Leases - Schedule of Right-of-Use Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Lessee Lease Description [Line Items]
Right-of-use assets	$ 2,818	$ 963
Lease liabilities	2,866	1,003
Del Mar, CA [Member]
Lessee Lease Description [Line Items]
Right-of-use assets	512	613
Lease liabilities	541	641
Hayward F G H K Industrial L L C
Lessee Lease Description [Line Items]
Right-of-use assets	2,128
Lease liabilities	2,145
Burlingame C A
Lessee Lease Description [Line Items]
Right-of-use assets		99
Lease liabilities		109
Edwardsville, IL [Member]
Lessee Lease Description [Line Items]
Right-of-use assets	178	251
Lease liabilities	$ 180	$ 253