Accounts Receivable and Significant Concentrations (Details 1) - Accounts Receivable	6 Months Ended	12 Months Ended
Jun. 30, 2020	Dec. 31, 2019
National Aeronautics and Space Administration
Concentration risk	16.00%	21.00%
U.S. Census Bureau
Concentration risk	50.00%	18.00%

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.

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