Basis of Presentation and Summary of Significant Accounting Policies - Certain Risks and Concentrations (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Total Expenditures | Supplier concentration risk | Offshore Supplier
Concentration Risk [Line Items]
Concentration risk (less than for geographic concentration risk)	19.00%	26.00%
Accounts Payable | Supplier concentration risk | Offshore Supplier
Concentration Risk [Line Items]
Concentration risk (less than for geographic concentration risk)	54.00%		60.00%
Distributor To The U.S. Navy | Revenue | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk (less than for geographic concentration risk)	15.00%	50.00%
Shipbuilder For U.S. Navy | Accounts receivable | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk (less than for geographic concentration risk)	11.00%	36.00%
Shipbuilder For U.S. Navy | Revenue | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk (less than for geographic concentration risk)	21.00%
Commercial Building Systems Provider | Accounts receivable | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk (less than for geographic concentration risk)	28.00%
Commercial Building Systems Provider | Revenue | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk (less than for geographic concentration risk)	19.00%
Distributor To The U.S. Navy Combined With Sales To Shipbuilders | Revenue | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk (less than for geographic concentration risk)	37.00%	57.00%
Regional Commercial Lighting Retrofit Company | Revenue | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk (less than for geographic concentration risk)		11.00%
Distributor To The U.S. Department Of Defense | Accounts receivable | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk (less than for geographic concentration risk)	10.00%	20.00%