Segment Reporting and Geographic Information  - Additional Information (Details)  | 
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
| 
 Mar. 31, 2019  
customer 
 | 
 Mar. 31, 2018  
customer 
 | 
 Mar. 31, 2019  
customer  
segment 
 | 
 Mar. 31, 2018  
customer 
 | 
 Jun. 30, 2018  
customer 
 | 
|
| Segment Reporting Information | |||||
| Number of reportable segments | segment | 1 | ||||
| Number of customers with significant revenue | 1 | 2 | 2 | 1 | |
| Segment percent of total revenues | 100.00% | 100.00% | 100.00% | 100.00% | |
| Number of customers with significant accounts receivable balance | 1 | 1 | 3 | ||
| Customer One | |||||
| Segment Reporting Information | |||||
| Segment percent of total revenues | 19.00% | 22.00% | 15.00% | 22.00% | |
| Customer Two | |||||
| Segment Reporting Information | |||||
| Segment percent of total revenues | 11.00% | 11.00% | |||
| X | ||||||||||
- Definition Total number of customers with individual accounts receivable balances representing 10 percent or more of total accounts receivable No definition available. 
  | 
| X | ||||||||||
- Definition Total number of significant external customers who individually generate revenue that accounts for 10 percent or more of total revenues No definition available. 
  | 
| X | ||||||||||
- Definition Segment Percent Of Total Revenue No definition available. 
  | 
| X | ||||||||||
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. No definition available. 
  | 
| X | ||||||||||
- Definition 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. No definition available. 
  | 
| X | ||||||||||
- Details 
  | 
| X | ||||||||||
- Details 
  |