(19,531)
Cash, at beginning of period	168,895	145,078
Cash, at end of period	124,763	125,547
Supplemental disclosures of cash flow information:
Cash paid for interest	$ 1,619	$ 1,174