Business Combinations - Preliminary Purchase Price and Net Assets Acquired (Details) - SSS $ in Thousands	Jun. 07, 2019 USD ($)
Business Acquisition [Line Items]
Preliminary purchase price for SSS	$ 69,558
Estimated net assets acquired
Cash and cash equivalents	3,037
Accounts receivable	12,819
Other current assets	1,418
Total current assets	17,274
Accounts payable and accrued expenses	(3,933)
Payroll liabilities	(3,458)
Estimated net working capital	9,883
Property and equipment, net	4,605
Net identifiable assets acquired	14,488
Goodwill and other intangibles	55,070
Net assets acquired	$ 69,558