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Fair Value Measurements (Policies)
3 Months Ended
Mar. 31, 2019
Fair Value Disclosures [Abstract]  
Cash and Cash Equivalents, Policy
The Company classifies all highly liquid investments with stated maturities of three months or less from date of purchase as cash equivalents and all highly liquid investments with stated maturities of greater than three months from the date of purchase as current marketable securities. Available for sale securities with stated maturities of greater than one year from the date of purchase are available for current operations and are classified as cash equivalents and current marketable securities.