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Summary of Business and Significant Accounting Policies - Concentration of Credit Risk (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2021 USD ($) customer | Mar. 31, 2020 customer | Mar. 31, 2021 USD ($) customer | Mar. 31, 2020 customer | Jun. 30, 2020 USD ($)
Concentration of Credit Risk |  |  |  |  |
Number of customers that accounted for more than ten percent of total revenue | customer | 2 | 2 | 2 | 2 |
Contract receivables |  |  |  |  |
Unbilled accounts receivable | $ | $ 855 |  | $ 855 |  | $ 1,700
Sales | Customer Concentration Risk | Customer One |  |  |  |  |
Concentration of Credit Risk |  |  |  |  |
Concentration risk, percentage | 23.00% | 18.00% | 20.00% | 18.00% |
Sales | Customer Concentration Risk | Customer Two |  |  |  |  |
Concentration of Credit Risk |  |  |  |  |
Concentration risk, percentage | 13.00% | 10.00% | 12.00% | 10.00% |

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