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Contract With Customer, Customer Payment Terms

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Amount of allowance for credit loss on accounts receivable.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of direct write-downs of accounts receivable charged against the allowance.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of expense (reversal of expense) for expected credit loss on accounts receivable.

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Fair Value Measurements and Financial Instruments (Details) - USD ($) $ in Thousands		3 Months Ended
	Jan. 01, 2020	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents measured at fair value				$ 21,300	$ 21,300
Cash balances on deposit with financial institutions				69,534	68,978
Customer payment terms		45 days
Allowance for credit losses		$ 773		$ 773	$ 773
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Provision for credit losses on December 31, 2020		773
Bad Debt Expense [Abstract]
Current period provision	$ 4,900	0
Amounts written off		0
Provision for credit losses on March 31, 2021		$ 773
Customer Concentration Risk \| Customer A \| Accounts Receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage		10.00%	0.00%
Customer Concentration Risk \| Customer A \| Total Revenue
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage		10.00%	0.00%
Customer Concentration Risk \| Customer B \| Accounts Receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage		0.00%	11.00%
Customer Concentration Risk \| Customer B \| Total Revenue
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage		0.00%	0.00%
Customer Concentration Risk \| Customer C \| Accounts Receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage		0.00%	11.00%
Customer Concentration Risk \| Customer C \| Total Revenue
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage		0.00%	0.00%
Customer Concentration Risk \| Customer D \| Accounts Receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage		0.00%	0.00%
Customer Concentration Risk \| Customer D \| Total Revenue
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage		0.00%	15.00%