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Concentration of Credit Risk	12 Months Ended
Concentration of Credit Risk	Dec. 31, 2019
Risks and Uncertainties [Abstract]
Concentration of Credit Risk	Concentration of Credit Risk Financial instruments that subject the Company to concentration of credit risk are cash and cash equivalents and accounts receivable. Cash equivalents consist principally of short-term money market funds. These instruments are short-term in nature and bear minimal risk. The Company performs ongoing credit evaluations of its customers’ financial conditions, but does not require collateral to support domestic customer accounts receivable. For goods shipped FOB Hong Kong or China, the Company may require irrevocable letters of credit from the customer or purchase various forms of credit insurance.