Number of customers accounted for more than ten percentage of revenue.

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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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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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- References

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Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

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Summary of Business and Significant Accounting Policies - Concentration of Credit Risk (Details) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2020 USD ($) customer	Mar. 31, 2019 customer	Mar. 31, 2020 USD ($) customer	Mar. 31, 2019 customer	Jun. 30, 2019 USD ($)
Concentration of Credit Risk
Number of customers that accounted for more than ten percent of total revenue \| customer	2	1	2	1
Contract receivables
Unbilled accounts receivable \| $	$ 1.5		$ 1.5		$ 1.4
Sales \| Customer Concentration Risk \| Customers One and Two
Concentration of Credit Risk
Concentration risk, percentage	18.00%		10.00%
Sales \| Customer Concentration Risk \| Customer One
Concentration of Credit Risk
Concentration risk, percentage		16.00%		17.00%