Summary of Significant Accounting Policies - Major Customers (Details) - Customer Concentration Risk	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Accounts Receivable | W. W. Grainger Inc
Product Information [Line Items]
Concentration risk, percentage	13.00%
Accounts Receivable | W. W. Grainger Inc | Construction Services
Product Information [Line Items]
Concentration risk, percentage	24.00%
Accounts Receivable | W. W. Grainger Inc | Technologies
Product Information [Line Items]
Concentration risk, percentage	39.00%		30.00%
Accounts Receivable | Rivian Automotive, Inc. | Manufacturing
Product Information [Line Items]
Concentration risk, percentage	28.00%		31.00%
Accounts Receivable | Lighthouse Worldwide Solutions | Manufacturing
Product Information [Line Items]
Concentration risk, percentage	25.00%		20.00%
Accounts Receivable | Prime Contractors | Defense
Product Information [Line Items]
Concentration risk, percentage	100.00%
Accounts Receivable | A. Hattersley & Sons, Inc. | Construction Services
Product Information [Line Items]
Concentration risk, percentage			25.00%
Accounts Receivable | Shambaugh & Sons L.P. | Construction Services
Product Information [Line Items]
Concentration risk, percentage			17.00%
Accounts Receivable | Direct Supply, Inc. | Technologies
Product Information [Line Items]
Concentration risk, percentage			14.00%
Accounts Receivable | Branch Civil, Inc. | Aerospace
Product Information [Line Items]
Concentration risk, percentage			57.00%
Revenue | Technologies
Product Information [Line Items]
Concentration risk, percentage	33.00%
Revenue | W. W. Grainger Inc
Product Information [Line Items]
Concentration risk, percentage	13.00%
Revenue | Rivian Automotive, Inc.
Product Information [Line Items]
Concentration risk, percentage		15.00%
Revenue | Rivian Automotive, Inc. | Manufacturing
Product Information [Line Items]
Concentration risk, percentage	23.00%	34.00%
Revenue | Lighthouse Worldwide Solutions
Product Information [Line Items]
Concentration risk, percentage		10.00%
Revenue | Lighthouse Worldwide Solutions | Manufacturing
Product Information [Line Items]
Concentration risk, percentage	13.00%	23.00%
Revenue | Prime Contractors
Product Information [Line Items]
Concentration risk, percentage	11.00%
Revenue | A. Hattersley & Sons, Inc. | Construction Services
Product Information [Line Items]
Concentration risk, percentage	19.00%	11.00%