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Note 10 - Contract Balances	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	10.   Contract Balances In certain cases, the Company’s customers pay for their goods in advance. These prepayments are recognized as customer deposits (contract liabilities) and recorded in other accrued liabilities in the condensed consolidated balance sheets. The balance of customer deposits was $30,659 and $25,710 at March 31, 2021 and December 31, 2020, respectively. During the three months ended March 31, 2021, the Company recognized revenue of $16,912 related to amounts included in the December 31, 2020 customer deposit balance. The Company typically recognizes revenue within one year of the receipt of the customer deposit.

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- References

No definition available.

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- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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