Annual report pursuant to Section 13 and 15(d)

Debt - Schedule of Debt (Details)

v3.20.4
Debt - Schedule of Debt (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Other Short-term Borrowings $ 1,000,000.0 $ 0
Short-term debt 5,500,000 0
Finance lease liabilities 300,000 200,000
Long-term Debt, Current Maturities 2,900,000 200,000
Finance lease liabilities 700,000 300,000
Long-term debt excluding current maturities 71,400,000 42,500,000
Debt, Long-term and Short-term, Combined Amount 79,800,000 42,700,000
Long-term Debt, Gross 78,100,000 42,500,000
Debt Issuance Costs, Net (6,700,000) 0
Revolving Credit Facility    
Debt Instrument [Line Items]    
Long-term Debt, Gross 10,000,000.0 42,200,000
CHINA    
Debt Instrument [Line Items]    
Line of Credit, Current 4,500,000 0
Loans    
Debt Instrument [Line Items]    
Loans Payable, Current 2,600,000 0
Line of Credit    
Debt Instrument [Line Items]    
Loans Payable, Noncurrent $ 67,400,000 $ 0